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| SI9243AEY Vishay Siliconix Single-Ended Bus Transceiver FEATURES 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 mA @ VDD = 0.5 V D Low Quiescent Current in OFF Condition IBAT = 120 mA and IDD v 10 mA D ISO 9141 Compatible D D D D D D 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 + L - L RXK + K - + VBAT/2 - VDD K Logic and Fault Detect Circuitry (See State Diagram and Truth Table) K TX Document Number: 70788 S-02936--Rev. D, 22-Jan-01 www.vishay.com 1 SI9243AEY Vishay Siliconix OUTPUT TABLE AND STATE DIAGRAMS Over Temp STATE INPUTS VARIABLE TX L 0 1 1 0 L L 1 0 OUTPUT TABLE K 0 1 0 1 HiZ HiZ 1 0 A 1 1 1 1 0 1 1 1 B 1 1 1 1 1 0 1 1 RXK 0 1 0 1 K K 1 0 RXL 0 1 1 0 L L 1 0 Comments Power On A=1 Over Temp @TX Short Circuit A=0 0 1 0 1 X 0 1 Over Temp Short Circuit Receive Mode Power On B=1 B=0 TX Note: Over Temp is an internal condition, not meant to be a logic signal. 1 X = "1" or "0" HiZ = High Impedance State ABSOLUTE MAXIMUM RATINGS Voltage Referenced to Ground Voltage On VBAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -24 V to 45 V Voltage K , L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -16 V to (VBAT + 1 V) 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 Voltage on VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V K Pin Only, Short Circuit Duration (to VBAT or GND) . . . . . . . . . . Continuous Operating Temperature (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 125_C Junction and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . -55 to 150_C Thermal Resistance QJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 K, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V to 36 V Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to VDD www.vishay.com 2 Document Number: 70788 S-02936--Rev. D, 22-Jan-01 SI9243AEY Vishay Siliconix SPECIFICATIONS Test Conditions Unless Specified Parameter Transmitter and Logic Levels TX Input Low Voltage TX Input High Voltage TX Input Capacitanced TX Input Pull-up Resistance VILT VIHT CINT RTX VDD = 5.5 V, TX = 1.5 V, 3.5 V Full Full Full Full 10 20 3.5 10 40 1.5 V pF kW Limits -40 to 125_C Symbol VDD = 4.5 to 5.5 V VBAT = 6 to 36 V Tempa Minb Typc Maxb Unit K Transmit RL = 510 W "5% , VBAT = 6 to 18 V K Output Low Voltage VOLK RL = 1 kW "5% , VBAT = 16 to 36 V RL = 510 W "5% , VBAT = 4.5 V RL = 510 W "5% , VBAT = 4.5 to 18 V K Output High Voltage VOHK tr, tf Rsi CO TX = 0 V RL = 1 kW "5% , VBAT = 16 to 36 V See Test Circuit Full Full Full Full Full Full Full Full 0.95 VBAT 0.95 VBAT 9.6 110 20 ms W pF 0.2 VBAT 0.2 VBAT 1.2 V K Rise, Fall Times K Output Sink Resistance K Output Capacitanced Receiver L and K Input High Voltage L and K Input Hysteresisc, d L and K Input Currents RXL and RXK Output Low Voltage RXL and RXK Pull-up Resistance VIH VHYS IIH VOLR RRX RL = 510 W "5% , VBAT = 6 to 18 V CL = 10 nF, See Test Circuit RL = 1 kW "5% , VBAT = 16 to 36 V CL = 4.7 nF, See Test Circuit RL = 510 W "5% , VBAT = 6 to 18 V CL = 10 nF, See Test Circuit RL = 1 kW "5% , VBAT = 16 to 36 V CL = 4.7 nF, See Test Circuit TX = 4 V VIH = VBAT VILK, VILL = 0.35 VBAT IOLR = 1 mA Full Full Full Full Full Full Full Full Full 5 3 3 3 3 0.65 VBAT 0.05 VBAT 20 0.4 20 10 10 ms m 10 10 V mA V kW RXK Turn On Delay td(on) RXK Turn Off Delay td(off) Supplies Bat Supply Current On Bat Supply Current Off Bat Supply Current Standby Logic Supply Current On Logic Supply Current Off IBAT(on) IBAT(off) IBAT(SB) IDD(on) IDD(off) TX = 0 V, VBAT v 16 V VIHT v VTX, VIHK v VK, VIHL v VL VBAT v 12 V VDD v 0.5 V, VBAT v 12 V VDD v 5.5 V, TX = 0 V VIHT v VTX, VIHK v VK, VIHL v VL VBAT v 12 V Full Full Full Full Full 1.2 120 t1 1.4 3 220 10 2.3 10 mA mA mA mA Miscellaneous TX Transmit Baud Rate RXL and RXK Receive Baud Ratec Transmission Frequency TX Minimum Pulse Widthd, e Over Temperature Shutdownd Temperature Shutdown Hysteresisc BRT BRR fK-RXK tTX TSHUT THYST Temperature Rising RL = 510 W , CL = 10 nF 6 V t VBAT < 16 V, CRX = 20 pF 6 V t VBAT < 16 V, RK = 510 W, CK v 1.3 nF Full Full Full Full 50 1 160 180 30 10.4 200 200 kBaud kHz ms _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 RXL VDD TX 1 2 3 4 8 7 6 5 L VBAT K GND ORDERING INFORMATION Part Number SI9243AEY Temperature Range -40 to 125_C Top View PIN DESCRIPTION Pin Number 1 2 3 4 5 6 7 8 Symbol RXK RXL VDD TX GND K VBAT L Description K Receiver, Output L Receiver, Output Positive Power Supply Transmit, Input 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. 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 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. 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 td(off) td(on) L RXL VDD VBAT + - TX TXmin VBAT RXK VDD + - V + - RL K 80% 80% CL TX VK, VL tr tf 20% 20% GND RL = 510 W, CL = 10 nF, VBAT = 6 V to 18 V RL = 1 kW, CL = 4.7 nF, VBAT = 16 V to 36 V APPLICATION CIRCUIT ECU VDD Diagnostic Tester SI9243AEY VB L-Line + - 510 W VDD I/Os Microcontroller + - 0.4 W V VDD + - K-Line VBAT VDD C1 0.1 mF 50 V C1 0.1 mF Bus ECU = Electronic Control Unit Document Number: 70788 S-02936--Rev. D, 22-Jan-01 www.vishay.com 5 |
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