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The MIC705/MIC706/MIC707/MIC708 are inexpensive

microprocessor supervisory circuits that monitor power

supplies in microprocessor based systems. The circuit

functions include a watchdog timer, microprocessor

reset, power failure warning and a debounced manual

reset input.

The MIC705 and MIC706 offer a watchdog timer

function while the MIC707 and MIC708 have an active

high reset output in addition to the active low reset

output.

Supply voltage monitor levels of 4.65V and 4.4V are

available. The MIC705/MIC707 have a nominal reset

threshold level of 4.65V while the MIC706 and MIC708

have a 4.4V nominal reset threshold level. When the

supply voltage drops below the respective reset

threshold level, RESET is asserted.

1

2

3

4

GND

PFI

8

7

6

5

WDO

RESET

WDI

PFO

MIC705

MIC706

MR

PFO

1

2

3

4

GND

PFI

8

7

6

5

RESET

RESET

NC

PFO

MIC707

MIC708

MR

PFO

Top View

N Package - 8 Lead Plastic DIP Package

M Package - 8 Lead Plastic SOIC Package

Part

Package

Temp. Range

MIC70_N

8-Lead PDIP

-40°C to +85°C

MIC70_M

8-Lead SOIC

-40°C to +85°C

TTL/CMOS Compatible

Detect

VCC

RESET

µP

RESET

VCC

MIC705

MIC706

+5V (Regulated)

MR

WDI

I/O Line

PFO

Interrupt

PFI

DC Voltage

(Unregulated)

Manual

Reset

WDO

NMI

Typical Operating Circuit

Features

Description

Pin Configuration

Ordering Information

Typical Applications

MIC705/6/7/8 µP Supervisory Circuits

MIC705/6/7/8

µP Supervisory Circuits