Si9243A Vishay Siliconix Single-Ended Bus Transceiver DESCRIPTION FEATURES The Si9243AEY is a monolithic bus transceiver designed to provide bidirectional serial communication in automotive diagnostic applications. * Operating Power Supply Range 6 V VBAT 36 V * Reverse Battery Protection Down to VBAT - 24 V * Standby Mode With Very Low Current Consumption IBAT(SB) = 1 A at VDD = 0.5 V * Low Quiescent Current in OFF Condition IBAT = 120 A and IDD 10 A * ISO 9141 Compatible * Overtemperature Shutdown Function For K Output * Defined K Output OFF for Open GND * Defined Receive Output Status for Open K Input * Defined K Output OFF for TX Input Open * Open Drain Fault Output * 2 kV ESD * Typical Transmit Speeds of 200 kBaud 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 x 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 C to 125 C). The Si9243AEY is available in both standard and lead (Pb)-free packages. 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 S11-0975-Rev. F, 16-May-11 Logic and Fault Detect Circuitry (See State Diagram and Truth Table) www.vishay.com 1 This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Si9243A Vishay Siliconix OUTPUT TABLE AND STATE DIAGRAMS Over Temp Power On A=1 INPUTS 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. STATE VARIABLE OUTPUT TABLE RXK RXL TX L A B K 0 0 1 1 0 0 0 Comments 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 Parameter Limit Unit Voltages Referenced to Ground Voltage On VBAT Voltage K, L Voltage Difference V(VBAT, K, L) Voltage On Any Pin (Except VBAT , K, L) or Max. Current Voltage on VDD K Pin Only, Short Circuit Duration (to VBAT or GND) - 24 to 45 - 16 to (VBAT + 1) 55 - 0.3 V to (VDD + 0.3 V) or 10 mA 7 V Continuous Operating Temperature (TA) - 40 to 125 Junction and Storage Temperature - 55 to 150 Thermal Impedance (JA) V 125 C 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 Parameter Limit Unit Voltages Referenced to Ground VDD 4.5 to 5.5 VBAT 6 to 36 K, L 6 to 36 Digital Inputs www.vishay.com 2 V 0 to VDD Document Number: 70788 S11-0975-Rev. F, 16-May-11 This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Si9243A Vishay Siliconix SPECIFICATIONS Parameter Symbol Test Conditions Unless Specified VDD = 4.5 V to 5.5 V VBAT = 6 V to 36 V Limits - 40 to 125 C Temp.a Transmitter and Logic Levels TX Input Low Voltage VILT Full TX Input High Voltage VIHT Full TX Input Capacitanced TX Input Pull-up Resistance CINT RTX Min.b Typ.c 1.5 Full V 3.5 Full VDD = 5.5 V, TX = 1.5 V, 3.5 V Unit Max.b 10 20 10 pF 40 k K Transmit VOLK K Output Low Voltage VOHK K Output High Voltage K Rise, Fall Times tr, tf K Output Sink Resistance Rsi K Output Capacitanced Receiver L and K Input High Voltage CO L and K Input Hysteresisc, d L and K Input Currents RL = 510 5 %, VBAT = 6 to 18 Full 0.2 VBAT RL = 1 k 5 %, VBAT = 16 to 36 Full 0.2 VBAT RL = 510 5 %, VBAT = 4.5 Full RL = 510 5 %, VBAT = 4.5 to 18 Full 0.95 VBAT RL = 1 k 5 %, VBAT = 16 to 36 Full 0.95 VBAT See Test Circuit TX = 0 V 1.2 V Full 9.6 s Full 110 Full 20 pF VIH Full VHYS Full IIH RXL and RXK Output Low Voltage VOLR RXL and RXK Pull-up Resistance RRX TX = 4 0.65 VBAT V 0.05 VBAT VIH= VBAT Full 20 A VILK, VILL = 0.35 VBAT IOLR = 1 mA Full 0.4 V 20 k Full 5 RL = 510 5 %, VBAT = 6 V to 18 V CL = 10 nF, See Test Circuit Full 3 10 RL = 1 k 5 %, VBAT = 16 V to 36 V CL = 4.7 nF, See Test Circuit Full 3 10 RL = 510 5 %, VBAT = 6 V to 18 V CL = 10 nF, See Test Circuit Full 3 10 RL = 1 k 5 %, VBAT = 16 V to 36 V CL = 4.7 nF, See Test Circuit Full 3 10 IBAT(on) TX = 0 V, VBAT 16 V Full 1.2 3 Bat Supply Current Off IBAT(off) VIHT VTX, VIHK VK, VIHL VL VBAT 12 V Full 120 220 Bat Supply Current Standby IBAT(SB) VDD 0.5 V, VBAT 12 V Full <1 10 Logic Supply Current On IDD(on) VDD 5.5 V, TX = 0 V Full 1.4 2.3 mA IDD(off) VIHT VTX, VIHK VK, VIHL VL VBAT 12 V Full 10 A RXK Turn On Delay td(on) RXK Turn Off Delay td(off) Supplies Bat Supply Current On Logic Supply Current Off Miscellaneous TX Transmit Baud Rate c RXL and RXK Receive Baud Rate Transmission Frequency TX Minimum Pulse Widthd, e Over Temperature Shutdownd s BRT RL = 510 , CL = 10 nF Full BRR 6 V < VBAT < 16 V, CRX = 20 pF Full fK-RXK 6 V < VBAT < 16 V, RK = 510 , CK 1.3 nF tTX TSHUT Temperature Rising 10.4 200 Full 50 Full 1 160 mA A kBaud 200 kHz s 180 30 Temperature Shutdown Hysteresisc THYST 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 S11-0975-Rev. F, 16-May-11 C www.vishay.com 3 This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Si9243A Vishay Siliconix PIN CONFIGURATION Narrow Body SO Package RXK 1 8 ORDERING INFORMATION L Part Number RXL 2 7 VBAT Si9243AEY-T1 VDD 3 6 K Si9243AEY-T1-E3 (Lead (Pb)-free) TX 4 5 GND Temperature Range - 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 Si9243AEY can be either in transmit or receive mode and it contains over temperature, and short circuit VBAT fault detection circuits. 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". 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. 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. 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 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 www.vishay.com 4 Document Number: 70788 S11-0975-Rev. F, 16-May-11 This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Si9243A 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 tf tr GND RL = 510 , CL = 10 nF, VBAT = 6 V to 18 V RL = 1 k, CL = 4.7 nF, VBAT = 16 V to 36 V APPLICATIONS CIRCUIT Diagnostic Tester ECU VDD Si9243AEY VB L-Line + 510 VDD Microcontroller I/Os 0.4 + VDD V + - K-Line VBAT VDD C1 0.1 F 50 V C1 0.1 F Bus ECU = Electronic Control Unit Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see www.vishay.com/ppg?70788. Document Number: 70788 S11-0975-Rev. F, 16-May-11 www.vishay.com 5 This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Package Information Vishay Siliconix SOIC (NARROW): 8-LEAD JEDEC Part Number: MS-012 8 6 7 5 E 1 3 2 H 4 S h x 45 D C 0.25 mm (Gage Plane) A e B All Leads q A1 L 0.004" MILLIMETERS INCHES DIM Min Max Min Max A 1.35 1.75 0.053 0.069 A1 0.10 0.20 0.004 0.008 B 0.35 0.51 0.014 0.020 C 0.19 0.25 0.0075 0.010 D 4.80 5.00 0.189 0.196 E 3.80 4.00 0.150 e 0.101 mm 1.27 BSC 0.157 0.050 BSC H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.50 0.93 0.020 0.037 q 0 8 0 8 S 0.44 0.64 0.018 0.026 ECN: C-06527-Rev. 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