ADM1232 Analog Devices, ADM1232 Datasheet - Page 5

• Manufacturer Part Number: ADM1232
• Description: Microprocessor Supervisory Circuit
• Manufacturer: Analog Devices

Specifications of ADM1232

• Batt-backup-flg: No
• Manual Reset Capability: Yes
• Package: DIP,SOIC,SOP
• Power Fail Indicator: No
• Reset Threshold Summary: 4.37V & 4.62V
• Reset Output-stage: Active-High/Push-Pull,Active-Low/Open-Drain
• Min Reset Timeout (ms): 250
• Typ Watchdog Timeout (ms): 1200,150,600
• Watchdog Timer: Yes

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
RW-16
1, 3, 5, 7,
10, 12,
14, 16
2
4
6
8
9
11
13
15
Pin No.
N-8, R-8,
RM-8
1
2
3
4
5
6
7
8
Mnemonic
NC
PB RESET
TOLERANCE
GND
RESET
RESET
STROBE
V
TD
CC
Description
No Connection.
Push-Button Reset Input. This debounced input ignores pulses of less than 1 ms and is
guaranteed to respond to pulses greater than 20 ms.
Time Delay Set. This input allows the user to select the maximum amount of time that the
ADM1232 allows the STROBE input to remain inactive—that is, STROBE is not receiving any
high-to-low transitions—without forcing the ADM1232 to generate a RESET pulse.
See the
Tolerance Input. This input determines how much the supply voltage is allowed to decrease (as a
percentage) before a RESET is asserted. Connect this pin to V
0 V Ground Reference for All Signals.
Active High Logic Output. This pin is asserted when any of the following events occurs:
V
if there are no high-to-low transitions within the limits set by TD at STROBE; and during power-up.
Inverse of RESET. This pin has an open-drain output.
The STROBE input is used to monitor the activity of a microprocessor. If there are no high-to-low
transitions within the time specified by TD, a reset is asserted.
Power Supply Input, 5 V.
CC
decreases below the amount specified by the TOLERANCE input; when PB RESET is forced low;
Specifications
TOLERANCE
TOLERANCE
TOLERANCE
PB RESET
PB RESET
PB RESET
Figure 5. N-8 and R-8 Pin Configuration
Figure 3. RW-16 Pin Configuration
Figure 4. RM-8 Pin Configuration
GND
GND
GND
TD
NC
NC
NC
NC
TD
TD
1
2
3
4
Rev. C | Page 5 of 12
1
2
3
4
1
2
3
4
5
6
7
8
NC = NO CONNECT
section,
(Not to Scale)
(Not to Scale)
(Not to Scale)
ADM1232
ADM1232
ADM1232
TOP VIEW
TOP VIEW
TOP VIEW
Figure 8
16
15
14
13
12
11
10
9
8
7
6
5
8
7
6
5
NC
V
NC
STROBE
NC
RESET
NC
RESET
V
STROBE
RESET
RESET
V
STROBE
RESET
RESET
CC
CC
CC
, and the
STROBE Timeout Selection section.
CC
for 10% and to GND for 5%.
ADM1232