IFX1021SJXUMA1

IFX1021SJ LIN Transceiver Data Sheet Rev. 1.0, 2011-09-20 Standard Power IFX1021SJ Table of Contents Table of Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 3.1 3.2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 4.1 4.2 4.2.1 4.2.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Normal Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Normal Slope Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Flash Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Stand-By Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Wake-Up Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Bus Wake-Up via LIN bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Local Wake-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Mode Transition via EN pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 TxD Time Out function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Over Temperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.3 V and 5 V Logic Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 BUS Short to GND Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 LIN Specifications 1.2, 1.3, 2.0 and 2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5 5.1 5.2 5.3 General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6.1 6.2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Functional Device Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 7.1 7.2 7.3 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Master Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Data Sheet 2 17 17 18 18 25 25 25 26 Rev. 1.0, 2011-09-20 LIN Transceiver 1 IFX1021SJ Overview Features • • • • • • • • • • • • • • Single-wire transceiver Transmission rate up to 20 kBaud Compliant to LIN specification 1.3, 2.0 and 2.1 Very high ESD robustness of 6 kV (HBM) Optimized for low electromagnetic emission (EME) Optimized for high immunity against electromagnetic interference (EMI) Very low current consumption in sleep mode with Wake-Up functions Wake-Up source detection Very low leakage current on the BUS output Digital I/O levels compatible for 3.3 V and 5 V microcontrollers Bus short to VS protection and Bus short to GND handling Over temperature protection and Under voltage detection Flash mode Green Product (RoHS compliant) PG-DSO-8 For automotive applications please refer to the Infineon TLE- series of transceiver products. Description The IFX1021SJ is a transceiver for the Local Interconnect Network (LIN) with integrated Wake-Up and protection features. It is designed for data transmission rates from 2.4 kBaud to 20 kBaud. The IFX1021SJ serves as a bus driver between the protocol controller and the physical bus inside the LIN network. The IFX1021SJ is compliant to all LIN standards and offers a wide operational supply range up to 40V. Different operation modes and the INH output allow the IFX1021SJ to control external components like e.g. voltage regulators. In Sleep-mode the IFX1021SJ draws less than 8 μA of quiescent current while still being capable of “wake up” by LIN bus traffic and a local Wake-Up input. The very low leakage current on the BUS pin makes the IFX1021SJ especially suitable for partially supplied networks and supports the low quiescent current requirements of the LIN network. The IFX1021SJ provides excellent ESD Robustness combined with a very high electromagnetic immunity (EMI) and it reaches a very low level of electromagnetic emission (EME) within a broad frequency range.It is moreover tailored to withstand harsh operating conditions. Type Package Marking IFX1021SJ PG-DSO-8 1021SJ Data Sheet 3 Rev. 1.0, 2011-09-20 IFX1021SJ Block Diagram 2 Block Diagram VS 8 7 Supply Output Stage RBUS Bus 6 Driver INH 5V 2 Mode Control Temp.Protection Current Limit EN REN TxD Input 4 Timeout Receiver TxD RTD 1 RxD Filter Wake and Bus Comparator WK 3 Figure 1 Data Sheet 5 GND Filter Block Diagram 4 Rev. 1.0, 2011-09-20 IFX1021SJ Pin Configuration 3 Pin Configuration 3.1 Pin Assignment RxD 1 8 INH EN 2 7 VS WK 3 6 BUS TxD 4 5 GND Figure 2 Pin Configuration IFX1021SJ 3.2 Pin Definitions and Functions Pin Symbol Function 1 RxD Receive data output; External Pull Up necessary LOW in dominant state, active LOW after a Wake-Up event at BUS or WK pin 2 EN Enable input; integrated pull-down, device set to normal operation mode when HIGH 3 WK Wake input; active LOW, negative edge triggered, internal pull-up 4 TxD Transmit data input; integrated pull-down, LOW in dominant state; active LOW after Wake-Up via WK pin 5 GND Ground 6 BUS Bus input / output; LIN bus line input / output LOW in dominant state Internal termination and pull-up current source Data Sheet 5 Rev. 1.0, 2011-09-20 IFX1021SJ Pin Configuration Pin Symbol Function 7 VS Supply input (e.g. battery, ACDC, DCDC, etc) 8 INH Inhibit output; VS related output HIGH (VS) in Normal and Stand-By operation mode can be used to control an external voltage regulator can be used to control external bus termination resistor when the device will be used as Master node. For further details please see also “BUS Short to GND Feature” on Page 15 Data Sheet 6 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description 4 Functional Description The LIN Bus is a bi-directional single wire bus. The LIN Transceiver IFX1021SJ is the interface between the microcontroller and the physical LIN Bus (see Figure 14 and Figure 15). The logical values of the microcontroller are driven to the LIN bus via the TxD input of the IFX1021SJ. The transmit data stream on the TxD input is converted to a LIN bus signal with optimized slew rate to minimize the EME level of the LIN network. The RxD output reads back the information from the LIN bus to the microcontroller. The receiver has an integrated filter network to suppress noise on the LIN Bus and to increase the EMI (Electro Magnetic Immunity) level of the transceiver. Two logical states are possible on the LIN bus according to the LIN Specification 2.1 (see Figure 3): In dominant state, the voltage on the LIN bus is set to the GND level. In recessive state, the voltage on the LIN bus is set to the supply voltage VS. By setting the TxD input of the IFX1021SJ to “Low” the transceiver generates a dominant level on the BUS interface pin. The RxD output reads back the signal on the LIN bus and indicates a dominant LIN bus signal with a logical “Low” to the microcontroller. Setting the TxD pin to “High” the transceiver IFX1021SJ sets the LIN interface pin BUS to the recessive level, at the same time the recessive level on the LIN bus is indicated by a logical “High” on the RxD output. Every LIN network consists of a master node and one or more slave nodes. To configure the IFX1021SJ for master node applications, a resistor in the range of 1 kΩ and a reverse diode must be connected between the LIN bus and the power supply VS or the INH pin of the IFX1021SJ (see Figure 14 and Figure 15). VIO Recessive Dominant Recessive TxD t VS Recessive Dominant Recessive BUS t VIO Recessive Dominant Recessive RxD t Figure 3 Data Sheet LIN bus signals 7 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description 4.1 Operating Modes Start-Up Power-Up Note 1: TxD: TxD: Note 2: RxD: Strong Pull Down > 1.5 mA after Wake-Up via pin WK Weak Pull Down 350 kΩ after Power-Up and Wake-Up via BUS RxD: Stand-By Mode logical „High“ after Power-Up logical „Low“ after Wake-Up via BUS or after Wake-Up via pin WK A external Pull-Up resistor to the external microcontroller supply is required for the Wake-Up or Power-Up indication INH = HIGH TxD (see Note 1) RxD (see Note 2) EN Go To Normal Operation Mode EN High Normal Operation Mode Normal Slope Mode Flash Mode EN INH = HIGH EN = HIGH TxD EN INH = HIGH EN = HIGH EN Go To Sleep Mode EN Low Sleep Mode 1) INH = Float EN = LOW RxD = HIGH1) EN Wake-Up via via Figure 4 Data Sheet RxD is „High“ due to the external pullup resistor on pin Wk on pin BUS Operation Mode State Diagram 8 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description The IFX1021SJ has 3 major operation modes: • • • Stand-By mode Normal Operation mode Sleep mode The Normal Operation mode contains 2 sub-operation modes, which differentiate by the slew rate control of the LIN Bus signal (see Figure 4). Sub-operation modes with different slew rates on the BUS pin: • • Normal Slope mode, for data transmission rates up to 20 kBaud Flash mode, for programming of the external microcontroller The operation mode of the IFX1021SJ is selected by the EN pin. (see Figure 4). Table 1 Operating modes Mode EN INH Sleep Low Stand-By TxD RxD LIN Bus Comments Termination Floating Low High1) High Impedance No wake-up request detected Low High Low High2) Low High 1) 30 kΩ (typical) RxD “Low” after local Wake-Up (pin WK) or bus Wake-Up (pin BUS) RxD “High“ after Power-Up TxD strong pull down after local Wake-Up (WK pin)2) TxD weak pull down after bus Wake-Up (pin BUS) or Power-Up2) Normal High Operation High Low High Low High 30 kΩ (typical) RxD reflects the signal on the BUS TxD driven by the microcontroller 1) A pull-up resistor to the external microcontroller supply is required. 2) The TxD input needs an external termination to indicate a “High” or a “Low” signal. The external termination could be a pullup resistor or an active microcontroller output. 4.2 Normal Operation Mode The IFX1021SJ enters the Normal Operation mode after the microcontroller sets EN to “High” (see Figure 4). In Normal Operation mode the LIN bus receiver and the LIN bus transmitter are active. Data from the microcontroller is transmitted to the LIN bus via the TxD pin, the receiver detects the data stream on the LIN bus and forwards it to the RxD output pin. In Normal Operation mode, the INH pin is “High” (set to VS) and the bus termination is set to 30 kΩ. Normal Slope mode and the Flash mode are Normal Operation modes and in these sub-modes the behavior of the INH pin and the bus termination is the same. Per default the IFX1021SJ always enters into Normal Slope mode, either from Sleep mode or from Stand-By mode. The Flash mode can only be entered from Normal Slope mode. In order to avoid any bus disturbance during a mode change, the output stage of the IFX1021SJ is disabled and set to recessive state during the mode change procedure. To release the IFX1021SJ for data communication on the LIN bus, the TxD pin needs to be set to “High” for the time tto,rec. Data Sheet 9 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description 4.2.1 Normal Slope Mode In Normal Slope mode data transmission rates up to 20 kBauds are possible. Setting the EN pin to “High” starts the transition to Normal Slope mode. (see Figure 5). The mode change to Normal Slope mode is defined by the time tMODE. The time tMODE specifies the delay time between the threshold, where the EN pin detects a “High” input signal, and the actual mode change of IFX1021SJ into Normal Slope mode. Entering in Normal Operation mode, the IFX1021SJ always enters per default into Normal Slope mode. The signal on the TxD pin is not relevant for entering into Normal Slope mode. Finally to release the data communication it is required to set the TxD pin to “High” for the time tto,rec. VEN,ON EN Don’t care Data transmission TxD tto,rec tMODE Stand-By Mode / Sleep Mode Figure 5 Normal Slope Mode Timing to enter Normal Slope Mode . 4.2.2 Flash Mode In Flash mode it is possible to transmit and receive LIN messages on the LIN bus. The slew rate control mechanism of the LIN bus signal is disabled. This allows higher data transmission rates, disregarding the EMC limitations of the LIN network. The Flash mode is intended to be used during the ECU production for programming the microcontroller via the LIN bus interface. The IFX1021SJ can be set to Flash mode only from Normal Slope mode (see Figure 4). Flash mode is entered by setting the EN pin to “Low” for the time tfl1 and generating a falling and a rising edge at the TxD pin with the timing tfl2, tfl3 and tfl4 (see Figure 6). Leaving the Flash mode by the same sequence, sets the IFX1021SJ back to Normal Slope mode. Finally to release the data transmission it is required to set the TxD pin to “High” for the time tto,rec. Additionally the IFX1021SJ can leave the Flash mode as well by switching only the EN pin to “Low”. By applying this “Low” signal to the EN pin the IFX1021SJ is put into Sleep mode. Data Sheet 10 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description Normal Slope Mode Normal Slope Mode Flash Mode tfl1 EN tfl1 Data transmission TxD tfl2 tfl3 tfl4 tfl2 ttorec Figure 6 Timing to enter and leave Flash Mode 4.3 Stand-By Mode Data transm. tfl3 tfl4 ttorec The Stand-By mode is entered automatically after: • • • • • A Power-Up event at the supply VS. A bus Wake-Up event at the pin BUS. A local Wake-Up event at the pin WK. A power on reset caused by power supply VS In Stand-By mode the Wake-Up sources are monitored by the TxD and RxD pins. In Stand-By mode no communication on the LIN Bus is possible. The output stage is disabled and the LIN Bus termination remains activated. The RxD and the TxD pin are used to indicate the Wake-Up source or a Power-Up event. The RxD pin remains “Low“ after a local Wake-Up event on the pin WK and a bus Wake-Up event on the LIN bus. A Power-Up event is indicated by a logical “High“ on the RxD pin. The signal on the TxD pin indicates the Wake-Up source, a weak pull-down signals a bus Wake-Up event on the LIN bus and a strong pull-down signals a local Wake-Up event caused by the WK pin (see Table 1 and Table 2). In order to detect a Wake-Up event via the TxD pin, the external microcontroller output needs to provide a logical “High” signal. The Wake-Up flags indicating the Wake-Up source on the pins TxD and RxD are reset by changing the operation mode to Normal Operation mode. The signal on the EN pin remains “Low“ due to an internal pull-down resistor. Setting the EN pin to “High“, by the microcontroller returns the IFX1021SJ to Normal Operation mode. In Stand-By mode the INH output is switching to VS. The INH output can be used to control external devices like a voltage regulator. Table 2 Logic table for wake up monitoring power up WK BUS RxD1) TxD2) Remarks Yes 1 1 1 1 No Wake-Up, Power-Up event No Wake- 1 Up3) 0 0 Wake via wake pin No 1 0 1 Wake via BUS WakeUp4) 1) To indicate the Wake-Up sources via the RxD pin, a pull-up resistor to the external microcontroller supply is required. 2) The TxD input needs an external termination to indicate a “High” or a “Low” signal. The external termination could be a pull-up resistor or an active microcontroller output. 3) A local Wake-Up event is considered after a low signal on the pin WK (see Chapter 4.7). 4) A bus Wake-Up event is considered after a low to high transition on the LIN bus (see Chapter 4.6) Data Sheet 11 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description 4.4 Sleep Mode In order to reduce the current consumption the IFX1021SJ offers a Sleep mode. In Sleep mode the quiescent current on VS and the leakage current on the pin BUS are cut back to a minimum. To switch the IFX1021SJ from Normal Operation mode to Sleep mode, the EN pin has to be set to “Low”. Conversely a logical “High” on the EN pin sets the device directly back to Normal Operation mode (see Figure 4). While the IFX1021SJ is in Sleep mode the following functions are available: • • • • • • • The output stage is disabled and the internal bus terminations are switched off (High Impedance on the pin BUS). The internal current source on the bus pin ensures that the level on the pin BUS remains recessive and protects the LIN network against accidental bus Wake-Up events. The receiver stage is turned off. RxD output pin is “High” if a pull-up resistor is connected to the external microcontroller supply. The TxD pin is disabled. The logical state on the TxD pin is “Low”, due to the internal pull-down resistor. The INH output is switched off and floating. The bus Wake-Up comparator is active and turns the IFX1021SJ to Stand-By mode in case of a bus Wake-Up event. The WK pin is active and turns the IFX1021SJ to Stand-By mode in case of a local Wake-Up. The EN pin remains active, switching the EN pin to “High“ changes the operation mode to Normal Slope mode. 4.5 Wake-Up Events A Wake-Up event changes the operation mode of the IFX1021SJ from Sleep mode to Stand-By mode. There are 3 different ways to wake-up the IFX1021SJ from Sleep mode. • • • Bus Wake-Up via a minimum dominant signal (tWK,bus) on the pin BUS. Local Wake-Up via a minimum dominant time (tWK) on the WK pin. Mode change from Sleep mode to Normal Operation mode, by setting the EN pin to logical “High”. 4.6 Bus Wake-Up via LIN bus LIN BUS Signal VBUS VBUS,wk VBUS,dom tWK,bus Sleep Mode Stand-By Mode INH Figure 7 Data Sheet Bus Wake-Up behavior 12 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description The bus Wake-Up event, often called remote Wake-Up, changes the operation mode from Sleep mode to StandBy mode. A falling edge on the LIN bus, followed by a dominant bus signal t > tWK,bus results in a bus Wake-Up event. The mode change to Stand-By mode becomes active with the following rising edge on the LIN bus. The IFX1021SJ remains in Sleep mode until it detects a change from dominant to recessive on the LIN bus (see Figure 7). In Stand-By mode the TxD pin indicates the source of the Wake-Up event. A weak pull-down on the pin TxD indicates a bus Wake-Up event (see Figure 4). The RxD pin signals if a Wake-Up event occurred or the powerup event. A “Low” signal on the RxD pin reports a local or bus Wake-Up event, a logical “High“ signal on RxD indicates a power-up event. 4.7 Local Wake-Up WK Signal VWK VWK,L tWK Stand-By Mode Sleep Mode INH Figure 8 Local Wake-Up behavior Beside the remote Wake-Up, a Wake-Up of the IFX1021SJ via the WK pin is possible. This type of wake-up event is called “Local Wake Up”. A falling edge on the WK pin followed by a “Low“ signal for t > tWK results in a local Wake-Up (see Figure 8) and changes the operation mode to Stand-By mode. In Stand-By mode the TxD pin indicates the source of the Wake-Up event. A strong pull-down on the pin TxD indicates a bus Wake-Up event (see Figure 4). The RxD pin signals if a Wake-Up event or the Power-Up event occurred. A “Low” signal on the RxD pin reports a local or bus Wake-Up event, a logical “High“ signal on RxD indicates a Power-Up event. Data Sheet 13 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description 4.8 Mode Transition via EN pin EN Signal VEN VEN,ON EN Hysteresis VEN,OFF tMODE Sleep Mode / Stand-By Mode Figure 9 tMODE Normal Operation Mode Sleep Mode Mode Transition via EN pin It is also possible to change from Sleep mode to Normal Operation mode by setting the EN pin to logical “High“. This feature is useful if the external microcontroller is continuously powered, the microcontroller power-supply is not controlled by the INH pin. The EN pin has an integrated pull-down resistor to ensure the device remains in Sleep or Stand-By mode even if the voltage on the EN pin is floating. The EN pin has an integrated hysteresis (see Figure 9). A transition from logical “High“ to logical “Low“ on the EN pin changes the operation mode from Normal Operation mode to Sleep mode. If the IFX1021SJ is already in Sleep mode, changing the EN from “Low“ to “High” results into a mode change from Sleep mode to Normal Operation mode. If the device is in Stand-By mode a change from “Low“ to “High” on the EN pin changes the mode to Normal Operation mode, as well (see Figure 4). Data Sheet 14 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description 4.9 TxD Time Out function If the TxD signal is dominant for a time t > ttimeout the TxD time-out function deactivates the transmission of the LIN signal to the bus and disables the output stage. This is realized to prevent the bus from being blocked by a permanent “Low” signal on the TxD pin, caused by an error on the external microcontroller (see Figure 10). The transmission is released again, after a rising edge at the pin TxD has been detected. Recovery of the microcontroller error TxD Time-Out due to microcontroller error Normal Communication ttimeout ttorec Release after TxD Time-out Normal Communication TxD t BUS t Figure 10 TxD Time-Out function 4.10 Over Temperature protection The IFX1021SJ has an integrated over temperature sensor to protect the device against thermal overstress on the output stage. In case of an over temperature event, the temperature sensor will disable the output stage (see Figure 1). An over temperature event will not cause any mode change and won’t be indicated by the RxD pin or the TxD pin. When the junction temperature falls below the thermal shut down level TJ < TjSD, the output stage is re-enabled and data communication can start again on the LIN bus. A 10°C hysteresis avoids toggling during the temperature shut down. 4.11 3.3 V and 5 V Logic Capability The IFX1021SJ can be used for 3.3 V and 5 V microcontrollers. The inputs and the outputs are capable to operate with both voltage levels. The RxD output must have an external pull-up resistor to the microcontroller supply to define the output voltage level. 4.12 BUS Short to GND Feature In case the LIN bus is shorted to GND (i.e. causing a permanent dominant state on the bus) a continuous current would flow via the termination paths of the LIN devices. For the slaves this path is the internal 30 kΩ termination while for the master it is the internal 30 kΩ path as well as the 1 kΩ master termination. The IFX1021SJ allows to reduce the short-circuit current in such a failure state to a minimum: Once the microcontroller has detected the bus short by monitoring a continuous dominant level on RxD, it simply needs to put the IFX1021SJ in Sleep Mode. In this Mode the internal 30 kΩ termination is switched off from VS Data Sheet 15 Rev. 1.0, 2011-09-20 IFX1021SJ Functional Description and only a weak pull-up current source remains active. In addition the IFX1021SJ offers with its “Bus Short to GND feature” the possibility to also switch off the master termination from VS. To use this feature the master termination of the LIN bus must be connected to the INH pin of the IFX1021SJ instead of connecting it directly to VS (see Figure 14 and Figure 15). The INH pin of the IFX1021SJ can drive VS as an output that is switched off during Sleep Mode. In this configuration the master termination also will be switched off in Sleep Mode and the failure current can be reduced to a minimum. This feature is of special interest for battery operated systems where battery discharge during sleep mode might be critical. 4.13 LIN Specifications 1.2, 1.3, 2.0 and 2.1 The device fulfills the Physical Layer Specification of LIN 1.2, 1.3, 2.0 and 2.1. The differences between LIN specification 1.2 and 1.3 is mainly the physical layer specification. The reason was to improve the compatibility between the nodes. The LIN specification 2.0 is a super set of the 1.3 version. The 2.0 version offers new features. However, it is possible to use the LIN 1.3 slave node in a 2.0 node cluster, as long as the new features are not used. Vice versa it is possible to use a LIN 2.0 node in the 1.3 cluster without using the new features. In terms of the physical layer the LIN 2.1 Specification doesn’t include any changes and is fully compliant to the LIN Specification 2.0. LIN 2.1 is the latest version of the LIN specification, released in December 2006. Data Sheet 16 Rev. 1.0, 2011-09-20 IFX1021SJ General Product Characteristics 5 General Product Characteristics 5.1 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) Pos. Parameter Symbol Limit Values Min. Max. Unit Remarks LIN Spec 2.1 Param. 10 Voltages 5.1.1 Supply voltage VS -0.3 40 V 5.1.2 Bus and WK input voltage versus GND versus VS VBUS,G VBUS,Vs -40 -40 40 40 V V -0.3 5.5 V VINH,G VINH, Vs -0.3 -40 40 0.3 V V IINH -150 80 mA 2) – 5.1.3 Logic voltages at EN, TxD, Vlogic RxD 5.1.4 INH Voltage versus GND versus VS – – Currents 5.1.5 Output current at INH Temperatures 5.1.6 Junction temperature Tj -40 150 °C – 5.1.7 Storage temperature Ts -55 150 °C – ESD Resistivity 5.1.8 Electrostatic discharge voltage at VS, Bus, WK versus GND VESD -6 6 kV Human Body Model (100pF via 1.5 kΩ)3) 5.1.9 Electrostatic discharge voltage all pins VESD -2 2 kV Human Body Model (100pF via 1.5 kΩ)3) 1) Not subject to production test, specified by design 2) Output current is internally limited to -150 mA 3) ESD susceptibility HBM according to EIA / JESD 22-A 114 Note: 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. Note: 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 continuous repetitive operation. Data Sheet 17 Rev. 1.0, 2011-09-20 IFX1021SJ General Product Characteristics 5.2 Functional Range Table 4 Operating Range Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Remarks Supply voltages 5.2.1 Extended Supply Voltage VS(ext) Range for Operation 5 – 40 V Parameter deviations possible 5.2.2 Supply Voltage range for VS(nor) Normal Operation 7 – 27 V LIN Spec 2.1 Param. 10 -40 – 125 °C 1) Thermal parameters 5.2.3 Junction temperature Tj 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. 5.3 Thermal Characteristics Table 5 Thermal Resistance1) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Remarks Thermal Resistance 5.3.1 Junction to Soldering Point RthJSP – – 25 K/W measured on pin 5 5.3.2 Junction ambient RthJA – 130 – K/W 2) Thermal Shutdown Junction Temperature 5.3.3 Thermal shutdown temp. TjSD 150 175 190 °C – 5.3.4 Thermal shutdown hyst. ΔT – 10 – K – 1) Not subject to production test, specified by design 2) JESD 51-2, 51-3, FR4 76,2 mm x 114,3 mm x 1,5 mm, 70 μm Cu, minimal footprint, Ta = 27°C Data Sheet 18 Rev. 1.0, 2011-09-20 IFX1021SJ Electrical Characteristics 6 Electrical Characteristics 6.1 Functional Device Characteristics Table 6 Electrical Characteristics 7.0 V < VS < 27 V; RBUS = 500 Ω; -40 °C < Tj < 125 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. Current Consumption 6.1.1 Current consumption at VS IS,rec 0.5 1.1 3.0 mA Recessive state, without RL; VS = 13.5 V; VTxD = “High” 6.1.2 Current consumption at VS Dominate State IS,dom – 1.5 5.0 mA Dominant state, without RL; VS = 13.5 V; VTxD = 0 V 6.1.3 Current consumption at VS in sleep mode IS,sleep – 5 12 µA Sleep mode. VS = 18 V; VWK= VS= VBUS; 6.1.4 Current consumption at VS in IS,sleep,typ sleep mode – – 10 µA Sleep mode, Tj < 85 °C VS = 13.5 V; VWK= VS= VBUS 6.1.5 Current consumption in sleep IS,lkg,SC_GND mode bus shorted to GND – 45 100 µA Sleep mode, VS = 13.5 V;VBUS=0V Receiver Output: RxD 6.1.6 HIGH level leakage current IRD,H,leak -5 – 5 µA VRxD = 5V; VBUS = VS 6.1.7 LOW level output current IRD,L 1.7 – 10 mA VRxD = 0.9V, VBUS = 0V Transmission Input: TxD 6.1.8 HIGH level input voltage range VTD,H 2 – 5.5 V Recessive state 6.1.9 Input hysteresis VTD,hys VTD,L 150 300 450 mV 1) -0.3 – 0.8 V Dominant state RTD ITD,L 100 350 800 kΩ VTxD = High 1.5 3 10 mA VTxD = 0.9 V; VWK = 0 V; VS = 13.5 V Ci – 5 – pF 1) 6.1.10 LOW level input voltage range 6.1.11 Pull-down resistance 6.1.12 Dominant current standby mode after Wake-Up 6.1.13 Input capacitance Data Sheet 19 Rev. 1.0, 2011-09-20 IFX1021SJ Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 7.0 V < VS < 27 V; RBUS = 500 Ω; -40 °C < Tj < 125 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. Enable Input: EN 6.1.14 HIGH level input voltage range VEN,ON 2 – 5.5 V Normal Operation mode 6.1.15 LOW level input voltage range VEN,OFF -0.3 – 0.8 V Sleep mode or Stand-By mode 6.1.16 Input hysteresis VEN,hys REN 150 300 450 mV 1) 15 30 60 kΩ – 6.1.17 Pull-down resistance 6.1.18 Input capacitance Ci EN – 5 – pF 1) 22 36 50 Ω IINH = -15 mA -150 -110 -40 mA VINH = 0 V -5.0 – 5.0 μA Sleep mode; VINH = 0 V Inhibit, Master Termination Output: INH RINH,on 6.1.20 Maximum INH output current IINH 6.1.21 Leakage current IINH,lk 6.1.19 Inhibit Ron resistance Wake Input: WK 6.1.22 High level input voltage VWK,H VS 1V – VS + 3V V tested VS = 13.5 V; 6.1.23 Low level input voltage VWK,L -0.3 – VS 4V V tested VS = 13.5 V; 6.1.24 Pull-up current -60 -20 -3 μA – 6.1.25 High level leakage current IWK,PU IWK,H,leak -5 – 5 μA VS = 0 V; VWK = 40 V 6.1.26 Dominant time for Wake-Up tWK 30 – 150 μs – pF 1) V – 6.1.27 Input Capacitance Ci WK – 15 6.1.28 Receiver threshold voltage, recessive to dominant edge Vth_dom 0.4 × VS 0.45 × – VS 6.1.29 Receiver dominant state VBUSdom VS 40 V – 0.4 × VS V LIN Spec 2.1 (Par. 17) 2) 6.1.30 Receiver threshold voltage, dominant to recessive edge Vth_rec – 0.55 × 0.6 × VS VS V – 6.1.31 Receiver recessive state VBUSrec 0.6 × VS – 1.15 x V Vs LIN Spec 2.1 (Par. 18) 3) 6.1.32 Receiver center voltage VBUS_CNT 0.475 × VS 0.5 × VS 0.525 V × VS LIN Spec 2.1 (Par. 19) 4) 6.1.33 Receiver hysteresis VHYS 0.07 × 0.12 × 0.175 V VS VS × VS LIN Spec 2.1 (Par. 20) 5) 6.1.34 Wake-Up threshold voltage VBUS,wk 0.40 × 0.5 × VS VS 0.6 × VS V – 30 150 μs – – Bus Receiver: BUS 6.1.35 Dominant time for bus Wake- tWK,bus Up Data Sheet – 20 Rev. 1.0, 2011-09-20 IFX1021SJ Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 7.0 V < VS < 27 V; RBUS = 500 Ω; -40 °C < Tj < 125 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. 0.8 × VS – VS – – – – – – 1.2 V 0.2 x VS V V 2.0 Bus Transmitter BUS 6.1.36 Bus recessive output voltage VBUS,ro 6.1.37 Bus dominant output voltage VBUS,do maximum load V VTxD = high Level VTxD = 0 V; RL = 500 Ω 6.0 ≤ VS ≤ 7.3 V; 7.3 < VS ≤ 10 V; 10 < VS ≤ 18 V; (see Figure 12) 6.1.38 Bus short circuit current IBUS_LIM 70 100 150 mA VBUS = 13.5 V; LIN Spec 2.1 (Par. 12); 6.1.39 Leakage current IBUS_NO_GND -1 -0.5 – mA VS = 0 V; VBUS = -12 V; LIN Spec 2.1 (Par. 15) 6.1.40 Leakage current IBUS_NO_BAT – 1 8 μA VS = 0 V; VBUS = 18 V; LIN Spec 2.1 (Par. 16) 6.1.41 Leakage current IBUS_PAS_dom -1 -0.5 – mA VS = 18 V; VBUS = 0 V; LIN Spec 2.1 (Par. 13) 6.1.42 Leakage current IBUS_PAS_rec – 1 8 μA VS = 8 V; VBUS = 18 V; LIN Spec 2.1 (Par. 14) 6.1.43 Bus pull-up resistance Rslave 20 30 47 kΩ Normal mode LIN Spec 2.1 (Par. 26) 6.1.44 LIN output current IBUS -60 -30 -5 μA 6.1.45 Input Capacitance Sleep mode VS = 13.5V VEN = 0V Ci BUS 15 – pF 1) Dynamic Transceiver Characteristics: BUS LIN Spec 2.1 (Par. 31) RRxD = 2.4 kΩ; CRxD = 20 pF 6.1.46 Propagation delay LIN bus to RxD Dominant to RxD Low Recessive to RxD High trx_pdf trx_pdr – – 1 1 6 6 μs μs 6.1.47 Receiver delay symmetry trx_sym -2 – 2 μs LIN Spec 2.1 (Par. 32) trx_sym = trx_pdf- trx_pdr; RRxD = 2.4 kΩ; CRxD = 20 pF 6.1.48 Delay time for mode change tMODE ttimeout ttorec – – 150 μs 1) 8 13 20 ms VTxD = 0 V – – 15 μs 1) 6.1.51 EN toggling to enter the flash tfl1 mode 25 35 50 μs 1) See Figure 6 tfl2 tfl3 tfl4 5 10 10 – – – – – – μs 1) See Figure 6 6.1.49 TxD dominant time out 6.1.50 TxD dominant time out recovery time 6.1.52 TxD time for flash activation Data Sheet 21 See Figure 5 Rev. 1.0, 2011-09-20 IFX1021SJ Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 7.0 V < VS < 27 V; RBUS = 500 Ω; -40 °C < Tj < 125 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. 6.1.53 Duty cycle D1 (for worst case at 20 kBit/s) D1 0.396 – – duty cycle 16) THRec(max) = 0.744 × VS; THDom(max) =0.581 × VS; VS = 7.0 … 18 V; tbit = 50 μs; D1 = tbus_rec(min)/2 tbit; LIN Spec 2.1 (Par. 27) 6.1.54 Duty cycle D2 (for worst case at 20 kBit/s) D2 – – 0.581 duty cycle 26) THRec(min)= 0.422 × VS; THDom(min)= 0.284 × VS VS = 7.6 … 18 V; tbit = 50μs; D2 = tbus_rec(max)/2 tbit; LIN Spec 2.1 (Par. 28) 1) 2) 3) 4) 5) 6) Not subject to production test, specified by design Minimum limit specified by design Maximum limit specified by design VBUS_CNT = (Vth_dom - Vth rec)/2; VHYS = VBUSrec - VBUSdom Bus load concerning LIN Spec 2.1: Load 1 = 1 nF / 1 kΩ = CBUS / RBUS Load 2 = 6.8 nF / 660 Ω = CBUS / RBUS Load 3 = 10 nF / 500 Ω = CBUS / RBUS Data Sheet 22 Rev. 1.0, 2011-09-20 IFX1021SJ Electrical Characteristics 6.2 Diagrams VS EN 100 nF INH VµC TxD RBUS RRxD RxD CRxD Bus CBus Figure 11 WK GND Simplified test circuit for dynamic characteristics VS EN 100 nF INH VµC TxD RBUS RRxD RxD CRxD Bus CBus Figure 12 Data Sheet WK GND Simplified test circuit for static characteristics 23 Rev. 1.0, 2011-09-20 IFX1021SJ Electrical Characteristics tBit TxD tBit tBit (input to transmitting node) tBus_dom(max) VSUP (Transceiver supply of transmitting node) tBus_rec(min) THRec(max) THDom(max) Thresholds of receiving node 1 THRec(min) THDom(min) Thresholds of receiving node 2 tBus_dom(min) tBus_rec(max) RxD (output of receiving node 1) trx_pdf(1) trx_pdr(1) RxD (output of receiving node 2) trx_pdr(2) trx_pdf(2) Duty Cycle 1 = tBUS_rec(min) / (2 x tBIT) Duty Cycle 2 = tBUS_rec(max) / (2 x tBIT) Figure 13 Data Sheet Timing diagram for dynamic characteristics 24 Rev. 1.0, 2011-09-20 IFX1021SJ Application Information 7 Application Information 7.1 Master Termination To achieve the required timings for the dominant to recessive transition of the bus signal an additional external termination resistor of 1 kΩ is mandatory. It is recommended to place this resistor at the master node. To avoid reverse currents from the bus line into the supply line it is recommended to place a diode in series with the external pull-up. For small systems (low bus capacitance) the EMC performance of the system is supported by an additional capacitor of at least 1 nF at the master node (see Figure 14 and Figure 15).The values for the Master Termination resistor and the bus capacitances influence the performance of the LIN network. They depend on the number of nodes inside the LIN network and on the parasitic cable capacitance of the LIN bus wiring. 7.2 External Capacitors A capacitor of 10 μF at the supply voltage input VS buffers the input voltage. In combination with the required reverse polarity diode this prevents the device from detecting a power down conditions in case of negative transients on the supply line (see Figure 14 and Figure 15). The 100 nF capacitor close to the VS pin of the IFX1021SJ is required to get the best EMC performance. Data Sheet 25 Rev. 1.0, 2011-09-20 IFX1021SJ Application Information 7.3 Application Example VSupply 22 µF 100 nF VI VQ INH 10 µF GND 100 nF LIN BUS e.g. IFX25001 Master Node VS WK INH 5 V or 3.3V IFX1021SJ 1 kΩ Pull-Up to Micro Controller Supply 100 nF RxD TxD BUS Micro Controller e.g XC22xx EN GND GND 1 nF ECU1 22 µF 100 nF VI VQ INH 10 µF GND 100 nF e.g. IFX25001 Slave Node VS WK INH 5 V or 3.3V IFX1021SJ RxD TxD BUS 220 pF Pull-Up to Micro Controller Supply 100 nF Micro Controller e.g XC22xx EN GND GND ECUX APPLICATION_IFX1021SJ_V00.VSD Figure 14 Data Sheet Simplified Application Circuit with Bus Short to GND Feature applied 26 Rev. 1.0, 2011-09-20 IFX1021SJ Application Information VSupply 22 µF 100 nF VI VQ INH 10 µF GND 100 nF LIN BUS e.g. IFX25001 Master Node VS WK INH 5 V or 3.3V IFX1021SJ 1 kΩ Pull-Up to Micro Controller Supply RxD TxD BUS 100 nF Micro Controller e.g XC22xx EN GND GND 1 nF ECU1 22 µF 100 nF VI VQ INH 10 µF GND 100 nF e.g. IFX25001 Slave Node VS WK INH 5 V or 3.3V IFX1021SJ RxD TxD BUS 220 pF Pull-Up to Micro Controller Supply 100 nF Micro Controller e.g XC22xx EN GND GND ECUX APPLICATION_IFX1021SJ_V01.VSD Figure 15 Data Sheet Simplified application Circuit without Bus Short to GND Feature 27 Rev. 1.0, 2011-09-20 IFX1021SJ Package Outlines 8 Package Outlines 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 16 PG-DSO-8 (Plastic Dual Small Outline PG-DSO-8) 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. Data Sheet 28 Dimensions in mm Rev. 1.0, 2011-09-20 IFX1021SJ Revision History 9 Revision History Revision Date Changes 1.0 2011-09-20 Data Sheet - Initial Release Data Sheet 29 Rev. 1.0, 2011-09-20 Edition 2011-09-20 Published by Infineon Technologies AG 81726 Munich, Germany © 2011 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, 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. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. The Infineon Technologies component described in this Data Sheet may be used in life-support devices or systems and/or automotive, aviation and aerospace applications or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that lifesupport automotive, aviation and aerospace device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.