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MIC706P/R/S/T, MIC708R/S/T 碌P Supervisory Circuits

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

碌P Supervisory Circuits

Description

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.

Pin Configuration

Top View

MR

V

CC

GND

PFI

1

2

8

7

WDO

RESET

(RESET for MIC706P)

WDI

PFO

MIC706

3

4

6

5

N Package - 8 Lead Plastic DIP Package

M Package - 8 Lead Plastic SOIC Package

MR

V

CC

GND

PFI

1

2

8

7

RESET

RESET

NC

PFO

MIC708

3

4

6

5

Features

Typical Applications

路

30碌A(chǔ) Maximum Supply Current

路

Debounced Manual Reset Input is

路

Reset Pulse Width, 200ms

路

Watchdog Timer, 1.6s (MIC706)

路

Precision Supply Voltage Monitor

路

Early Power Fail Warning

or Low Battery

Detect

TTL/CMOS Compatible

路

Laptop Computers

路

Intelligent Instruments

路

Critical Microprocessor Power Monitoring

路

Printers

路

Computers

路

Controllers

Ordering Information

Part

MIC70_ _N

MIC70_ _M

Package

8-Lead PDIP

8-Lead SOIC

Temp. Range

-40擄C to +85擄C

-40擄C to +85擄C

Typical Operating Circuit

+3.0 or +3.3V (Regulated)

Manual

Reset

MR

VCC

RESET

VCC

RESET

MIC706

DC Voltage

(Unregulated)

PFI

WDI

WDO

PFO

NMI

碌P

I/O Line

Interrupt

1

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