TLE7251VLEXUMA1

TLE7251V Hi gh Speed CAN-Transceiver with Bus Wake-up 1 Overview Features • Fully compatible to ISO 11898-2/-5 • Wide common mode range for electromagnetic immunity (EMI) • Very low electromagnetic emission (EME) • Excellent ESD robustness • Guaranteed loop delay symmetry to support CAN FD data frames up to 2 MBit/s • VIO input for voltage adaption to the microcontroller supply • Extended supply range on VCC and VIO supply • CAN short circuit proof to ground, battery and VCC • TxD time-out function • Low CAN bus leakage current in power-down state • Overtemperature protection • Protected against automotive transients • Stand-by mode with remote wake-up function • Wake-up indication on the RxD output • Transmitter supply VCC can be turned off in stand-by mode • Green Product (RoHS compliant) • Two package variants: PG-TSON-8 and PG-DSO-8 Potential applications • Gateway modules • Body Control Modules (BCM) • Engine Control Unit (ECUs) Product validation Qualified for automotive applications. Product validation according to AEC-Q100/101. Data Sheet www.infineon.com/automotive-transceivers 1 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Overview Description The TLE7251V is a transceiver designed for HS CAN networks in automotive and industrial applications. As an interface between the physical bus layer and the CAN protocol controller, the TLE7251V drives the signals to the bus and protects the microcontroller against interferences generated within the network. Based on the high symmetry of the CANH and CANL signals, the TLE7251V provides a very low level of electromagnetic emission (EME) within a wide frequency range. The TLE7251V is available in a small, leadless PG-TSON-8 package and in a PG-DSO-8 package. Both packages are RoHS compliant and halogen free. Additionally the PG-TSON-8 package supports the solder joint requirements for automated optical inspection (AOI). The TLE7251VLE and the TLE7251VSJ are fulfilling or exceeding the requirements of the ISO11898-2. The TLE7251V provides a digital supply input VIO and a stand-by mode. It is designed to fulfill the enhanced physical layer requirements for CAN FD and supports data rates up to 2 MBit/s. On the basis of a very low leakage current on the HS CAN bus interface the TLE7251V provides an excellent passive behavior in power-down state. These and other features make the TLE7251V exceptionally suitable for mixed supply HS CAN networks. Based on the Infineon Smart Power Technology SPT, the TLE7251V provides excellent ESD immunity together with a very high electromagnetic immunity (EMI). The TLE7251V and the Infineon SPT technology are AEC qualified and tailored to withstand the harsh conditions of the automotive environment. Two different operating modes, additional fail-safe features like a TxD time-out and the optimized output slew rates on the CANH and CANL signals make the TLE7251V the ideal choice for large HS CAN networks with high data transmission rates. Type Package Marking TLE7251VLE PG-TSON-8 7251V TLE7251VSJ PG-DSO-8 7251V Data Sheet 2 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Table of contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Potential applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 3.1 3.2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 4.1 4.2 4.2.1 4.2.2 4.3 4.3.1 4.3.2 4.3.3 4.3.4 4.3.5 4.3.6 4.4 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 High speed CAN physical layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Normal-operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Stand-by mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Power-up and undervoltage condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Power-down state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Forced stand-by mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Undervoltage on the digital supply VIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Undervoltage on the transmitter supply VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Voltage adaption to the microcontroller supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Remote wake-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 5.1 5.2 5.3 5.4 5.5 Fail safe functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unconnected logic pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TxD time-out function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delay time for mode change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 15 15 15 16 16 6 6.1 6.2 6.3 General product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 17 18 18 7 7.1 7.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Functional device characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8 8.1 8.2 8.3 8.3.1 8.3.2 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESD robustness according to IEC61000-4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Examples for mode changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mode change to stand-by mode during a “dominant” bus signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mode changes from stand-by mode to normal-operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Sheet 3 26 26 27 28 29 30 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up 8.3.2.1 8.3.2.2 8.4 Mode change while the TxD Signal is “low” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Mode change while the bus signal is “dominant” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Further application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 9 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Data Sheet 4 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Block diagram 2 Block diagram 3 5 VCC VIO Transmitter CANH CANL 1 7 Driver Tempprotection 6 Receiver TxD Timeout 8 Mode control STB Normal-mode receiver 4 Mux RxD Wake-logic & filter Low-power receiver VIO VCC/2 = Bus-biasing GND 2 Figure 1 Data Sheet Functional block diagram 5 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Pin configuration 3 Pin configuration 3.1 Pin assignment TxD 1 8 STB GND 2 7 CANH VCC 3 6 CANL RxD 4 5 TxD 1 8 STB GND 2 7 CANH VCC 3 6 CANL RxD 4 5 PAD VIO (Top-side x-ray view) Figure 2 Pin configuration 3.2 Pin definitions Table 1 Pin definitions and functions VIO Pin No. Symbol Function 1 TxD Transmit data input; Internal pull-up to VIO, “low” for “dominant” state. 2 GND Ground 3 VCC Transmitter supply voltage; 100 nF decoupling capacitor to GND required, VCC can be turned off in stand-by mode. 4 RxD Receive data output; “Low” in “dominant” state. 5 VIO Digital supply voltage; Supply voltage input to adapt the logical input and output voltage levels of the transceiver to the microcontroller supply, supply for the low-power receiver, 100 nF decoupling capacitor to GND required. 6 CANL CAN bus low level I/O; “Low” in “dominant” state. 7 CANH CAN bus high level I/O; “High” in “dominant” state. 8 STB Stand-by input; Internal pull-up to VIO, “low” for normal-operating mode. PAD – Connect to PCB heat sink area. Do not connect to other potential than GND. Data Sheet 6 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description 4 Functional description HS CAN is a serial bus system that connects microcontrollers, sensors and actuators for real-time control applications. The use of the Controller Area Network (abbreviated CAN) within road vehicles is described by the international standard ISO 11898. According to the 7-layer OSI reference model the physical layer of a HS CAN bus system specifies the data transmission from one CAN node to all other available CAN nodes within the network. The physical layer specification of a CAN bus system includes all electrical and mechanical specifications of a CAN network. The CAN transceiver is part of the physical layer specification. Several different physical layer standards of CAN networks have been developed in recent years. The TLE7251V is a high speed CAN transceiver with a dedicated bus wake-up function and defined by the international standard ISO 11898-5. 4.1 High speed CAN physical layer VIO = VCC = TxD = TxD VIO RxD = CANH = t CANH CANL CANL = VDiff = VCC Digital supply voltage Transmitter supply voltage Transmit data input from the microcontroller Receive data output to the microcontroller Bus level on the CANH input/output Bus level on the CANL input/output Differential voltage between CANH and CANL VDiff = VCANH – VCANL t VDiff VCC “dominant” receiver threshold “recessive” receiver threshold t RxD VIO tLoop(H,L) Figure 3 Data Sheet tLoop(L,H) t High speed CAN bus signals and logic signals 7 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description The TLE7251V is a high speed CAN transceiver, operating as an interface between the CAN controller and the physical bus medium. A HS CAN network is a two wire, differential network which allows data transmission rates for CAN FD frames up to 2 MBit/s. Characteristic for HS CAN networks are the two signal states on the HS CAN bus: “dominant” and “recessive” (see Figure 3). VCC, VIO and GND are the supply pins for the TLE7251V. The pins CANH and CANL are the interface to the HS CAN bus and operate in both directions, as an input and as an output. RxD and TxD pins are the interface to the CAN controller, the TxD pin is an input pin and the RxD pin is an output pin. The STB pin is the input pin for the mode selection (see Figure 4). By setting the TxD input pin to logical “low” the transmitter of the TLE7251V drives a “dominant” signal to the CANH and CANL pins. Setting TxD input to logical “high” turns off the transmitter and the output voltage on CANH and CANL discharges towards the “recessive” level. The “recessive” output voltage is provided by the bus biasing (see Figure 1). The output of the transmitter is considered to be “dominant”, when the voltage difference between CANH and CANL is at least higher than 1.5 V (VDiff = VCANH - VCANL). Parallel to the transmitter the normal-mode receiver monitors the signal on the CANH and CANL pins and indicates it on the RxD output pin. A “dominant” signal on the CANH and CANL pins sets the RxD output pin to logical “low”, vice versa a “recessive” signal sets the RxD output to logical “high”. The normal-mode receiver considers a voltage difference (VDiff) between CANH and CANL above 0.9 V as “dominant” and below 0.5 V as “recessive”. To be conform with HS CAN features, like the bit to bit arbitration, the signal on the RxD output has to follow the signal on the TxD input within a defined loop delay tLoop ≤ 255 ns. The thresholds of the digital inputs (TxD and STB) and also the RxD output voltage are adapted to the digital power supply VIO. Data Sheet 8 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description 4.2 Modes of operation The TLE7251V supports two different modes of operation, stand-by mode and normal-operating mode while the transceiver is supplied according to the specified functional range. The mode of operation is selected by the STB input pin (see Figure 4). stand-by mode VCC = “don’t care” VIO > VIO(UV,R) STB = 1 STB = 0 VCC > VCC(UV,R) STB = 1 normal-operating mode VIO > VIO(UV,R) STB = 0 Figure 4 Mode state diagram 4.2.1 Normal-operating mode In normal-operating mode the transmitter and the receiver of the HS CAN transceiver TLE7251V are active (see Figure 1). The HS CAN transceiver sends the serial data stream on the TxD input pin to the CAN bus. The data on the CAN bus is displayed at the RxD pin simultaneously. A logical “low” signal on the STB pin selects the normal-operating mode, while the transceiver is supplied by VCC and VIO (see Table 2 for details). 4.2.2 Stand-by mode The stand-by mode is an idle mode of the TLE7251V with optimized power consumption. In stand-by mode the transmitter and the normal-mode receiver are turned off. The TLE7251V can not send any data to the CAN bus nor receive any data from the CAN bus. The low-power receiver is connected to the bus lines. Wake-up signals are indicated on the RxD output pin. An additional filter, implemented inside the low-power receiver, ensures that only “dominant” and recessive” signals on the CAN bus, which are longer than the CAN activity filter time tFilter, are indicated at the RxD output pin (see Figure 8). A logical “high” signal on the STB pin selects the stand-by mode, while the transceiver is supplied by the digital supply VIO (see Table 2 for details). In stand-by mode the bus input pins are biased to GND via the receiver input resistors Ri. The undervoltage detection on the transmitter supply VCC is turned off, allowing to switch off the VCC supply in stand-by mode. Data Sheet 9 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description 4.3 Power-up and undervoltage condition By detecting an undervoltage event, either on the transmitter supply VCC or the digital supply VIO, the transceiver TLE7251V changes the mode of operation. Turning off the digital power supply VIO, the transceiver powers down and remains in the power-down state. While switching off the transmitter supply VCC, the transceiver either changes to the forced stand-by mode, or remains in stand-by mode (details see Figure 5). normal-operating mode VIO “on” VCC “on” STB “0” VCC VIO “X” “X” “off” VCC VIO 0 “on” “on” VIO “on” VCC “on” STB “0” power-down state STB STB VIO “on” VCC “X” STB “1” Figure 5 Power-up and undervoltage Table 2 Modes of operation VIO “on” VCC “off” STB “0” forced stand-by mode VIO “on” VCC “off” STB “0” VIO “on” VCC “X” STB “1” VIO “on” VCC “on” STB “0” STB VCC VIO 0 “off” “on” VIO “on” VCC “X” STB “1” stand-by mode STB VCC VIO 1 “X” “on” Mode STB VIO VCC Bus Bias Transmitter Normalmode receiver Low-power receiver Normaloperating “low” “on” “on” VCC/2 “on” “on” “off” Stand-by “high” “on” “X” GND “off” “off” “on” Forced stand-by “low” “on” “off” GND “off” “off” “on” “off” “X” floating “off” “off” “off” Power-down “X” state Data Sheet 10 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description 4.3.1 Power-down state Independent of the transmitter supply VCC and of the STB input pin, the TLE7251V is in power-down state when the digital supply voltage VIO is turned off (see Figure 5). In the power-down state the input resistors of the receiver are disconnected from the bus biasing VCC/2. The CANH and CANL bus interface of the TLE7251V is floating and acts as a high-impedance input with a very small leakage current. The high-ohmic input does not influence the “recessive” level of the CAN network and allows an optimized EME performance of the entire HS CAN network (see also Table 2). 4.3.2 Forced stand-by mode The forced stand-by mode is a fail-safe mode to avoid any disturbance on the HS CAN bus, while the TLE7251V faces a loss of the transmitter supply VCC. In forced stand-by mode, the transmitter and the normal-mode receiver are turned off and therefore the transceiver TLE7251V can not disturb the bus media. Similar to the stand-by mode, the low-power receiver is connected to the bus lines and wake-up signals on the CAN bus are indicated at the RxD output pin (see Figure 8). In forced stand-by mode the bus is also biased to GND (details see Table 2) via the receiver input resistors. The forced stand-by mode can only be entered when the transmitter supply VCC is not available, either by powering up the digital supply VIO only or by turning off the transmitter supply in normal-operating mode. While the transceiver TLE7251V is in forced stand-by mode, switching the STB input pin to logical “high” triggers a mode change to stand-by mode (see Figure 5). 4.3.3 Power-up The HS CAN transceiver TLE7251V powers up if at least the digital supply VIO is connected to the device. By default the device powers up in stand-by mode, due to the internal pull-up resistor on the STB pin to VIO. In case the device needs to power-up to normal-operating mode, the STB pin needs to be pulled active to logical “low” and the supplies VIO and VCC have to be connected. By supplying only the digital power supply VIO the TLE7251V powers up either in forced stand-by mode or stand-by mode, depending on the signal of the STB input pin. (see Figure 5). Data Sheet 11 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description Undervoltage on the digital supply VIO 4.3.4 If the voltage on VIO supply input falls below the threshold VIO < VIO(UV,F), the transceiver TLE7251V powers down and changes to the power-down state. The undervoltage detection on the digital supply VIO has the highest priority. It is independent of the transmitter supply VCC and also independent of the currently selected operating mode. An undervoltage event on VIO always powers down the TLE7251V. transmitter supply voltage VCC = “don’t care” VIO VIO undervoltage monitor VIO(UV,F) VIO undervoltage monitor VIO(UV,R) hysteresis VIO(UV,H) tDelay(UV) delay time undervoltage t any mode of operation power-down state stand-by mode STB “high” due the internal pull-up resistor1) “X” = don’t care 1) Figure 6 Data Sheet assuming no external signal applied t Undervoltage on the digital supply VIO 12 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description Undervoltage on the transmitter supply VCC 4.3.5 In case the transmitter supply VCC falls below the threshold VCC < VCC(UV,F), the transceiver TLE7251V changes the mode of operation to forced stand-by mode. The transmitter and also the normal-mode receiver of the TLE7251V are powered by the VCC supply. In case of an insufficient VCC supply, the TLE7251V can neither transmit the CANH and CANL signals correctly to the bus, nor can it receive them properly. Therefore the TLE7251V blocks the transmitter and the receiver in forced stand-by mode. The low-power receiver is active in forced stand-by mode (see Figure 7). The undervoltage detection on the transmitter supply VCC is only active in normal-operating mode (see Figure 5). digital supply voltage VIO = “on” VCC VCC undervoltage monitor VCC(UV,F) VCC undervoltage monitor VCC(UV,R) hysteresis VCC(UV,H) tDelay(UV) delay time undervoltage t normal-operating mode forced stand-by mode normal-operating mode STB Assuming the STB remains “low”. The “low” signal is driven by the external microcontroller Figure 7 Undervoltage on the transmitter supply VCC 4.3.6 Voltage adaption to the microcontroller supply t The HS CAN transceiver TLE7251V has two different power supplies, VCC and VIO. The power supply VCC supplies the transmitter and the normal-mode receiver. The power supply VIO supplies the digital input and output buffers, the low-power receiver, the wake-up logic and it is also the main power domain for the internal logic. To adjust the digital input and output levels of the TLE7251V to the I/O levels of the external microcontroller, connect the power supply VIO to the microcontroller I/O supply voltage (see Figure 14). Note: Data Sheet In case the digital supply voltage VIO is not required in the application, connect the digital supply voltage VIO to the transmitter supply VCC. 13 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Functional description 4.4 Remote wake-up The TLE7251V has a remote wake-up feature, also called bus wake-up feature. In both stand-by mode and forced stand-by mode, the low-power receiver monitors the activity on the CAN bus and in case it detects a wake-up signal, the TLE7251V indicates the wake-up signal on the RxD output pin. While entering stand-by mode, the RxD output pin is set to logical “high”, regardless of the signal on the CAN bus. The low-power receiver of the TLE7251V requires a signal change from “recessive” to “dominant” on the CAN bus before the RxD output is enabled to follow the signals on the HS CAN bus. HS CAN bus signals, “dominant” or “recessive”, with a pulse width above the CAN activity filter time t > tFilter are indicated on the RxD output pin. Glitches with a pulse width below the CAN activity filter time t < tFilter are ignored and not considered as a valid wake-up signal. The RxD output reacts within the reaction time tWU_Rec after detecting a wake-up signal (see Figure 8). Note: A wake-up event on the CAN bus is only indicated on the RxD output, no automatic change of the operating mode is applied. To enter normal-operating mode, the external microcontroller needs to change the signal on the STB pin. The wake-up logic is supplied by the power supply VIO (see Figure 1). In case the TLE7251V is in stand-by mode the power supply VCC can be turned off, while the TLE7251V is still able to detect a wake-up signal on the HS CAN bus (see also Figure 4). VDiff = VCANH - VCANL t < tFilter t = tFilter t = tWU_Rec t = tFilter t = tWU_Rec VDiff 1.15V 0.4V 1.15 V 0.4 V t RxD 0.7 x VIO 0.3 x VIO t STB t Figure 8 Data Sheet Wake-up pattern 14 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Fail safe functions 5 Fail safe functions 5.1 Short circuit protection The CANH and CANL bus outputs are short circuit proof, either against GND or a positive supply voltage. A current limiting circuit protects the transceiver against damages. If the device is heating up due to a continuous short on the CANH or CANL, the internal overtemperature protection switches off the bus transmitter. 5.2 Unconnected logic pins All logic input pins have an internal pull-up resistor to VIO. In case the VIO supply is activated and the logical pins are open, the TLE7251V enters into the stand-by mode by default. In stand-by mode the transmitter of the TLE7251V is disabled, the bus bias is turned off and the input resistors of CANH and CANL are connected to GND. 5.3 TxD time-out function The TxD time-out feature protects the CAN bus against permanent blocking in case the logical signal on the TxD pin is continuously “low”. A continuous “low” signal on the TxD pin might have its root cause in a lockedup microcontroller or in a short circuit on the printed circuit board, for example. In normal-operating mode, a logical “low” signal on the TxD pin for the time t > tTxD enables the TxD time-out feature and the TLE7251V disables the transmitter (see Figure 9). The receiver is still active and the data on the bus continues to be monitored by the RxD output pin. t > tTxD TxD time-out TxD time–out released CANH CANL t TxD t RxD t Figure 9 TxD time-out function Figure 9 illustrates how the transmitter is deactivated and activated again. A permanent “low” signal on the TxD input pin activates the TxD time-out function and deactivates the transmitter. To release the transmitter after a TxD time-out event the TLE7251V requires a signal change on the TxD input pin from logical “low” to logical “high”. Data Sheet 15 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Fail safe functions 5.4 Overtemperature protection The TLE7251V has an integrated overtemperature detection to protect the TLE7251V against thermal overstress of the transmitter. The overtemperature protection is active in normal-operating mode and disabled in stand-by mode. In case of an overtemperature condition, the temperature sensor will disable the transmitter (see Figure 1) while the transceiver remains in normal-operating mode. After the device has cooled down the transmitter is activated again (see Figure 10). A hysteresis is implemented within the temperature sensor. TJSD (shut down temperature) TJ cool down ˂T switch-on transmitter t CANH CANL t TxD t RxD t Figure 10 Overtemperature protection 5.5 Delay time for mode change The HS CAN transceiver TLE7251V changes the mode of operation within the time window tMode. During the mode change the RxD output pin is permanently set to logical “high” and does not reflect the status on the CANH and CANL input pins. While changing the mode of operation from normal-operating mode to stand-by mode, the transceiver TLE7251V turns off the transmitter and switches from the normal-mode receiver to the low-power receiver. After the mode change is completed, the transceiver TLE7251V releases the RxD output pin (see as an example Figure 16 and Figure 17). Data Sheet 16 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up General product characteristics 6 General product characteristics 6.1 Absolute maximum ratings Table 3 Absolute maximum ratings voltages, currents and temperatures1) All voltages with respect to ground; positive current flowing into pin; (unless otherwise specified) Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Voltages Transmitter supply voltage VCC -0.3 – 6.0 V – P_6.1.1 Digital supply voltage VIO -0.3 – 6.0 V – P_6.1.2 CANH DC voltage versus GND VCANH -40 – 40 V – P_6.1.3 CANL DC voltage versus GND VCANL -40 – 40 V – P_6.1.4 Differential voltage between CANH and CANL VCAN_Diff -40 – 40 V – P_6.1.5 Voltages at the input pins: STB, TxD VMAX_IN -0.3 – 6.0 V – P_6.1.6 Voltages at the output pin: RxD VMAX_OUT -0.3 – VIO V – P_6.1.7 IRxD -20 – 20 mA – P_6.1.8 Junction temperature Tj -40 – 150 °C – P_6.1.9 Storage temperature TS -55 – 150 °C – P_6.1.10 ESD immunity at CANH, CANL VESD_HBM_ -9 versus GND CAN – 9 kV HBM (100 pF via 1.5 kΩ)2) P_6.1.11 ESD immunity at all other pins VESD_HBM_ -2 – 2 kV HBM (100 pF via 1.5 kΩ)2) P_6.1.12 – 750 V CDM3) P_6.1.13 Currents RxD output current Temperatures ESD resistivity ALL ESD immunity to GND VESD_CDM -750 1) Not subject to production test, specified by design. 2) ESD susceptibility, Human Body Model “HBM” according to ANSI/ESDA/JEDEC JS-001. 3) ESD susceptibility, Charge Device Model “CDM” according to EIA/JESD22-C101 or ESDA STM5.3.1. Note: Data Sheet Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Integrated protection functions are designed to prevent IC destruction under fault conditions described in the data sheet. Fault conditions are considered as “outside” normal-operating range. Protection functions are not designed for continuos repetitive operation. 17 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up General product characteristics 6.2 Functional range Table 4 Functional range Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Supply voltages Transmitter supply voltage VCC 4.5 – 5.5 V – P_6.2.1 Digital supply voltage VIO 3.0 – 5.5 V – P_6.2.2 Tj -40 – 150 °C 1) P_6.2.3 Thermal parameters Junction temperature 1) Not subject to production test, specified by design. Note: Within the functional range the IC operates as described in the circuit description. The electrical characteristics are specified within the conditions given in the related electrical characteristics table. 6.3 Thermal resistance Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, please visit www.jedec.org. Table 5 Thermal resistance1) Parameter Symbol Values Min. Typ. Max. – 55 – Unit Note or Test Condition Number K/W 2) TLE7251VLE P_6.3.1 TLE7251VSJ P_6.3.4 Thermal resistances Junction to Ambient PG-TSON-8 RthJA Junction to Ambient PG-DSO-8 RthJA – 130 – K/W 2) Thermal shutdown (junction temperature) Thermal shutdown temperature TJSD 150 175 200 °C – P_6.3.2 Thermal shutdown hysteresis ΔT – 10 – K – P_6.3.3 1) Not subject to production test, specified by design. 2) Specified RthJA value is according to Jedec JESD51-2,-7 at natural convection on FR4 2s2p board. The product (TLE7251V) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70 µm Cu, 2 x 35 µm Cu). Data Sheet 18 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics 7 Electrical characteristics 7.1 Functional device characteristics Table 6 Electrical characteristics 4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Current consumption Current consumption at VCC normal-operating mode ICC – 2.6 4 mA “recessive” state, VTxD = VIO, VSTB = 0 V; P_7.1.1 Current consumption at VCC normal-operating mode ICC – 38 60 mA “dominant” state, VTxD = VSTB = 0 V; P_7.1.2 Current consumption at VIO normal-operating mode IIO – – 1 mA VSTB = 0 V; P_7.1.3 Current consumption at VCC stand-by mode ICC(STB) – – 5 µA VTxD = VSTB = VIO; P_7.1.4 Current consumption at VIO stand-by mode IIO(STB) – 8 14 µA VTxD = VSTB = VIO, 0 V < VCC < 5.5 V; P_7.1.5 VCC undervoltage monitor rising edge VCC(UV,R) 3.8 4.0 4.3 V – P_7.1.58 VCC undervoltage monitor falling edge VCC(UV,F) 3.65 3.85 4.3 V – P_7.1.6 VCC undervoltage monitor hysteresis VCC(UV,H) – 150 – mV 1) P_7.1.7 VIO undervoltage monitor rising edge VIO(UV,R) 2.0 2.5 3.0 V – P_7.1.59 VIO undervoltage monitor falling edge VIO(UV,F) 1.8 2.3 3.0 V – P_7.1.8 VIO undervoltage monitor hysteresis VIO(UV,H) – 200 – mV 1) P_7.1.9 VCC and VIO undervoltage delay time rising edge tDelay(UV) – – 100 µs 1) (see Figure 6 and Figure 7); P_7.1.10 “High” level output current IRD,H – -4 -2 mA VRxD = VIO - 0.4 V, VDiff < 0.5 V; P_7.1.11 “Low” level output current IRD,L 2 4 – mA VRxD = 0.4 V, VDiff > 0.9 V; P_7.1.12 Supply resets Receiver output RxD Data Sheet 19 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics Table 6 Electrical characteristics (cont’d) 4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Transmission input TxD “High” level input voltage threshold VTxD,H – 0.5 × VIO 0.7 × VIO V “recessive” state; P_7.1.13 “Low” level input voltage threshold VTxD,L 0.3 × VIO 0.4 × VIO – V “dominant” state; P_7.1.14 Pull-up resistance RTxD 10 25 50 kΩ – P_7.1.15 Input hysteresis VHYS(TxD) – 450 – mV 1) P_7.1.16 Input capacitance CTxD – – 10 pF 1) P_7.1.17 TxD permanent “dominant” time-out tTxD 4.5 – 16 ms normal-operating mode; P_7.1.18 “High” level input voltage threshold VSTB,H – 0.5 × VIO 0.7 × VIO V stand-by mode; “Low” level input voltage threshold VSTB,L 0.3 × VIO 0.4 × VIO – V normal-operating mode; P_7.1.20 Pull-up resistance RSTB 10 25 50 kΩ – P_7.1.21 Input capacitance CSTB – – 10 pF 1) P_7.1.22 Input hysteresis VHYS(STB) – P_7.1.23 Stand-by input STB 200 – mV 1) P_7.1.19 Bus receiver Differential receiver threshold VDiff_D “dominant” normal-operating mode – 0.75 0.9 V 2) P_7.1.24 Differential receiver threshold VDiff_R “recessive” normal-operating mode 0.5 0.66 – V 2) P_7.1.25 Differential receiver threshold VDiff_D_ST – “dominant” B stand-by mode 0.75 1.15 V 2) P_7.1.26 Differential receiver threshold VDiff_R_ST 0.4 “recessive” B stand-by mode 0.72 – V 2) P_7.1.27 Common mode range -12 – 12 V VCC = 5 V; P_7.1.28 – 90 – mV 1) P_7.1.29 CMR Differential receiver hysteresis VDiff,hys normal-operating mode CANH, CANL input resistance Ri 10 20 30 kΩ “recessive” state; P_7.1.30 Differential input resistance RDiff 20 40 60 kΩ “recessive” state; P_7.1.31 % 1) P_7.1.32 Input resistance deviation between CANH and CANL Data Sheet ΔRi -1 – 1 20 “recessive” state; Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics Table 6 Electrical characteristics (cont’d) 4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Parameter Symbol Values Unit Note or Test Condition Number Min. Typ. Max. – 20 40 pF 1) VTxD = VIO; P_7.1.33 CIn_Diff – 10 20 pF 1) VTxD = VIO; P_7.1.34 CANL/CANH “recessive” output voltage normal-operating mode VCANL/H 2.0 2.5 3.0 V VTxD = VIO, no load; P_7.1.35 CANH, CANL “recessive” output voltage difference normal-operating mode VDiff_NM -500 – 50 mV VTxD = VIO, no load; P_7.1.36 CANH, CANL “recessive” output voltage difference stand-by mode VDiff_STB -0.1 – 0.1 V no load; P_7.1.37 CANL “dominant” output voltage normal-operating mode VCANL 0.5 – 2.25 V VTxD = 0 V; P_7.1.38 CANH “dominant” output voltage normal-operating mode VCANH 2.75 – 4.5 V VTxD = 0 V; P_7.1.39 CANH, CANL “dominant” output voltage difference normal-operating mode according to ISO 11898-2 VDiff = VCANH - VCANL VDiff 1.5 – 3.0 V VTxD = 0 V, 50 Ω < RL < 65 Ω, 4.75 < VCC < 5.25 V; P_7.1.40 CANH, CANL “dominant” output voltage difference normal-operating mode VDiff = VCANH - VCANL VDiff_R45 1.4 – 3.0 V VTxD = 0 V, 45 Ω < RL < 50 Ω, 4.75 < VCC < 5.25 V; P_7.1.56 Driver “dominant” symmetry normal-operating mode VSYM = VCANH + VCANL VSYM 4.5 5 5.5 V VCC = 5.0 V, VTxD = 0 V; P_7.1.41 CANL short circuit current ICANLsc 40 75 100 mA VCANLshort = 18 V, VCC = 5.0 V, t < tTxD, VTxD = 0 V; P_7.1.42 CANH short circuit current ICANHsc -100 -75 -40 mA VCANHshort = 0 V, VCC = 5.0 V, t < tTxD, VTxD = 0 V; P_7.1.43 Input capacitance CANH, CANL CIn versus GND Differential input capacitance Bus transmitter Data Sheet 21 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics Table 6 Electrical characteristics (cont’d) 4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Number Leakage current, CANH ICANH,lk -5 – 5 µA VCC = VIO = 0 V, 0 V < VCANH < 5 V, VCANH = VCANL; P_7.1.44 Leakage current, CANL ICANL,lk -5 – 5 µA VCC = VIO = 0 V, 0 V < VCANL < 5 V, VCANH = VCANL; P_7.1.45 Dynamic CAN-transceiver characteristics Propagation delay TxD-to-RxD “low” (“recessive to “dominant”) tLoop(H,L) – 180 255 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.46 Propagation delay TxD-to-RxD “high” (“dominant” to “recessive”) tLoop(L,H) – 180 255 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.47 Propagation delay extended load TxD-to-RxD “low” (“recessive to “dominant”) tLoop_Ext( – – 300 ns 1) CL = 200 pF, RL = 120 Ω, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.61 Propagation delay extended load TxD-to-RxD “high” (“dominant” to “recessive”) tLoop_Ext(L – – 300 ns 1) CL = 200 pF, RL = 120 Ω, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.62 Propagation delay TxD “low” to bus “dominant” td(L),T – 90 140 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.48 Propagation delay TxD “high” to bus “recessive” td(H),T – 90 140 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.49 Propagation delay bus “dominant” to RxD “low” td(L),R – 90 140 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.50 Propagation delay bus “recessive” to RxD “high” td(H),R – 90 140 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF; P_7.1.51 Delay time for mode change tMode – – 20 µs 1) (see Figure 16); P_7.1.52 RxD reaction delay, stand-by mode to normaloperating mode, tRxD_Rec – – 5 µs 1) (see Figure 17); P_7.1.57 CAN activity filter time tFilter 0.5 – 5 µs (see Figure 8); P_7.1.53 Wake-up reaction time tWU_Rec – – 5 µs 1) P_7.1.60 H,L) ,H) Delay times Data Sheet 22 (see Figure 8); Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics Table 6 Electrical characteristics (cont’d) 4.5 V < VCC < 5.5 V; 3.0 V < VIO < 5.5 V; RL = 60 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Parameter Symbol Values Min. Unit Note or Test Condition Number Typ. Max. 500 550 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF, tBit = 500 ns, (see Figure 13); P_7.1.54 500 530 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF, tBit = 500 ns, (see Figure 13); P_7.1.63 – 40 ns CL = 100 pF, 4.75 V < VCC < 5.25 V, CRxD = 15 pF, tBit = 500 ns, (see Figure 13); P_7.1.64 CAN FD Characteristics Received recessive bit width at 2 MBit/s tBit(RxD)_2 400 Transmitted recessive bit width at 2 MBit/s tBit(Bus)_2 435 Receiver timing symmetry at 2 MBit/s ΔtRec = tBit(RxD) - tBit(Bus) ∆tRec_2MB -65 MB MB 1) Not subject to production test, specified by design. 2) In respect to common mode range. Data Sheet 23 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics 7.2 Diagrams VIO 7 100 nF CANH TxD STB CL 5 1 8 RL RxD 6 4 CRxD CANL GND VCC 3 100 nF 2 Figure 11 Test circuits for dynamic characteristics TxD 0.7 x VIO 0.3 x VIO t td(L),T td(H),T VDiff 0.9 V 0.5 V t td(L),R td(H),R tLoop(H,L) tLoop(L,H) RxD 0.7 x VIO 0.3 x VIO t Figure 12 Data Sheet Timing diagrams for dynamic characteristics 24 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Electrical characteristics TxD 0.7 x VIO 0.3 x VIO 0.3 x VIO 5 x tBit VDiff tBit t tLoop(H,L) tBit(Bus) VDiff = VCANH - VCANL 0.9 V 0.5 V t tLoop(L,H) tBit(RxD) RxD 0.7 x VIO 0.3 x VIO t Figure 13 Data Sheet “Recessive” bit time - five “dominant” bits followed by one “recessive” bit 25 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8 Application information 8.1 ESD robustness according to IEC61000-4-2 Test for ESD robustness according to IEC61000-4-2 “Gun test” (150 pF, 330 Ω) have been performed. The results and test conditions are available in a separate test report. Table 7 ESD robustness according to IEC61000-4-2 Performed Test Result Unit Remarks Electrostatic discharge voltage at pin CANH and ≥ +8 CANL versus GND kV 1) Positive pulse Electrostatic discharge voltage at pin CANH and ≤ -8 CANL versus GND kV 1) Negative pulse 1) ESD susceptibility “ESD GUN” according to GIFT / ICT paper: “EMC Evaluation of CAN Transceivers, version 03/02/IEC TS62228”, section 4.3. (DIN EN61000-4-2) Tested by external test facility (IBEE Zwickau, EMC test report no. TBD). Data Sheet 26 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8.2 Application example VBAT I Q1 22 uF TLE4476D CANH CANL EN GND 100 nF 100 nF Q2 3 VCC 22 uF 120 Ohm 100 nF VIO 5 TLE7251VLE 8 STB 7 CANH 6 1 TxD Out 4 RxD CANL optional: common mode choke VCC Out In Microcontroller e.g. XC22xx GND GND 2 I Q1 22 uF TLE4476D EN GND 100 nF Q2 3 VCC 22 uF VIO TLE7251VLE 7 6 STB CANH TxD RxD CANL optional: common mode choke Figure 14 Data Sheet 8 1 4 100 nF 100 nF VCC Out Out In Microcontroller e.g. XC22xx GND 120 Ohm CANH 5 GND 2 CANL example ECU design Application circuit 27 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8.3 Examples for mode changes Changing the status on the STB input pin triggers a change of the operating mode, disregarding the actual signal on the CANH, CANL and TxD pins (see also Chapter 4.2). Mode changes are triggered by the STB pin, when the device TLE7251V is fully supplied. Setting the STB pin to logical “low” changes the mode of operation to normal-operating mode: • The mode change is executed independently of the signal on the HS CAN bus. The CANH, CANL inputs may be either “dominant” or “recessive”. They can be also permanently shorted to GND or VCC. • A mode change is performed independently of the signal on the TxD input. The TxD input may be either logical “high” or “low”. Analog to that, changing the STB input pin to logical “high” changes the mode of operation to the stand-by mode, independent on the signals at the CANH, CANL and TxD pins. Notes 1. In case the TxD signal is “low” setting the STB input pin to logical “low” changes the operating mode of the device to normal-operating mode and drives a “dominant” signal to the HS CAN bus. 2. The TxD time-out is only effective in normal-operating mode. The TxD time-out timer starts when the TLE7251V enters normal-operating mode and the TxD input is set to logical “low”. Data Sheet 28 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8.3.1 Mode change to stand-by mode during a “dominant” bus signal The example in Figure 15 shows a mode change from normal-operating mode to stand-by mode while the signal on the HS CAN bus is “dominant”. During the mode transition time tMode, the transceiver TLE7251V blocks the RxD output and provides a logical “high” on the RxD output pin. The internal receiver switches from the normal-mode receiver to the low-power receiver, while changing from normal-operating mode to stand-by mode. After entering stand-by mode the transceiver TLE7251V continues to indicate a “high” signal on the RxD output as long as the HS CAN bus remains “dominant”. The permanent “dominant” bus signal is not considered as a wake-up event and therefore not indicated on the RxD output pin. Detecting the first signal change from “recessive” to “dominant” on the HS CAN bus releases the internal wake-up logic. Within the wake-up reaction time tWU_Rec, a “recessive” CAN bus signal is indicated on the RxD output pin by a logical “high” signal and a “dominant” CAN bus signal is indicated by a logical “low” signal, as long the pulse width of the HS CAN bus signals is longer than the CAN activity filter time t > tFilter. Entering stand-by mode while the HS CAN bus signal is “recessive”, a release of the internal wake-up logic is not necessary and a “dominant” wake-up signal (t > tFilter) on the HS CAN bus is indicated on the RxD output pin within the wake-up reaction time tWU_Rec.(compare to Figure 8). Note: The “dominant” signal on the HS CAN bus is set by another HS CAN bus subscriber. t = tMode STB t normal-operating transition stand-by mode TxD tFilter + tWU_Rec VDiff tFilter + tWU_Rec tFilter + tWU_Rec tFilter + tWU_Rec t VDiff = VCANH - VCANL 1.15V 0.4V 1.15V 0.4V t first change “recessive” to “dominant” RxD RxD “low” indicating a “dominant” bus signal Figure 15 Data Sheet RxD “high” due to the mode transition RxD “high” The low-power receiver is not detecting a wake-up as long the bus signal is permanently “dominant”. The first change from to “recessive” to “dominant” releases the wake-up logic. t RxD “low” indicating a “dominant” bus wake-up signal RxD “high” indicating a “recessive” bus wake-up signal Change to stand-by mode during bus “dominant” 29 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8.3.2 Mode changes from stand-by mode to normal-operating mode 8.3.2.1 Mode change while the TxD Signal is “low” The example in Figure 16 shows a mode change to normal-operating mode while the TxD input is logical “low”. The HS CAN signal is “recessive”, assuming all other HS CAN bus subscribers are also sending a “recessive” bus signal. While the transceiver TLE7251V is in stand-by mode, the transmitter and the normal-mode receiver are turned off. In stand-by mode the low-power receiver is active. The TLE7251V drives no signal to the HS CAN bus, the RxD output is connected to the low-power receiver and follows only the HS_CAN bus signals when its pulse width exceeds the CAN activity filter time tFilter. Changing the STB to logical “low” turns the mode of operation to normal-operating mode, while the TxD input signal remains logical “low”. The transmitter and the normalmode receiver remain disabled until the mode transition is completed. During the mode transition the RxD output is blocked and set to logical “high”. In normal-operating mode the transmitter and the normal-mode receiver are active. The “low” signal on the TxD input drives a “dominant” signal to the HS CAN bus and the RxD output becomes logical “low” following the “dominant” signal on the HS CAN bus. Changing the STB pin back to logical “high”, disables the transmitter and normal-mode receiver again. The RxD output pin is blocked and set to logical “high” with the start of the mode transition. The TxD input and the transmitter are blocked and the HS CAN bus becomes “recessive”. Note: The signals on the HS CAN bus are “recessive”, the “dominant” signal is generated by the TxD input signal t = tMode t = tMode STB t TxD t VDiff t RxD t stand-by mode transition normal-operating transition stand-by mode low-power receiver active RxD output blocked normal-mode receiver active RxD output blocked low-power receiver active TxD input and transmitter blocked Figure 16 Data Sheet TxD input and transmitter active TxD input and transmitter blocked Mode change from stand-by mode to normal-operating mode 30 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8.3.2.2 Mode change while the bus signal is “dominant” The example in Figure 17 shows a mode change while the bus is “dominant” and the TxD input signal is set to logical “high”. While the transceiver TLE7251V is in stand-by mode, the transmitter and the normal-mode receiver are turned off. In stand-by mode the low-power receiver is active. The TLE7251V drives no signal to the HS CAN bus, the RxD output is connected to the low-power receiver and follows only the HS_CAN bus signals when its pulse width exceeds the bus wake-up time tWU. Changing the STB to logical “low” turns the mode of operation to normal-operating mode, while the TxD input signal remains logical “high”. The transmitter and the normalmode receiver remain disabled until the mode transition is completed. During the mode transition the RxD output is blocked and set to logical “high”. In normal-operating mode the normal-mode receiver is active and the RxD output follows the “dominant” signal on the HS CAN bus by indicating a logical “low” signal. Changing the STB pin back to logical “high”, disables the transmitter and normal-mode receiver again. The RxD output pin is blocked and set to logical “high” with the start of the mode transition. The low-power receiver is active in stand-by mode. The RxD output signal remains “high” as long the HS CAN bus remains “dominant”, only if the HS CAN bus changes to a “recessive” signal longer as the CAN activity time tFilter, the RxD output follows the bus signal within the wake-up reaction time tWU_Rec (see also Chapter 8.3.1). Note: The “dominant” signal on the HS CAN bus is set by another HS CAN bus subscriber. t = tMode t = tMode STB t TxD t VDiff tFilter + tWU_Rec t tRxD_Rec RxD t stand-by mode transition normal-operating transition stand-by mode low-power receiver active RxD output blocked normal-mode receiver active RxD output blocked low-power receiver active TxD input and transmitter blocked Figure 17 Data Sheet TxD input & transmitter active TxD input and transmitter blocked Receiving a “dominant” signal from the bus during a mode change 31 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Application information 8.4 Further application information • Please contact us for information regarding the pin FMEA. • Existing application: www.infineon.com/TLE7251V-AN • For further information you may visit: www.infineon.com/automotive-transceivers Data Sheet 32 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Package information 9 Package information Figure 18 PG-TSON-8 (Plastic Thin Small Outline Nonleaded)1) 0.1 2) 0.41+0.1 -0.06 0.2 8 5 1 4 5 -0.2 1) M 0.19 +0.06 4 -0.2 C B 8 MAX. 1.27 1.75 MAX. 0.175 ±0.07 (1.45) 0.35 x 45˚ 1) 0.64 ±0.25 6 ±0.2 A B 8x 0.2 M C 8x A Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max. in dambar area GPS01181 Figure 19 PG-DSO-8 (Plastic Dual Small Outline)1) Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020). Further information on packages https://www.infineon.com/packages 1) Dimensions in mm Data Sheet 33 Rev. 1.01 2018-09-06 TLE7251V High Speed CAN-Transceiver with Bus Wake-up Revision history 10 Revision history Revision Date Changes 1.01 2018-09-06 Editorial changes. 1.0 2015-09-20 Data Sheet created. Data Sheet 34 Rev. 1.01 2018-09-06 Trademarks All referenced product or service names and trademarks are the property of their respective owners. Edition 2018-09-06 Published by Infineon Technologies AG 81726 Munich, Germany © 2018 Infineon Technologies AG. All Rights Reserved. Do you have a question about any aspect of this document? Email: erratum@infineon.com Document reference Z8F53239070 IMPORTANT NOTICE The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics ("Beschaffenheitsgarantie"). With respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. In addition, any information given in this document is subject to customer's compliance with its obligations stated in this document and any applicable legal requirements, norms and standards concerning customer's products and any use of the product of Infineon Technologies in customer's applications. The data contained in this document is exclusively intended for technically trained staff. It is the responsibility of customer's technical departments to evaluate the suitability of the product for the intended application and the completeness of the product information given in this document with respect to such application. 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