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SI9243AEY

更新时间：2025-07-13 02:10:29
品牌：VISHAY
描述：Single-Ended Bus Transceiver

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中文翻译

免费 PCB/SMT

SI9243AEY 概述

Single-Ended Bus Transceiver 单端总线收发器

SI9243AEY 数据手册

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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  
D Overtemperature Shutdown Function For K Output  
D Defined K Output OFF for Open GND  
D Defined Receive Output Status for Open L or K Inputs  
D Defined K Output OFF for TX Input Open  
D 2-kV ESD  
I
BAT(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  
D 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 Si9243AEY is built on the Vishay Siliconix BiC/DMOS  
process. This process supports bipolar transistors, CMOS, and  
DMOS. An epitaxial layer prevents latchup.  
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 Si9243AEY is available in a 8-pin SO package and  
operates over the automotive temperature range (–40 to  
125_C).  
The RX output is capable of driving CMOS or 1   LSTTL load.  
PIN CONFIGURATION AND FUNCTIONAL BLOCK DIAGRAM  
GND  
V
V
DD BAT  
V
V
DD  
+
L
RX  
RX  
L
L
–
DD  
+
K
K
K
–
+
–
V
BAT  
/2  
V
DD  
K
Logic and Fault Detect Circuitry  
(See State Diagram and Truth Table)  
TX  
Document Number: 70788  
S-02936—Rev. D, 22-Jan-01  
www.vishay.com  
1
Si9243AEY  
Vishay Siliconix  
OUTPUT TABLE AND STATE DIAGRAMS  
STATE  
INPUTS  
VARIABLE  
OUTPUT  
TABLE  
Over Temp  
TX  
L
A
B
K
RXK RXL Comments  
Power On  
A = 1  
A = 0  
0
1
0
1
X
0
0
1
1
0
L
L
1
1
1
1
0
1
1
1
1
1
1
0
0
1
0
1
0
1
K
K
0
1
1
0
L
L
0
Over Temp @TX  
1
Short Circuit  
HiZ  
HiZ  
Over Temp  
Short Circuit  
B = 1  
B = 0  
Power On  
1
1
1
0
1
1
1
1
1
0
1
0
1
0
Receive Mode  
TX  
X = “1” or “0”  
HiZ = High Impedance State  
Note: Over Temp is an internal condition, not meant  
to be a logic signal.  
ABSOLUTE MAXIMUM RATINGS  
Voltage Referenced to Ground  
Voltage on V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V  
DD  
Voltage On V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –24 V to 45 V  
BAT  
K Pin Only, Short Circuit Duration (to V  
or GND) . . . . . . . . . . Continuous  
BAT  
Voltage K , L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –16 V to (V  
+ 1 V)  
BAT  
Operating Temperature (T ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 to 125_C  
A
Voltage Difference V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 V  
(VBAT, K, L)  
Junction and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . -55 to 150_C  
Thermal Resistance ꢁ JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125_C/W  
Voltage On Any Pin (Except V  
, K, L)  
BAT  
or Max. Current . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (V + 0.3 V) or 10 mA  
DD  
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  
K, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V to 36 V  
V
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 V to 5.5 V  
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V  
DD  
DD  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V to 36 V  
BAT  
Document Number: 70788  
www.vishay.com  
S-02936—Rev. D, 22-Jan-01  
2
Si9243AEY  
Vishay Siliconix  
SPECIFICATIONS  
Limits  
Test Conditions Unless Specified  
–40 to 125_C  
V
DD  
= 4.5 to 5.5 V  
= 6 to 36 V  
Parameter  
Symbol  
Tempa  
Minb  
Typc  
Maxb  
Unit  
V
BAT  
Transmitter and Logic Levels  
TX Input Low Voltage  
TX Input High Voltage  
V
Full  
Full  
Full  
Full  
1.5  
ILT  
V
V
IHT  
3.5  
10  
d
TX Input Capacitance  
C
INT  
10  
40  
pF  
TX Input Pull-up Resistance  
R
V
DD  
= 5.5 V, TX = 1.5 V, 3.5 V  
20  
kꢂ  
TX  
K Transmit  
R
R
= 510 ꢂ "5%, V  
= 6 to 18 V  
Full  
Full  
Full  
0.2 V  
0.2 V  
L
BAT  
BAT  
K Output Low Voltage  
V
= 1 kꢂ "5%, V  
= 16 to 36 V  
OLK  
OHK  
L
BAT  
BAT  
R
L
= 510 ꢂ "5%, V  
= 4.5 V  
1.2  
BAT  
V
0.95  
R
L
= 510 ꢂ "5%, V  
= 4.5 to 18 V  
= 16 to 36 V  
Full  
Full  
BAT  
V
BAT  
K Output High Voltage  
V
0.95  
R
L
= 1 kꢂ "5%, V  
BAT  
V
BAT  
K Rise, Fall Times  
t , t  
See Test Circuit  
TX = 0 V  
Full  
Full  
Full  
9.6  
110  
20  
ꢀ s  
ꢂ
r
f
K Output Sink Resistance  
Rsi  
d
K Output Capacitance  
C
O
pF  
Receiver  
0.65  
L and K Input High Voltage  
V
IH  
Full  
V
BAT  
V
0.05  
c, d  
L and K Input Hysteresis  
V
Full  
Full  
Full  
Full  
Full  
HYS  
V
BAT  
L and K Input Currents  
I
V
= V  
BAT  
20  
0.4  
20  
10  
ꢀ A  
V
IH  
IH  
TX = 4 V  
RX and RX Output  
V
, V = 0.35 V  
L
K
ILK ILL BAT  
V
OLR  
Low Voltage  
I
= 1 mA  
OLR  
RX and RX Pull-up Resistance  
R
5
kꢂ  
L
K
RX  
R
L
R
L
R
L
R
L
= 510 ꢂ "5%, V  
= 6 to 18 V  
BAT  
3
3
3
3
C
L
= 10 nF, See Test Circuit  
RX Turn On Delay  
K
t
d(on)  
= 1 kꢂ "5%, V  
= 16 to 36 V  
BAT  
Full  
Full  
Full  
10  
10  
10  
C
L
= 4.7 nF, See Test Circuit  
ꢀ
s
= 510 ꢂ "5%, V  
= 6 to 18 V  
BAT  
C
L
= 10 nF, See Test Circuit  
RX Turn Off Delay  
K
t
d(off)  
= 1 kꢂ "5%, V  
C
= 16 to 36 V  
BAT  
= 4.7 nF, See Test Circuit  
L
Supplies  
Bat Supply Current On  
I
TX = 0 V, V  
v 16 V  
Full  
Full  
1.2  
3
mA  
BAT(on)  
BAT(off)  
BAT(SB)  
BAT  
V
V
v V , V  
v V , V  
v 12 V  
v V  
V
V
IHT  
TX IHK  
K
IHL  
L
BAT  
Bat Supply Current Off  
I
120  
220  
ꢀ
A
Bat Supply Current Standby  
Logic Supply Current On  
I
V
v 0.5 V, V  
v 12 V  
BAT  
Full  
Full  
t1  
10  
DD  
I
V
DD  
v 5.5 V, TX = 0 V  
1.4  
2.3  
mA  
DD(on)  
DD(off)  
v V , V  
v V , V  
v 12 V  
v V  
IHT  
TX IHK  
K
IHL  
L
BAT  
Logic Supply Current Off  
I
Full  
10  
ꢀ
ꢃ
Miscellaneous  
TX Transmit Baud Rate  
BR  
R
= 510 ꢂ , C = 10 nF  
Full  
Full  
Full  
Full  
10.4  
T
L
L
kBaud  
c
RX and RX Receive Baud Rate  
BR  
R
6 V t V  
< 16 V, C = 20 pF  
200  
200  
L
K
BAT  
RX  
Transmission Frequency  
TX Minimum Pulse Width  
f
6 V t V  
< 16 V, R = 510 ꢂꢄ C v 1.3 nF  
50  
1
kHz  
K-RXK  
BAT  
K
K
d, e  
t
TX  
ꢀ s  
d
Over Temperature Shutdown  
T
T
Temperature Rising  
160  
180  
30  
SHUT  
HYST  
_C  
c
Temperature Shutdown Hysteresis  
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  
www.vishay.com  
S-02936—Rev. D, 22-Jan-01  
3
Si9243AEY  
Vishay Siliconix  
PIN CONFIGURATION  
Narrow Body  
SO Package  
RX  
L
8
1
K
ORDERING INFORMATION  
RX  
V
V
K
7
6
5
2
3
4
L
BAT  
Part Number  
Temperature Range  
DD  
TX  
GND  
Si9243AEY  
–40 to 125_C  
Top View  
PIN DESCRIPTION  
Pin Number  
Symbol  
Description  
1
2
3
4
5
6
7
8
RX  
K Receiver, Output  
K
RX  
L Receiver, Output  
L
V
DD  
Positive Power Supply  
Transmit, Input  
TX  
GND  
K
Ground Connection  
K Transmit/Receive, Bidirectional  
Battery Power Supply  
L Transmit, Input  
V
BAT  
L
FUNCTIONAL DESCRIPTION  
The Si9243AEY can be either in transmit or receive mode and  
it contains over temperature, and short circuit VBAT fault  
detection circuits.  
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.  
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  
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.  
Document Number: 70788  
www.vishay.com  
S-02936—Rev. D, 22-Jan-01  
4
Si9243AEY  
Vishay Siliconix  
TEST CIRCUIT AND TIMING DIAGRAMS (TRANSMIT ONLY)  
V
DD  
V
BAT  
V
DD  
Si9243AEY  
RX  
K
t
t
d(on)  
L
d(off)  
+
–
RX  
L
TX  
V
DD  
TX  
min  
V
BAT  
V
BAT  
+
–
RX  
K
R
L
80%  
80%  
K
+
–
V
DD  
V
C
L
20%  
20%  
TX  
V , V  
K
L
t
r
t
f
GND  
R
L
R
L
= 510 ꢂ, C = 10 nF, V  
= 6 V to 18 V  
BAT  
= 16 V to 36 V  
BAT  
L
= 1 kꢂ, C = 4.7 nF, V  
L
APPLICATION CIRCUIT  
Diagnostic Tester  
ECU  
V
V
Si9243AEY  
DD  
V
B
L-Line  
K-Line  
+
–
510 ꢂ  
DD  
Microcontroller  
I/Os  
0.4 ꢂ  
+
–
+
V
V
DD  
–
V
BAT  
V
DD  
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

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