Si9243EY

Siliconix

S-49720—Rev. E, 27-Sep-96

4-1

Single-Ended Bus Transceiver

Features

D Single-Ended Transceiver

D Survives Shorts and Transients on Automotive Bus

D Wide Power Supply Voltage Range

D Fault Detection

D ISO 9141 Compatible

Description

The Si9243EY is a monolithic bus transceiver designed to

provide bidirectional serial communication in automotive

diagnostic applications.

The device incorporates protection against overvoltages

The Si9243EY contains temperature and short circuit

fault detection circuits. In the transmit mode, load shorts

and opens are generally detected by the processor

monitoring RXK and TX. When the two mirror each other

there is no fault, but the Si9243EY will turn off the K

output in the event of over temperature or short circuit to

toggles “high.”

TX is set “high” for receive only.

The RX output is capable of driving CMOS or

1

LSTTL load.

The Si9243EY is built on the Siliconix BiC/DMOS

process.

This process supports bipolar transistors,

CMOS, and DMOS. An epitaxial layer prevents latchup.

The Si9243EY 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

TX

RXL

K

L

+

-

L

+

-

K

+

-

K

Logic Circuitry

(See State Diagram and Truth Table)

GND

RXK

1

2

3

4

5

6

7

8

Order Number:

Si9243EY

Top View

Narrow Body

RXL

RXK

TX

K

GND

SO Package

L

Updates to this data sheet may be obtained via facsimile by calling Siliconix FaxBack, 1-408-970-5600. Please request FaxBack document #70017.

Application Note AN602 may also be obtained via FaxBack, request document #70573.