Si9243AEY Vishay Siliconix Single-Ended Bus Transceiver FEATURES D D D D D D D Operating Power Supply Range 6 V v VBAT v 36 V D Reverse Battery Protection Down to VBAT w –24 V D Standby Mode With Very Low Current Consumption IBAT(SB) = 1 A @ VDD = 0.5 V D Low Quiescent Current in OFF Condition IBAT = 120 A and IDD v 10 A D ISO 9141 Compatible Overtemperature Shutdown Function For K Output Defined K Output OFF for Open GND Defined Receive Output Status for Open L or K Inputs Defined K Output OFF for TX Input Open 2-kV ESD Typical Transmit Speeds of 200 kBaud DESCRIPTION The Si9243AEY is a monolithic bus transceiver designed to provide bidirectional serial communication in automotive diagnostic applications. The device incorporates protection against overvoltages and short circuits to VBAT. The transceiver pin is protected and can be driven beyond the VBAT voltage. The RX output is capable of driving CMOS or 1 LSTTL load. The Si9243AEY is built on the Vishay Siliconix BiC/DMOS process. This process supports bipolar transistors, CMOS, and DMOS. An epitaxial layer prevents latchup. The Si9243AEY is available in a 8-pin SO package and operates over the automotive temperature range (–40 to 125_C). PIN CONFIGURATION AND FUNCTIONAL BLOCK DIAGRAM GND VDD VBAT VDD RXL VDD RXK + L – L + K – K + VBAT/2 – VDD K TX Document Number: 70788 S-02936—Rev. D, 22-Jan-01 Logic and Fault Detect Circuitry (See State Diagram and Truth Table) www.vishay.com 1 Si9243AEY Vishay Siliconix OUTPUT TABLE AND STATE DIAGRAMS STATE INPUTS VARIABLE Over Temp Power On A=1 A=0 Over Temp @TX Short Circuit Power On B=1 B=0 TX Note: Over Temp is an internal condition, not meant to be a logic signal. OUTPUT TABLE TX L A B K RXK RXL Comments 0 0 1 1 0 0 0 1 1 1 1 1 1 1 0 1 1 1 0 0 1 1 0 1 1 1 1 0 X L 0 1 HiZ K L Over Temp 0 L 1 0 HiZ K L Short Circuit 1 1 1 1 1 1 1 Receive Mode 1 0 1 1 0 0 0 X = “1” or “0” HiZ = High Impedance State ABSOLUTE MAXIMUM RATINGS Voltage Referenced to Ground Voltage on VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage On VBAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –24 V to 45 V K Pin Only, Short Circuit Duration (to VBAT or GND) . . . . . . . . . . Continuous Voltage K , L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –16 V to (VBAT + 1 V) Operating Temperature (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 to 125_C Voltage Difference V(VBAT, K, L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 V Voltage On Any Pin (Except VBAT , K, L) or Max. Current . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (VDD + 0.3 V) or 10 mA Junction and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . -55 to 150_C Thermal Resistance JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125_C/W Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING RANGE Voltage Referenced to Ground VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 V to 5.5 V VBAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V to 36 V www.vishay.com 2 K, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V to 36 V Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to VDD Document Number: 70788 S-02936—Rev. D, 22-Jan-01 Si9243AEY Vishay Siliconix SPECIFICATIONS Limits Test Conditions Unless Specified Parameter VDD = 4.5 to 5.5 V VBAT = 6 to 36 V Symbol –40 to 125_C Tempa Minb Typc Maxb Unit Transmitter and Logic Levels TX Input Low Voltage VILT Full TX Input High Voltage VIHT Full TX Input Capacitanced CINT TX Input Pull-up Resistance RTX 1.5 3.5 Full 10 20 V 10 pF 40 k VDD = 5.5 V, TX = 1.5 V, 3.5 V Full RL = 510 "5% , VBAT = 6 to 18 V Full 0.2 VBAT RL = 1 k "5% , VBAT = 16 to 36 V Full 0.2 VBAT RL = 510 "5% , VBAT = 4.5 V Full K Transmit K Output Low Voltage K Output High Voltage VOLK VOHK K Rise, Fall Times tr, tf K Output Sink Resistance Rsi K Output Capacitanced CO 1.2 V RL = 510 "5% , VBAT = 4.5 to 18 V Full 0.95 VBAT RL = 1 k "5% , VBAT = 16 to 36 V Full 0.95 VBAT See Test Circuit Full 9.6 Full 110 Full 20 pF TX = 0 V s Receiver L and K Input High Voltage VIH Full L and K Input Hysteresisc, d VHYS Full L and K Input Currents IIH RXL and RXK Output Low Voltage VOLR RXL and RXK Pull-up Resistance RRX TX = 4 V VIH = VBAT Full VILK, VILL = 0.35 VBAT IOLR = 1 mA Full Full 0.65 VBAT V 0.05 VBAT 20 5 A 0.4 V 20 k RL = 510 "5% , VBAT = 6 to 18 V CL = 10 nF, See Test Circuit Full 3 10 RL = 1 k "5% , VBAT = 16 to 36 V CL = 4.7 nF, See Test Circuit Full 3 10 RL = 510 "5% , VBAT = 6 to 18 V CL = 10 nF, See Test Circuit Full 3 10 RL = 1 k "5% , VBAT = 16 to 36 V CL = 4.7 nF, See Test Circuit Full 3 10 IBAT(on) TX = 0 V, VBAT v 16 V Full 1.2 3 Bat Supply Current Off IBAT(off) VIHT v VTX, VIHK v VK, VIHL v VL VBAT v 12 V Full 120 220 Bat Supply Current Standby IBAT(SB) VDD v 0.5 V, VBAT v 12 V Full t1 10 Logic Supply Current On IDD(on) VDD v 5.5 V, TX = 0 V Full 1.4 2.3 mA IDD(off) VIHT v VTX, VIHK v VK, VIHL v VL VBAT v 12 V Full 10 RXK Turn On Delay RXK Turn Off Delay td(on) td(off) s Supplies Bat Supply Current On Logic Supply Current Off mA A Miscellaneous TX Transmit Baud Rate BRT RL = 510 , CL = 10 nF Full RXL and RXK Receive Baud Ratec BRR 6 V t VBAT < 16 V, CRX = 20 pF Full fK-RXK 6 V t VBAT < 16 V, RK = 510 CK v 1.3 nF Full 50 Full 1 Transmission Frequency TX Minimum Pulse Widthd, e tTX Over Temperature Shutdownd TSHUT Temperature Shutdown Hysteresisc THYST Temperature Rising 10.4 200 160 200 kBaud kHz s 180 30 _ _C Notes a. Room = 25_C, Cold and Hot = as determined by the operating temperature suffix. b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. d. Guaranteed by design, not subject to production test. e. Minimum pulse width to reset a fault condition. Document Number: 70788 S-02936—Rev. D, 22-Jan-01 www.vishay.com 3 Si9243AEY Vishay Siliconix PIN CONFIGURATION Narrow Body SO Package RXK 1 8 L RXL 2 7 VBAT VDD 3 6 K TX 4 5 GND ORDERING INFORMATION Part Number Temperature Range Si9243AEY –40 to 125_C Top View PIN DESCRIPTION Pin Number Symbol Description 1 RXK K Receiver, Output 2 RXL L Receiver, Output 3 VDD Positive Power Supply 4 TX Transmit, Input 5 GND 6 K 7 VBAT 8 L Ground Connection K Transmit/Receive, Bidirectional Battery Power Supply L Transmit, Input FUNCTIONAL DESCRIPTION The voltage on the K and L pins are internally compared to VBAT/2. If the voltage on the K or L pin is less than VBAT/2 then RXK or RXL output will be “low.” If the voltage on the K or L pin is greater than VBAT/2 then RXK or RXL output will be “high. monitors the RXK and TX. When the two mirror each other there is no fault. In the event of over temperature, or short circuit to VBAT, the Si9243AEY will turn off the K output to protect the IC. The K pin will stay in high impedance and RXK will follow the K pin. The fault will be reset when TX is toggled high. RXK, RXL and TX pins have internal pull up resistor to VDD while K and L pins have internal pull down resistors. When any one of the TX, VBAT or GND pins is open the K output is off. In order to be in transmit mode, TX must be set “low.” The TX signal is then internally inverted and turns the MOSFET on, causing the K pin to be “low.” In transmit mode, the processor When the TX pin is set “high” the Si9243AEY is in receive mode and the internal MOSFET is turned off. RXL and RXK outputs will follow L and K inputs respectively. The Si9243AEY can be either in transmit or receive mode and it contains over temperature, and short circuit VBAT fault detection circuits. www.vishay.com 4 Document Number: 70788 S-02936—Rev. D, 22-Jan-01 Si9243AEY Vishay Siliconix TEST CIRCUIT AND TIMING DIAGRAMS (TRANSMIT ONLY) VDD VBAT VDD Si9243AEY RXK L td(off) td(on) + – RXL TX VDD TXmin VBAT + – RXK VDD VBAT RL V 80% 80% K + – CL 20% TX 20% VK, VL tr GND tf RL = 510 , CL = 10 nF, VBAT = 6 V to 18 V RL = 1 k, CL = 4.7 nF, VBAT = 16 V to 36 V APPLICATION CIRCUIT Diagnostic Tester ECU VDD Si9243AEY VB L-Line + – 510 VDD I/Os Microcontroller 0.4 + – VDD V + – K-Line VBAT VDD C1 0.1 F 50 V C1 0.1 F Bus ECU = Electronic Control Unit Document Number: 70788 S-02936—Rev. D, 22-Jan-01 www.vishay.com 5