Si9243A
Vishay Siliconix
Single-Ended Bus Transceiver
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 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.
FEATURES
• 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 µA at VDD = 0.5 V • Low Quiescent Current in OFF Condition IBAT = 120 µA 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
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 S11-0975-Rev. F, 16-May-11
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
INPUTS
A=0
STATE VARIABLE
A 1 1 1 1 0 1 1 1 B 1 1 1 1 1 0 1 1
OUTPUT TABLE
K 0 1 0 1 HiZ HiZ 1 0 RXK RXL 0 1 0 1 K K 1 0 0 1 1 0 L L 1 0 Over Temp Short Circuit Receive Mode Comments
Power On
A=1 Over Temp . TX Short Circuit
TX 0 1 0 1 X 0
L 0 1 1 0 L L 1 0
Power On
B=1
B=0
TX Note: Over Temp is an internal condition, not meant to be a logic signal.
1 1
X = "1" or "0" HiZ = High Impedance State
ABSOLUTE MAXIMUM RATINGS
Parameter 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) Operating Temperature (TA) Junction and Storage Temperature Thermal Impedance (JA) - 24 to 45 - 16 to (VBAT + 1) 55 - 0.3 V to (VDD + 0.3 V) or 10 7 Continuous - 40 to 125 - 55 to 150 125 °C °C/W mA V V Limit Unit
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 Voltages Referenced to Ground VDD VBAT K, L Digital Inputs 4.5 to 5.5 6 to 36 6 to 36 0 to VDD V Limit Unit
www.vishay.com 2
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 Transmitter and Logic Levels TX Input Low Voltage TX Input High Voltage TX Input Capacitanced TX Input Pull-up Resistance K Transmit RL = 510 ± 5 %, VBAT = 6 to 18 K Output Low Voltage VOLK RL = 1 k ± 5 %, VBAT = 16 to 36 RL = 510 ± 5 %, VBAT = 4.5 K Output High Voltage 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 RXK Turn On Delay VOHK tr, tf Rsi CO VIH VHYS IIH VOLR RRX td(on) RL = 510 ± 5 %, VBAT = 6 V to 18 V CL = 10 nF, See Test Circuit RL = 1 k ± 5 %, VBAT = 16 V to 36 V CL = 4.7 nF, See Test Circuit RL = 510 ± 5 %, VBAT = 6 V to 18 V CL = 10 nF, See Test Circuit RL = 1 k ± 5 %, VBAT = 16 V to 36 V CL = 4.7 nF, See Test Circuit TX = 0 V, VBAT 16 V VIHT VTX, VIHK VK, VIHL VL VBAT 12 V VDD 0.5 V, VBAT 12 V VDD 5.5 V, TX = 0 V VIHT VTX, VIHK VK, VIHL VL VBAT 12 V RL = 510 , CL = 10 nF 6 V < VBAT < 16 V, CRX = 20 pF 6 V < VBAT < 16 V, RK = 510 , CK 1.3 nF Temperature Rising TX = 4 VIH= VBAT VILK, VILL = 0.35 VBAT IOLR = 1 mA RL = 510 ± 5 %, VBAT = 4.5 to 18 RL = 1 k ± 5 %, VBAT = 16 to 36 See Test Circuit TX = 0 V Full Full Full Full Full Full Full Full 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 µs 10 10 0.95 VBAT 0.95 VBAT 9.6 110 20 µs pF 0.2 VBAT 0.2 VBAT 1.2 V 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 Full Full Full VDD = 5.5 V, TX = 1.5 V, 3.5 V Full 10 20 3.5 10 40 Min.b Typ.c Max.b 1.5 Unit
VILT VIHT CINT RTX
V pF k
V µA V k
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 Miscellaneous TX Transmit Baud Rate RXL and RXK Receive Baud Rate Transmission Frequency TX Minimum Pulse Widthd, e Over Temperature Shutdownd
c
IBAT(on) IBAT(off) IBAT(SB) IDD(on) IDD(off)
Full Full Full Full Full
1.2 120
