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DS1707/DS1708

3.3 and 5.0 Volt MicroMonitor

DS1707/DS1708

010996 1/9

FEATURES

sients

failure

5% or 10% resets for 5.0 volt systems

8–pin DIP and 8–pin SOIC packages

available

PIN ASSIGNMENT

RST

RST

NC

NMI

1

2

3

4

PBRST

GND

IN

8

7

6

5

8

7

6

5

1

2

3

4

PBRST

GND

IN

RST

RST

NC

NMI

8–PIN DIP

(300 MIL)

8–PIN SOIC

(150 MIL)

1

2

3

4

8

7

6

5

PBRST

GND

IN

RST

RST

NC

NMI

8–PIN

µ–SOP

(118 MIL)

See Mech. Drawings

Section

DS1707 and DS1708_/R/S/T

PIN DESCRIPTION

PBRST

– Pushbutton Reset Input

– Power Supply

GND

– Ground

IN

– Input

NMI

– Non–maskable Interrupt

NC

– No Connect

RST

– Active Low Reset Output

RST

– Active High Reset Output

DESCRIPTION

The DS1707/DS1708 3.3 or 5.0 Volt MicroMonitor moni-

tors three vital conditions for a microprocessor: power

supply, voltage sense, and external override. A preci-

sion

temperature–compensated

reference

and

device and at an upstream point for maximum protec-

tion. When the sense input detects an out–of–tolerance

condition a non–maskable interrupt is generated. As

the voltage at the device degrades an internal power fail

signal is generated which forces the reset to an active

the reset signal is kept in the active state for a minimum

of 130 ms to allow the power supply and processor to

stabilize.