SI9241AEY_01 Vishay Intertechnology, SI9241AEY_01 Datasheet - Page 4

• Manufacturer Part Number: SI9241AEY_01
• Description: Single-ended Bus Transceiver
• Manufacturer: Vishay Intertechnology

Si9241AEY
Vishay Siliconix
The Si9241AEY can be either in transmit or receive mode and
it contains over temperature, and short circuit V
detection circuits.
The voltage on K is internally compared to V
voltage on the K pin is less than V
“low.” If the voltage on the K pin is greater than V
output will be “high.”
In order to be in transmit mode, CS must be set “low.” When
CS and TX are set “low” the internal MOSFET will turn on,
causing the K pin to be “low.” In the transmit mode, the
processor monitors RX and TX. When the two mirror each
other there is no fault. In the event of over temperature, or short
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4
FAULT
V
CS
DD
TX
Narrow Body
SO Package
Top View
1
2
3
4
8
7
6
5
BAT/2
Pin Number
then RX output will be
RX
V
K
GND
BAT
1
2
3
4
5
6
7
8
BAT/2
BAT/2
BAT
. If the
then RX
Symbol
FAULT
GND
V
V
TX
CS
RX
BAT
fault
K
DD
Positive Power Supply
Transmit, Input
Chip Select, Input
Fault, Open Drain Output
Ground Connection
Transmit/Receive, Bidirectional
Battery Power Supply
Receiver, Output
circuit to V
protect the IC and the external open drain FAULT pin will be
asserted. The K pin will stay in high impedance and RX will
follow the K pin. The fault will be reset when CS is toggled high.
RX, CS and TX pins have an internal pull up resistor to V
while the K pin has internal pull down resistors. When any one
of the TX, V
When CS is set “high” the Si9241AEY is in receive mode and
the internal MOSFET for the K pin is turned off. The RX output
will follow the K pin. If CS is “low” while the IC is receiving data,
an incorrect fault signal will occur.
To inhibit the short detect, tie CS and TX together.
Description
Part Number
Si9241AEY
BAT
BAT
, the Si9241AEY will turn off the K output to
or GND pins is open the K output is off.
Temperature Range
–40 to 125_C
S-02936—Rev. D, 22-Jan-01
Document Number: 70787
DD