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The MIC706P/R/S/T and MIC708R/S/T are inexpensive

microprocessor supervisory circuits that monitor power

supplies in 3.0 and 3.3 Volt microprocessor based

systems. The circuit functions include a watchdog timer,

microprocessor reset, power failure warning and a

debounced manual reset input.

The MIC706 offers a watchdog timer function, while the

MIC708 has no watchdog timer but has an active high

reset output in addition to the active low reset output.

The R, S, and T versions are similar in all respects

except for supply voltage reset threshold levels. The

threshold levels are 2.63, 2.93, and 3.08V respectively.

When the supply voltage drops below the reset

threshold level, RESET (and RESET for the MIC708) is

asserted.

The MIC706P is identical to the MIC706R, except that

the Reset output is asserted high.

1

2

3

4

GND

PFI

8

7

6

5

WDO

RESET

WDI

PFO

MIC706

MR

PFO

1

2

3

4

GND

PFI

8

7

6

5

RESET

RESET

NC

PFO

MIC708

MR

PFO

(RESET for MIC706P)

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

MIC706

+3.0 or +3.3V (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

MIC706P/R/S/T, MIC708R/S/T µP Supervisory Circuits

MIC706P/R/S/T, MIC708R/S/T

µP Supervisory Circuits