1

DA9171A.000

July 31, 1997

MAS9171A

OCTAL PORT PROTECTON

• Parallel In, Parallel Out

• High Voltage Inputs

• Automotive

DESCRIPTION

The MAS9171A is an eight channel protection

circuit for microprocessors in automotive

applications. All inputs are protected against energy

rich pulses according to DIN40839/ISO7637.

Internal analog filters and suitable input threshold

voltages provide the functionality within a noise

spectrum of 150 kHz up to 1 GHz without need of

external filter components. The MAS9171A is

optimized for low current consumption.

FEATURES

APPLICATION

•

8 digital channels

•

Supply voltage 3.3 V/5 V

•

Low supply current

•

High voltage inputs

•

Internal analog filter

•

-40

°C to +125°C

•

SO-18 package

• Replacement of protection circuitry in car

electronics and industrial bus systems

BLOCK DIAGRAM

IN1

IN2

IN3

IN4

IN5

IN6

IN7

IN8

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

VDD

GND

PROTECT

FILTER

COMP