MAS9171AS MAS [Micro Analog systems], MAS9171AS Datasheet - Page 6

• Manufacturer Part Number: MAS9171AS
• Description: OCTAL PORT PROTECTON
• Manufacturer: MAS [Micro Analog systems]

APPLICATION INFORMATION
The MAS9171A is a eight channel protection circuit for microprocessors in automotive applications that may
be used in industrial applications as well. 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 150KHz up to 1GHz without need of external filter components. The MAS9171A
is optimized for low current consumption.
Fig. 3: Block diagram of MAS9171A
INPUT PROTECTION USING MAS9171A
APPLICATION EXAMPLES
VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7
VIN8
Fig.4: Electronic Dashboard for Cars
Sensors
Switch
Tacho
Gen-
erator
Batt.
ABS
Oil
Protect
1
Filter
VDD
GND
0-12V
COMP
VBAT
PGND
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
VOUT8
Vdd
Vdd
Vdd
MAS9171
MAS9171
MAS9171
Filter+
Protection
Advantages of MAS9171A
- lower price when comparing Part+Board costs
- easy layout
- better reliability
- less test time
- universal to use, less development time
Voltage-
Regulator
+ Reset
Port1
Port2
Port3
uC
Res
Vdd
Instrument
Driver
EEPROM
Lamp
Driver
DA9171A.000
July 31, 1997
Vbat
Vbat
6