ADM1232

–4–

REV. B

PIN FUNCTION DESCRIPTIONS

Mnemonic

Function

PB RESET

Push Button Reset Input. This debounced input will ignore pulses of less than 1 ms and is guaranteed to re-

spond to pulses greater than 20 ms.

TD

Time Delay Set allows the user to select the maximum amount of time the ADM1232 will allow the

STROBE

input to remain inactive (i.e.,

STROBE is not receiving any high-to-low transitions), without forcing the

ADM1232 to generate a RESET pulse. (See

STROBE specifications, Figure 4 and the note on STROBE

timeout selection.)

TOLERANCE

Tolerance Input. This input will determine how much the supply voltage will be allowed to decrease (as a per-

GND

0 V ground reference for all signals.

RESET

Active high logic output. Will be asserted when:

2.

PB RESET is forced low or,

3. If there are no high-to-low transitions within the limits set by TD at

STROBE or,

4. During power-up.

RESET

Inverse of RESET, with an open drain output.

STROBE

The

STROBE input is used to monitor the activity of a microprocessor. If there are no high-to-low transi-

tions within the time specified by TD, a reset will be asserted.

Power supply input +5 V.

PIN CONFIGURATIONS

R-16

N-8 and R-8

RM-8

14

13

12

11

16

15

10

9

8

1

2

3

4

7

6

5

TOP VIEW

(Not to Scale)

ADM1232

NC = NO CONNECT

NC

STROBE

NC

NC

NC

TD

NC

NC

NC

TOLERANCE

GND

PB RESET

RESET

RESET

NC

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

ADM1232

PB RESET

RESET

STROBE

TD

TOLERANCE

GND

RESET

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

ADM1232

PB RESET

RESET

STROBE

TD

TOLERANCE

GND

RESET