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111899

FEATURES

Super-low power version of DS1232

50

µA quiescent current

Halts and restarts an out-of-control

microprocessor

Automatically restarts microprocessor after

power failure

Monitors pushbutton for external override

Accurate 5% or 10% microprocessor power

supply monitoring

8-pin DIP, 8-pin SOIC or space saving

µ-SOP

package available

Optional 16-pin SOIC package available

Industrial temperature -40°C to +85°C

available, designated N

PIN ASSIGNMENT

PIN DESCRIPTION

PBRST

- Pushbutton Reset Input

TD

- Time Delay Set

TOL

GND

- Ground

RST

- Reset Output (Active High)

RST

- Reset Output (Active Low, open

drain)

ST

- Strobe Input

- +5 Volt Power

DESCRIPTION

The DS1232LP/LPS Low Power MicroMonitor Chip monitors three vital conditions for a

microprocessor: power supply, software execution, and external over-ride. First, a precision temperature-

condition occurs, an internal power-fail signal is generated which forces reset to the active state. When

250 ms to allow the power supply and processor to stabilize.

DS1232LP/LPS

Low Power MicroMonitor Chip

www.dalsemi.com

DS1232LP 8-Pin DIP (300-mil)

See Mech. Drawings Section

PBRST

TD

TOL

GND

ST

RST

1

2

3

4

8

7

6

5

RST

DS1232LPS 16-Pin SOIC (300-mil)

See Mech. Drawings Section

NC

PBRST

NC

TD

NC

TOL

NC

GND

NC

VCC

NC

ST

NC

RST

NC

RST

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

DS1232LP

µ (118-mil µ-SOP)

See Mech. Drawings Section

PBRST

TD

TOL

GND

ST

RST

RST

DS1232LPS-2 8-Pin SOIC (150-mil)

See Mech. Drawings Section

PBRST

TD

TOL

GND

VCC

ST

RST

1

2

3

4

8

7

6

5

RST

8

7

6

5

1

2

3

4