Product is End of Life 12/2014
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 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
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 (ΘJA)
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
kΩ
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 Ω ± 5 %, VBAT = 6 to 18
Full
0.2 VBAT
RL = 1 kΩ ± 5 %, VBAT = 16 to 36
Full
0.2 VBAT
RL = 510 Ω ± 5 %, VBAT = 4.5
Full
RL = 510 Ω ± 5 %, VBAT = 4.5 to 18
Full
0.95 VBAT
RL = 1 kΩ ± 5 %, VBAT = 16 to 36
Full
0.95 VBAT
See Test Circuit
TX = 0 V
1.2
V
Full
9.6
µs
Full
110
Ω
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
µA
VILK, VILL = 0.35 VBAT
IOLR = 1 mA
Full
0.4
V
20
kΩ
Full
5
RL = 510 Ω ± 5 %, VBAT = 6 V to 18 V
CL = 10 nF, See Test Circuit
Full
3
10
RL = 1 kΩ ± 5 %, VBAT = 16 V to 36 V
CL = 4.7 nF, See Test Circuit
Full
3
10
RL = 510 Ω ± 5 %, VBAT = 6 V to 18 V
CL = 10 nF, See Test Circuit
Full
3
10
RL = 1 kΩ ± 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
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