IMP1 832
Pin Configuration
DIP/SO/MicroSO
PBRST 1
TD 2
TOL 3
GND 4
IMP1832
8 V
CC
7 ST
6 RESET
5 RESET
1832_01.eps
Pin Descriptions
Pin Number
8-Pin Package
1
2
3
4
5
Name
PBRST
TD
TOL
GND
RESET
Function
Debounced manual pushbutton reset input
Watchdog time delay selection. (t
TD
= 150ms for TD = GND, t
TD
= 610ms for TD = Open,
and t
TD
=1200ms for TD = V
CC
)
Selects 10% (TOL connected to GND) or 20% (TOL connected to V
CC
) trip point tolerance
Ground
Active HIGH reset output. RESET is active:
1. If V
CC
falls below the reset voltage trip point.
2. If PBRST is LOW.
3. If ST is not strobed LOW before the timeout period set by TD expires.
4. During power-up.
Active LOW reset output. (See RESET)
Strobe Input
5V power
6
7
8
RESET
ST
V
CC
Ordering Information
Part Number
IMP1832
IMP1832S
IMP1832SEMA
Package
8-DIP
8-SO
8-MicroSO
Operating Temperature
Range
– 40°C to 85°C
– 40°C to 85°C
– 40°C to 85°C
Maximum Supply
Current (
µ
A)
20
20
20
Voltage Monitoring
Application
3.3V
3.3V
3.3V
1832_t01.eps
2
408-432-9100/www.impweb.com
©
1999 IMP, Inc.
A1PROS [ A1 PROS CO., LTD. ]
