TLT9251VLEXUMA1

TLT9251VLE Hi gh Speed CAN FD Transceiver 1 Overview Features • Fully compliant to ISO 11898-2 (2016) and SAE J2284-4/-5 • Infineon automotive quality • AEC-Q100 Grade 0 (Ta: -40°C to +150°C) qualification for high temperature mission profiles • Guaranteed loop delay symmetry for CAN FD data frames up to 5 MBit/s • Very low electromagnetic emission (EME) allows the use without additional common mode choke • VIO input for voltage adaption to the µC interface (3.3V & 5V) • Bus Wake-up Pattern (WUP) function with optimized filter time (0.5µs -1.8µs) for worldwide OEM usage • Stand-by mode with minimized quiescent current • Transmitter supply VCC can be turned off in Stand-by Mode for additional quiescent current savings • Wake-up indication on the RxD output • Wide common mode range for electromagnetic immunity (EMI) • Excellent ESD robustness +/-8kV (HBM) and +/-11kV (IEC 61000-4-2) • Extended supply range on the VCC and VIO supply • CAN short circuit proof to ground, battery, VCC and VIO • TxD time-out function • Very low CAN bus leakage current in power-down state • Overtemperature protection • Protected against automotive transients according ISO 7637 and SAE J2962-2 standards • Green Product (RoHS compliant) • Small, leadless TSON8 package designed for automated optical inspection (AOI) PG-TSON-8 Potential applications • Car powertrain and transmission applications • Gateway Modules • Body Control Modules (BCM) • Engine Control Unit (ECUs) Datasheet www.infineon.com/automotive-transceiver 1 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Overview Product validation Qualified for automotive applications with higher temperature requirements as well as with extended lifetime requirements. Product validation according to AEC-Q100. Description Type Package Marking TLT9251VLE PG-TSON-8 T9251V The TLT9251VLE is the latest Infineon high-speed CAN transceiver generation, used inside HS CAN networks for automotive and also for industrial applications. It is designed to fulfill the requirements of ISO 11898-2 (2016) physical layer specification and respectively also the SAE standards J1939 and J2284. The TLT9251VLE is available in a small, leadless PG-TSON-8 package. The PG-TSON-8 package supports the solder joint requirements for automated optical inspection (AOI)and is RoHS compliant and halogen free. As an interface between the physical bus layer and the HS CAN protocol controller, the TLT9251VLE protects the microcontroller against interferences generated inside the network. A very high ESD robustness and the perfect RF immunity allows the use in automotive applications without adding additional protection devices, like suppressor diodes for example. While the transceiver TLT9251VLE is not supplied the bus is switched off and illustrates an ideal passive behavior with the lowest possible load to all other subscribers of the HS CAN network. Based on the high symmetry of the CANH and CANL output signals, the TLT9251VLE provides a very low level of electromagnetic emission (EME) within a wide frequency range. The TLT9251VLE fulfills even stringent EMC test limits without additional external circuit, like a common mode choke for example. The perfect transmitter symmetry combined with the optimized delay symmetry of the receiver enables the TLT9251VLE to support CAN FD data frames. Depending on the size of the network and the along coming parasitic effects the device supports bit rates up to 5 MBit/s. Dedicated low-power modes, like Stand-by mode provide very low quiescent currents while the device is powered up. In Stand-by mode the typical quiescent current on VIO is below 10 µA while the device can still be woken up by a bus signal on the HS CAN bus. Fail-safe features like overtemperature protection, output current limitation or the TxD time-out feature protect the TLT9251VLE and the external circuitry from irreparable damage. Datasheet 2 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Table of contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Potential applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 3.1 3.2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 4.1 4.2 4.3 General product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.1 High-speed CAN functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 High-speed CAN physical layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 6.1 6.2 6.3 6.4 Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normal-operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forced-receive-only mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stand-by mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power-down state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 11 11 12 12 7 7.1 7.2 7.3 7.4 Changing the mode of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power-up and power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mode change by the STB pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mode changes by VCC undervoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote wake-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 13 14 15 16 8 8.1 8.2 8.3 8.4 8.5 Fail safe functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unconnected logic pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TxD time-out function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Delay time for mode change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 18 18 18 18 19 9 9.1 9.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Functional device characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 10 10.1 10.2 10.3 10.4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESD robustness according to IEC61000-4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage adaption to the microcontroller supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Further application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Datasheet 3 6 6 7 7 26 26 26 27 27 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE 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 GND VCC/2 Low-power Receiver VIO = N.C. Bus-biasing GND 2 Figure 1 Datasheet Functional block diagram 4 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Pin configuration 3 Pin configuration 3.1 Pin assignment TxD 1 8 STB GND 2 7 CANH VCC 3 6 CANL RxD 4 5 PAD VIO (Top-side x-ray view) Figure 2 3.2 Pin configuration Pin definitions Table 1 Pin definitions and functions 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. Datasheet 5 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE General product characteristics 4 General product characteristics 4.1 Absolute maximum ratings Table 2 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_8.1.1 Digital supply voltage VIO -0.3 – 6.0 V – P_8.1.2 CANH and CANL DC voltage versus GND VCANH -40 – 40 V – P_8.1.3 Differential voltage between CANH and CANL VCAN_Diff -40 – 40 V – P_8.1.4 Voltages at the digital I/O pins: VMAX_IO1 STB, RxD, TxD -0.3 – 6.0 V – P_8.1.5 Voltages at the digital I/O pins: VMAX_IO2 STB, RxD, TxD -0.3 – VIO + 0.3 V – P_8.1.6 IRxD -5 – 5 mA – P_8.1.7 Junction temperature Tj -40 – 160 °C – P_8.1.8 Storage temperature TS -55 – 150 °C – P_8.1.9 ESD immunity at CANH, CANL VESD_HBM_CAN -8 versus GND – 8 kV HBM (100 pF via 1.5 kΩ)2) P_8.1.11 ESD immunity at all other pins VESD_HBM_ALL -2 – 2 kV HBM (100 pF via 1.5 kΩ)2) P_8.1.12 – 750 V CDM3) P_8.1.13 Currents RxD output current Temperatures ESD Resistivity ESD immunity all pins 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: Datasheet 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. 6 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE General product characteristics 4.2 Table 3 Functional range 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_8.2.1 Digital supply voltage VIO 3.0 – 5.5 V – P_8.2.2 Tj -40 – 150 °C 1) P_8.2.3 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. 4.3 Thermal resistance Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, please visit www.jedec.org. Table 4 Thermal resistance1) Parameter Symbol Values Min. Unit Note or Test Condition Number P_8.3.1 Typ. Max. 65 – K/W 2) Thermal Resistances Junction to Ambient PG-TSON-8 RthJA_TSON8 – Thermal Shutdown (junction temperature) Thermal shutdown temperature, rising TJSD 170 180 190 °C temperature P_8.3.3 falling: Min. 150°C Thermal shutdown hysteresis ∆T 5 10 20 K – P_8.3.4 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 (TLT9251VLE) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu) Datasheet 7 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE High-speed CAN functional description 5 High-speed CAN 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 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 TLT9251VLE is a high-speed CAN transceiver with a dedicated bus wake-up function as defined in the latest ISO 11898-2 HS CAN standard. 5.1 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 Datasheet tLoop(L,H) t High-speed CAN bus signals and logic signals 8 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE High-speed CAN functional description The TLT9251VLE 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 up to 5 MBit/s. The characteristic for a HS CAN network are the two signal states on the CAN bus: dominant and recessive (see Figure 3). The CANH and CANL pins are the interface to the CAN bus and both pins operate as an input and output. The RxD and TxD pins are the interface to the microcontroller. The pin TxD is the serial data input from the CAN controller, the RxD pin is the serial data output to the CAN controller. As shown in Figure 1, the HS CAN transceiver TLT9251VLE includes a receiver and a transmitter unit, allowing the transceiver to send data to the bus medium and monitor the data from the bus medium at the same time. The HS CAN transceiver TLT9251VLE converts the serial data stream which is available on the transmit data input TxD, into a differential output signal on the CAN bus, provided by the CANH and CANL pins. The receiver stage of the TLT9251VLE monitors the data on the CAN bus and converts them to a serial, single-ended signal on the RxD output pin. A logical “low” signal on the TxD pin creates a dominant signal on the CAN bus, followed by a logical “low” signal on the RxD pin (see Figure 3). The feature, broadcasting data to the CAN bus and listening to the data traffic on the CAN bus simultaneously is essential to support the bit-to-bit arbitration within CAN networks. The voltage levels for HS CAN transceivers are defined in ISO 11898-2. Whether a data bit is dominant or recessive depends on the voltage difference between the CANH and CANL pins: VDiff = VCANH - VCANL. To transmit a dominant signal to the CAN bus the amplitude of the differential signal VDiff is higher than or equal to 1.5 V. To receive a recessive signal from the CAN bus the amplitude of the differential VDiff is lower than or equal to 0.5 V. “Partially-supplied” high-speed CAN networks are those where the CAN bus nodes of one common network have different power supply conditions. Some nodes are connected to the common power supply, while other nodes are disconnected from the power supply and in power-down state. Regardless of whether the CAN bus subscriber is supplied or not, each subscriber connected to the common bus media must not interfere in the communication. The TLT9251VLE is designed to support “partially-supplied” networks. In power-down state, the receiver input resistors are switched off and the transceiver input has a high resistance. For permanently supplied ECU's, the HS CAN transceiver TLT9251VLE provides a Stand-by mode. In Stand-by mode, the power consumption of the TLT9251VLE is optimized to a minimum, while the device is still able to recognize wake-up patterns on the CAN bus and signal the wake-up event to the external microcontroller. The voltage level on the digital input TxD and the digital output RxD is determined by the power supply level at the VIO pin. Depending on the voltage level at the VIO pin, the signal levels on the logic pins (STB, TxD and RxD) are compatible with microcontrollers having a 5 V or 3.3 V I/O supply. Usually the digital power supply VIO of the transceiver is connected to the I/O power supply of the microcontroller (see Figure 18). Datasheet 9 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Modes of operation 6 Modes of operation The TLT9251VLE supports three different modes of operation (see Figure 4 and Table 5): • Normal-operating mode • Stand-by mode • Forced-receive-only mode Mode changes are either triggered by the mode selection input pin STB or by an undervoltage event on the transmitter supply VCC. Wake-up events on the HS CAN bus are indicated on the RxD output pin in Stand-by mode, but no mode change is triggered by a wake-up event. An undervoltage event on the digital supply VIO powers down the TLT9251VLE. Normal-operating mode VIO “on” VCC “on” STB “0” VCC VIO “X” “X” “off” Mode state diagram Table 5 Modes of operation VIO 0 “on” “on” VIO “on” VCC “X” STB “1” VIO “on” VCC “off” 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 Normal-operating “low” “on” “on” VCC/2 “on” “on” “off” Forced-receive-only “low” “on” “off” GND “off” “on” “off” Stand-by “high” “on” “X” GND “off” “off” “on” Power-down state “X” floating “off” “off” “off” Datasheet VIO VIO “on” VCC “on” STB “0” Forcedreceive-only mode VIO “on” VCC “off” STB “0” VIO “on” VCC “X” STB “1” Figure 4 VCC VIO “on” VCC “on” STB “0” Power-down state STB STB VCC “off” “X” Bus Bias Transmitter Normal-mode Low-power Receiver Receiver 10 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Modes of operation 6.1 Normal-operating mode In Normal-operating mode the transceiver TLT9251VLE sends and receives data from the HS CAN bus. All functions are active (see also Figure 4 and Table 5): • The transmitter is active and drives the serial data stream on the TxD input pin to the bus pins CANH and CANL. • The normal-mode receiver is active and converts the signals from the bus to a serial data stream on the RxD output. • The low-power receiver is turned off. • The RxD output pin indicates the data received by the normal-mode receiver. • The bus biasing is connected to VCC/2. • The STB input pin is active and changes the mode of operation. • The TxD time-out function is enabled and disconnects the transmitter in case a time-out is detected. • The overtemperature protection is enabled and disconnects the transmitter in case an overtemperature is detected. • The undervoltage detection on VCC is enabled and triggers a mode change to Forced-receive-only in case an undervoltage event is detected. • The undervoltage detection on VIO is enabled and powers down the device in case of detection. Normal-operating mode is entered from Stand-by mode and Forced-receive-only mode, when the STB input pin is set to logical “low”. Normal-operating mode can only be entered when all supplies are available: • The transmitter supply VCC is available (VCC > VCC(UV,R)). • The digital supply VIO is available (VIO > VIO(UV,R)). 6.2 Forced-receive-only mode The Forced-receive-only mode is a fail-safe mode of the TLT9251VLE, which will be entered when the transmitter supply VCC is not available and the STB pin is logical “low”. The following functions are available (see also Figure 4 and Table 5): • The transmitter is disabled and the data available on the TxD input is blocked. • The normal-mode receiver is enabled. • The low-power receiver is turned off. • The RxD output pin indicates the data received by the normal-mode receiver. • The bus biasing is connected to GND. • The STB input pin is active and changes the mode of operation to Stand-by mode, if logical “high”. • The TxD time-out function is disabled. • The overtemperature protection is disabled. • The undervoltage detection on VCC is active. • The undervoltage detection on VIO is enabled and powers down the device in case of detection. • Forced-receive-only mode is entered from power-down state if the STB input pin is set to logical “low” and the digital supply VIO is available (VIO > VIO(UV,R)). • Forced-receive-only mode is entered from Normal-operating mode by an undervoltage event on the transmitter supply VCC. Datasheet 11 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Modes of operation 6.3 Stand-by mode The Stand-by mode is the power save mode of the TLT9251VLE. In Stand-by mode most of the functions are turned off and the TLT9251VLE is monitoring the bus for a valid wake-up pattern (WUP). The following functions are available (see also Figure 4 and Table 5): • The transmitter is disabled and the data available on the TxD input is blocked. • The normal-mode receiver is disabled. • The low-power receiver is turned on and monitors the bus for a valid wake-up pattern (WUP). • The RxD output pin follows the Bus signal after WUP detection. • The bus biasing is connected to GND. • The STB input pin is active and changes the mode of operation. • The TxD time-out function is disabled. • The overtemperature protection is disabled. • The undervoltage detection on VCC is disabled. In Stand-by mode the device can operate without the transmitter supply VCC. • The undervoltage detection on VIO is enabled and powers down the device in case of detection. The Stand-by mode can be entered from Normal-operating mode and Forced-receive-only mode by setting the STB pin to logical “high”. To enter Stand-by mode the digital supply VIO needs to be available (VIO > VCC(UV,R)). 6.4 Power-down state Independent of the transmitter supply VCC and of the status at STB input pin the TLT9251VLE is powered down if the supply voltage VIO < VIO(UV,F) (see Figure 4). In the power-down state the differential input resistors of the receiver are switched off. The CANH and CANL bus interface of the TLT9251VLE 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. In power-down state the transceiver is an invisible node to the bus. Datasheet 12 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Changing the mode of operation 7 Changing the mode of operation 7.1 Power-up and power-down The HS CAN transceiver TLT9251VLE powers up by applying the digital supply VIO to the device (VIO > VIO(U,R)). After powering up, the device enters one out of three operating modes (see Figure 5 and Figure 6). Depending on the condition of the transmitter supply voltage VCC and the mode selection pin STB the device can enter every mode of operation after the power-up: • VCC is available and STB input is set to “low” - Normal-operating mode • VCC is disabled and the STB input is set to “low” - Forced-receive-only mode • STB input is set to “high” - Stand-by mode The device TLT9251VLE powers down when the VIO supply falls below the undervoltage detection threshold (VIO < VIO(U,F)), regardless if the transmitter supply VCC is available or not. The power-down detection is active in every mode of operation. VIO “on” VCC “on” STB “0” Normal-operating mode VIO “off” STB VCC VIO 0 “on” “on” VIO “on” VCC “off” STB “0” power-down state VIO “off” STB VCC VIO “X” “X” “off” VIO “off” Figure 5 Forcedreceive-only mode VIO “off” VIO “on” STB “1” Stand-by mode STB VCC VIO 1 “X” “on” STB VCC VIO 0 “off” “on” “blue” -> indicates the event triggering the power-up or power-down “red” -> indicates the condition which is required to reach a certain operating mode Power-up and power-down transmitter supply voltage VCC = “don’t care” VIO tPOFF VIO undervoltage monitor VIO(UV,F) hysteresis VIO(UV,H) VIO undervoltage monitor VIO(UV,R) tPON t any mode of operation Power-down state Stand-by mode STB "0" for Normal-operating mode "1" for Stand-by mode Figure 6 Datasheet 1) assuming “X” = don’t care “high” due the internal pull-up resistor1) t no external signal applied Power-up and power-down timings 13 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Changing the mode of operation 7.2 Mode change by the STB pin When the TLT9251VLE is supplied with the digital voltage VIO the internal logic works and mode change by the mode selection pin STB is possible. By default the STB input pin is logical “high” due to the internal pull-up current source to VIO. Changing the STB input pin to logical “low” in Stand-by mode triggers a mode change to Normal-operating mode (see Figure 7). To enter Normal-operating mode the transmitter supply VCC needs to be available. Stand-by mode can be entered from Normal-operating mode and Forced-receive-only mode by setting the STB pin to logical “high”. While changing the mode of operation from Normal-operating mode or Forcedreceive-only mode to Stand-by mode, the transceiver TLT9251VLE turns off the transmitter and switches from the normal-mode receiver to the low-power receiver. Entering Forced-receive-only mode from Stand-by mode is not possible by the STB pin. The device remains in Stand-by mode independently of the VCC supply voltage. Normal-operating mode STB VCC VIO 0 “on” “on” VIO “on” VCC “on” STB “0” Power-down state STB VCC VIO “X” “X” “off” VIO “on” STB “1” Datasheet STB VCC VIO 0 “off” “on” VIO “on” STB “1” Stand-by mode Figure 7 Forcedreceive-only mode STB VCC VIO 1 “X” “on” Mode selection by the STB pin 14 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Changing the mode of operation 7.3 Mode changes by VCC undervoltage When the transmitter supply VCC (VCC < VCC(U/F)) is in undervoltage condition, the TLT9251VLE might not be able to provide the correct bus levels on the CANH and CANL output pins. To avoid any interference with the network the TLT9251VLE blocks the transmitter and changes the mode of operation when an undervoltage event is detected (see Figure 8 and Figure 9). In Normal-operating mode an undervoltage event on transmitter supply VCC (VCC < VCC(U/F)) triggers a mode change to Forced-receive-only mode. In Forced-receive-only mode the undervoltage detection VCC (VCC < VCC(U/F)) is enabled. In Stand-by mode the undervoltage detection is disabled. In these modes the TLT9251VLE can operate without the transmitter supply VCC. Normal-operating mode STB VCC VIO 0 “on” “on” VIO “on” VCC “on” STB “0” VIO “on” VCC “off” STB “0” ForcedReceive-only mode power-down state STB VCC VIO STB VCC VIO “X” “X” “off” 0 “off” “on” Stand-by mode Figure 8 STB VCC VIO 1 “X” “on” Mode changes by undervoltage events on VCC digital supply voltage VIO = “on” VCC tDelay(UV)_F VCC undervoltage monitor VCC(UV,F) VCC undervoltage monitor VCC(UV,R) hysteresis VCC(UV,H) tDelay(UV)_R t Normal-operating mode Forced-receive only mode Normal-operating mode STB t Assuming the STB remains “low”, for example the STB pin is connected to GND. Figure 9 Datasheet Undervoltage on the transmitter supply VCC 15 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Changing the mode of operation 7.4 Remote wake-up The TLT9251VLE has a remote wake-up feature also called bus wake-up feature according to the ISO 11898-2 (2016). In Stand-by mode the low-power receiver monitors the activity on the CAN bus and in case it detects a wake-up pattern it indicates the wake-up signal on the RxD output pin. The low-power receiver is supplied by the digital supply VIO and therefore in Stand-by mode the transmitter supply VCC can be turned off. In Stand-by mode a wake-up event on the HS CAN is flagged on the RxD output pin (see Figure 11). The transceiver remains in the currently selected mode of operation. No mode change is applied due to the wakeup event (see Figure 10). Stand-by mode STB VCC VIO 1 “X” “on” Indication on RxD if wakeup pattern detected VIO “on” STB “1” Bus wake-up pattern Figure 10 Remote wake-up A bus wake-up is triggered by a dedicated valid wake-up pattern. The defined wake-up pattern avoids any false wake-up by spikes which might be on the HS CAN bus or by a permanent bus shortage. The internal wake-up flag will be reset when: • A mode change to Normal-operating mode is applied during the wake-up pattern. • A power-down event occurs on the digital supply VIO. Within the maximum wake-up time tWAKE, the wake-up pattern contents a dominant signal with the pulse width tFilter, followed by a recessive signal with the pulse width tFilter and another dominant signal with the pulse width tFilter (see Figure 11). The RxD output remains logical “high” as long no wake-up event has been detected. Datasheet 16 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Changing the mode of operation t < tWake VDiff VDiff_LP_D t > tFilter t > tFilter VDiff_LP_R t > tFilter tWU t RxD VIO 30% of VIO t wake-up detected Figure 11 Remote wake-up signal After a wake-up event has been detected the RxD output follows the CANH/CANL input pins. Dominant and recessive signals are indicated on the RxD output as logical “high” and “low” with the delay of tWU as long their pulse width exceeds the filter time tFilter (see also Figure 12). VDiff tWU tWU VDiff_LP_D tWU VDiff_LP_R t RxD t wake-up detected Figure 12 Datasheet RxD signal after wake-up detection 17 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Fail safe functions 8 Fail safe functions 8.1 Short circuit protection The CANH and CANL bus pins are proven to cope with a short circuit fault against GND and against the supply voltages. 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. 8.2 Unconnected logic pins All logic input pins have an internal pull-up current source to VIO. In case the VIO and VCC supply is activated and the logical pins are open, the TLT9251VLE enters into the Stand-by mode by default. 8.3 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 TLT9251VLE disables the transmitter (see Figure 13). The receiver is still active and the data on the bus continues to be monitored by the RxD output pin. TxD t t > tTxD TxD time-out CANH CANL TxD time–out released t RxD t Figure 13 TxD time-out function Figure 13 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 TLT9251VLE requires a signal change on the TxD input pin from logical “low” to logical “high”. 8.4 Overtemperature protection The TLT9251VLE has an integrated overtemperature detection to protect the TLT9251VLE against thermal overstress of the transmitter. The overtemperature protection is only active in Normal-operating mode. In Datasheet 18 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Fail safe functions case of an overtemperature condition, the temperature sensor will disable the transmitter while the transceiver remains in Normal-operating mode. After the device has cooled down the transmitter is activated again (see Figure 14). A hysteresis is implemented within the temperature sensor. TJSD (shut down temperature) TJ cool down ΔT switch-on transmitter t CANH CANL t TxD t RxD t Figure 14 8.5 Overtemperature proctection Delay time for mode change The HS CAN transceiver TLT9251VLE changes the mode of operation within the time window tMode. During the mode change from Stand-by mode to non-low power mode the RxD output pin is permanently set to logical “high” and does not reflect the status on the CANH and CANL input pins. After the mode change is completed, the transceiver TLT9251VLE releases the RxD output pin. Datasheet 19 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Electrical characteristics 9 Electrical characteristics The electrical characteristics are specified in the defined temperature range. Beyond this temperature range and below the absolute maximum rating the TLT9251VLE operates as described in the circuit description, parameter deviation is possible. 9.1 Table 6 Functional device characteristics 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, recessive state ICC_R – 2 4 mA VTxD = VIO; VSTB = 0 V; P_9.1.1 Current consumption at VCC Normal-operating mode, dominant state ICC_D – 38 48 mA VTxD = VSTB = 0 V; P_9.1.2 Current consumption at VIO Normal-operating mode IIO – – 1.5 mA VSTB = 0 V; VDiff = 0 V; VTxD = VIO; P_9.1.3 Current consumption at VCC Stand-by mode ICC(STB) – – 5 µA VTxD = VSTB = VIO; P_9.1.4 Current consumption at VIO Stand-by mode IIO(STB) – 7 15 µA VTxD = VSTB = VIO; 0 V < VCC < 5.5 V; P_9.1.5 Current consumption at VIO Stand-by mode IIO(STB)_85 – – 12 µA 1) VTxD = VSTB = VIO; TJ < 85°C; 0 V < VCC < 5.5 V; P_9.1.6 Current consumption at VCC Forced-receive-only mode ICC(FROM) – – 1 mA VTxD = VSTB = 0 V; 0 V < VCC < VCC(UV,F); VDiff = 0 V; P_9.1.10 Current consumption at VIO Forced-receive-only mode IIO(FROM) – 0.8 1.5 mA VTxD = VSTB = 0 V; 0 V < VCC < VCC(UV,F); VDiff = 0 V; P_9.1.11 VCC undervoltage monitor rising edge VCC(UV,R) 3.8 4.35 4.5 V – P_9.1.12 VCC undervoltage monitor falling edge VCC(UV,F) 3.8 4.25 4.5 V – P_9.1.13 VCC undervoltage monitor hysteresis VCC(UV,H) – 100 – mV 1) P_9.1.14 VIO undervoltage monitor rising edge VIO(UV,R) 2.0 2.55 3.0 V – P_9.1.15 Supply resets Datasheet 20 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE 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 VIO undervoltage monitor falling edge VIO(UV,F) 2.0 2.4 3.0 V – P_9.1.16 VIO undervoltage monitor hysteresis VIO(UV,H) – 150 – mV 1) P_9.1.17 VCC undervoltage delay time tDelay(UV)_F tDelay(UV)_R – – 30 100 µs 1) (see Figure 9); P_9.1.18 VIO delay time power-up tPON – – 280 µs 1) (see Figure 6); P_9.1.19 tPOFF – – 100 µs 1) (see Figure 6); P_9.1.20 “High” level output current IRxD,H – -4 -1 mA VRxD = VIO - 0.4 V; VDiff < 0.5 V; P_9.1.21 “Low” level output current IRxD,L 1 4 – mA VRxD = 0.4 V; VDiff > 0.9 V; P_9.1.22 “High” level input voltage threshold VTxD,H – 0.5 × VIO 0.7 × VIO V recessive state; P_9.1.26 “Low” level input voltage threshold VTxD,L 0.3 × VIO 0.4 × VIO – V dominant state; P_9.1.27 Input hysteresis VHYS(TxD) – 200 – mV 1) P_9.1.28 “High” level input current ITxD,H -2 – 2 µA VTxD = VIO; P_9.1.29 “Low” level input current ITxD,L -200 – -20 µA P_9.1.30 Input capacitance CTxD – – 10 pF VTxD 1) TxD permanent dominant time-out, optional tTxD 1 – 4 ms Normal-operating mode; P_9.1.32 “High” level input voltage threshold VSTB,H – 0.5 × VIO 0.7 × VIO V Stand-by mode; P_9.1.36 “Low” level input voltage threshold VSTB,L 0.3 × VIO 0.4 × VIO – V Normal-operating mode; P_9.1.37 “High” level input current ISTB,H -2 – 2 µA VSTB = VIO; P_9.1.38 “Low” level input current ISTB,L -200 – -20 µA P_9.1.39 Input hysteresis VHYS(STB) – 200 – mV VSTB 1) VIO delay time power-down Receiver output RxD Transmission input TxD = 0 V; P_9.1.31 stand-by input STB Input capacitance C(STB) – = 0 V; – 10 pF 1) – 8.0 V -12 V ≤ VCMR ≤ 12 V; P_9.1.42 P_9.1.43 P_9.1.46 Bus receiver Differential range dominant Normal-operating mode Datasheet VDiff_D_Range 0.9 21 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE 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. Differential range recessive Normal-operating mode VDiff_R_Range -3.0 Max. – 0.5 V -12 V ≤ VCMR ≤ 12 V; P_9.1.48 mV 1) P_9.1.49 30 Differential receiver hysteresis VDiff,hys Normal-operating mode Differential range threshold dominant Stand-by mode Typ. Unit Note or Test Condition VDiff_D_STB_R 1.15 Number – 8.0 V -12 V ≤ VCMR ≤ 12 V; P_9.1.50 – 0.4 V -12 V ≤ VCMR ≤ 12 V; P_9.1.51 ange VDiff_R_STB_R -3.0 Differential range recessive Stand-by mode ange Common mode range CMR -12 – 12 V – P_9.1.52 Single ended internal resistance RCAN_H, RCAN_L 6 – 50 kΩ recessive state; -2 V ≤ VCANH ≤ 7 V; -2 V ≤ VCANL ≤ 7 V; P_9.1.53 Differential internal resistance RDiff 12 – 100 kΩ recessive state; -2 V ≤ VCANH ≤ 7 V; -2 V ≤ VCANL ≤ 7 V; P_9.1.54 Input resistance deviation between CANH and CANL ∆Ri -3 – 3 % 1) recessive state; VCANH = VCANL = 5 V; P_9.1.55 Input capacitance CANH, CANL versus GND CIn – 20 40 pF 2) recessive state P_9.1.56 – 10 20 pF 2) recessive state P_9.1.57 2.0 2.5 3.0 V VTxD = VIO; no load; P_9.1.58 Differential input capacitance CInDiff Bus transmitter CANL, CANH recessive output voltage Normal-operating mode VCANL,H CANH, CANL recessive output voltage difference Normal-operating mode VDiff_R_NM = -50 VCANH VCANL – 50 mV VTxD = VIO; no load; P_9.1.59 CANL dominant output voltage Normal-operating mode VCANL 0.5 – 2.25 V VTxD = 0 V; 50 Ω < RL < 65 Ω; 4.75 V < VCC < 5.25 V; P_9.1.60 CANH dominant output voltage Normal-operating mode VCANH 2.75 – 4.5 V VTxD = 0 V; 50 Ω < RL < 65 Ω; 4.75 V < VCC < 5.25 V; P_9.1.61 Differential voltage dominant VDiff_D_NM Normal-operating mode VDiff = VCANH - VCANL 1.5 2.0 2.5 V VTxD = 0 V; 50 Ω < RL < 65 Ω; 4.75 V < VCC < 5.25 V; P_9.1.62 Differential voltage dominant VDiff_EXT_BL extended bus load Normal-operating mode 1.4 2.0 3.3 V VTxD = 0 V; 45 Ω < RL < 70 Ω; 4.75 V < VCC < 5.25 V; P_9.1.63 Datasheet 22 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE 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 Typ. Max. Unit Note or Test Condition Differential voltage dominant VDiff_HEXT_BL 1.5 high extended bus load Normal-operating mode – 5.0 V VTxD = 0 V; RL = 2240 Ω; 4.75 V < VCC < 5.25 V; static behavior;1) P_9.1.64 CANH, CANL recessive output voltage difference Stand-by mode VDiff_STB -0.2 – 0.2 V no load; P_9.1.65 CANL, CANH recessive output voltage Stand-by mode VCANL,H -0.1 – 0.1 V no load; P_9.1.66 Driver symmetry (VSYM = VCANH + VCANL) VSYM 0.9 × VCC 1.0 × VCC 1.1 × VCC V 1) 3) P_9.1.67 CANL short circuit current ICANLsc 40 75 115 mA VCANLshort = 18 V; t < tTxD; VTxD = 0 V; P_9.1.68 CANH short circuit current ICANHsc -115 -75 -40 mA VCANHshort = -3 V; t < tTxD; VTxD = 0 V; P_9.1.70 Leakage current, CANH ICANH,lk -5 – 5 µA VCC = VIO = 0 V; 0 V < VCANH ≤ 5 V; VCANH = VCANL; P_9.1.71 Leakage current, CANL ICANL,lk -5 – 5 µA VCC = VIO = 0 V; 0 V < VCANL ≤ 5 V; VCANH = VCANL; P_9.1.72 CANH, CANL output voltage difference slope, recessive to dominant Vdiff_slope_rd – – 70 V/µs 1) 30 % to 70 % of measured differential bus voltage; C2 = 100 pF; RL = 60 Ω; 4.75 V < VCC < 5.25 V; P_9.1.190 CANH, CANL output voltage Vdiff_slope_dr – difference slope, dominant to recessive – 70 V/µs 1) 70 % to 30 % of measured differential bus voltage; C2 = 100 pF; RL = 60 Ω; 4.75 V < VCC < 5.25 V; P_9.1.191 – 215 ns C1 = 0 pF; C2 = 100 pF; CRxD = 15 pF; (see Figure 16) P_9.1.73 Min. C1 = 4.7 nF; Number Dynamic CAN-transceiver characteristics Propagation delay TxD-to-RxD Datasheet tLoop 80 23 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE 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 Min. Typ. Max. Unit Note or Test Condition tLoop_150 80 – 330 ns 1) C1 = 0 pF; C2 = 100 pF; CRxD = 15 pF; RL = 150 Ω; P_9.1.74 Delay time for mode change tMode – – 20 µs 1) P_9.1.79 CAN activity filter time tFilter 0.5 – 1.8 µs 1) (see Figure 11); P_9.1.81 (see Figure 11); P_9.1.82 Propagation delay increased load TxD-to-RxD Symbol Values Number Delay Times Bus wake-up time-out tWake 0.8 – 10 ms 1) Bus wake-up delay time tWU – – 5 µs (see Figure 11); P_9.1.83 Received recessive bit width at 2 MBit/s tBit(RxD)_2M 400 500 550 ns C2 = 100 pF; CRxD = 15 pF; tBit = 500 ns; (see Figure 17); P_9.1.84 Received recessive bit width at 5 MBit/s tBit(RxD)_5M 120 200 220 ns C2 = 100 pF; CRxD = 15 pF; tBit = 200 ns; (see Figure 17); P_9.1.85 Transmitted recessive bit width at 2 MBit/s tBit(Bus)_2M 435 500 530 ns C2 = 100 pF; CRxD = 15 pF; tBit = 500 ns; (see Figure 17); P_9.1.86 Transmitted recessive bit width at 5 MBit/s tBit(Bus)_5M 155 200 210 ns C2 = 100 pF; CRxD = 15 pF; tBit = 200 ns; (see Figure 17); P_9.1.87 Receiver timing symmetry at ∆tRec_2M 2 MBit/s ∆tRec_2M = tBit(RxD)_2M - tBit(Bus)_2M -65 – 40 ns C2 = 100 pF; CRxD = 15 pF; tBit = 500 ns; (see Figure 17); P_9.1.88 Receiver timing symmetry at ∆tRec_5M 5 MBit/s ∆tRec_5M = tBit(RxD)_5M - tBit(Bus)_5M -45 – 15 ns C2 = 100 pF; CRxD = 15 pF; tBit = 200 ns; (see Figure 17); P_9.1.89 CAN FD characteristics 1) Not subject to production test, specified by design 2) Not subject to production test, specified by design, S2P-Method; f = 10 MHz 3) VSYM shall be observed during dominant and recessive state and also during the transition from dominant to recessive and vice versa, while TxD is stimulated by a square wave signal with a frequency of 1 MHz. Datasheet 24 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Electrical characteristics 9.2 Diagrams VIO 7 CANH TxD RL/2 STB C2 5 100 nF 1 8 TLT9251V C1 RxD 4 RL/2 6 CRxD CANL VCC GND 3 100 nF 2 Figure 15 Test circuit for dynamic characteristics TxD 0.7 x VIO 0.3 x VIO t VDiff t tLoop(H,L) tLoop(L,H) RxD 0.7 x VIO 0.3 x VIO t Figure 16 Timing diagrams for dynamic 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 17 Datasheet Recessive bit time for five dominant bits followed by one recessive bit 25 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Application information 10 Application information 10.1 ESD robustness according to IEC61000-4-2 Tests 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 Electrostatic discharge voltage at pin CANH and CANL versus GND ≥ +11 Electrostatic discharge voltage at pin CANH and CANL versus GND ≤ -11 Unit Remarks kV 1) Positive pulse kV 1) Negative pulse 1) Not subject to production test. ESD susceptibility “ESD GUN” according to GIFT / ICT paper: “EMC Evaluation of CAN Transceivers, version IEC TS62228”, section 4.3. (DIN EN61000-4-2) Tested by external test facility (IBEE Zwickau) 10.2 Application example VBAT I Q1 22 μF TLE4476D CANH CANL EN GND 100 nF 100 nF Q2 3 VCC 22 μF 120 Ohm VIO TLT9251V 7 6 STB CANH TxD RxD CANL 100 nF 5 8 Out 1 Out 4 In VCC Microcontroller e.g. XC22xx GND GND 2 I Q1 22 μF TLE4476D EN GND 100 nF Q2 3 VCC 22 μF VIO TLT9251V 7 6 STB CANH TxD RxD CANL 5 8 1 4 100 nF 100 nF Out Out In VCC Microcontroller e.g. XC22xx GND 120 Ohm CANH Figure 18 Datasheet CANL GND 2 example ECU design Application circuit 26 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Application information 10.3 Voltage adaption to the microcontroller supply To adapt the digital input and output levels of the TLT9251VLE to the I/O levels of the microcontroller, connect the power supply pin VIO to the microcontroller voltage supply (see Figure 18). Note: In case no dedicated digital supply voltage VIO is required in the application, connect the digital supply voltage VIO to the transmitter supply VCC. 10.4 Further application information • For further information you may visit: http://www.infineon.com/automotive-transceiver Datasheet 27 Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Package outline 11 Figure 19 Package outline PG-TSON-8 (Plastic Thin Small Outline Nonleaded) 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). For further information on alternative packages, please visit our website: http://www.infineon.com/packages. Datasheet 28 Dimensions in mm Rev. 1.0 2019-10-08 High Speed CAN FD Transceiver TLT9251VLE Revision history 12 Revision history Revision Date Changes 1.0 2019-10-08 Initial datasheet Datasheet 29 Rev. 1.0 2019-10-08 Trademarks All referenced product or service names and trademarks are the property of their respective owners. Edition 2019-10-08 Published by Infineon Technologies AG 81726 Munich, Germany © 2019 Infineon Technologies AG. All Rights Reserved. Do you have a question about any aspect of this document? Email: erratum@infineon.com Document reference Z8F66182058 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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