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IMP705/6/7/8, 8 13L

P

OWER

M

ANAGEMENT

Low-Power 碌P Supervisor Circuits

鈥?/div>

Watc hdog timer

Br o wnout det ection

Po w er suppl y monit or

Key Features

N

Improved replacements for the Maxim

MAX705/6/7/8, MAX813L

鈥?140碌A(chǔ) maximum supply current

鈥?60% improvement

N

Precision power supply monitor

鈥?4.65V threshold (IMP705/707/813L)

鈥?4.40V threshold (IMP706/8)

N

Debounced manual reset input

N

Voltage monitor

鈥?1.25V threshold

鈥?Battery monitor/Auxiliary supply monitor

N

Watchdog timer (IMP705/706/813L)

N

200ms reset pulse width

N

Active HIGH reset output (IMP707/708/813L)

N

MicroSO package

The IMP705/706/707/708 and IMP813L CMOS supervisor circuits

monitor power-supply and battery voltage level, and

碌P/碌C

operation.

Compared to pin-compatible devices offered by Maxim Integrated

Products, IMP devices feature 60 percent lower maximum supply current.

The family offers several functional options. Each device generates a

reset signal during power-up, power-down and during brownout

conditions. A reset is generated when the supply drops below

4.65V (IMP705/707/813L) or 4.40V (IMP706/708). For 3V power supply

applications, refer to the IMP705P/R/S/T data sheet. In addition, the

IMP705/706/813L feature a 1.6 second watchdog timer. The IMP707/708

have both active-HIGH and active-LOW reset outputs but no watchdog

function. The IMP813L has the same pin-out and functions as the IMP705

but has an active-HIGH reset output. A versatile power-fail circuit has a

1.25V threshold, useful in checking battery levels and non-5V supplies. All

devices have a manual reset (MR) input. The watchdog timer output will

trigger a reset if connected to MR.

All devices are available in 8-pin DIP, SO and MicroSO packages.

Applications

N

Computers and embedded controllers

Battery-operated systems

Intelligent instruments

Wireless communication systems

PDAs and handheld equipment

Block Diagrams

WDI

V

CC

Transition

Detector

Watchdog

Timer

WDO

RESET

V

CC

0.25mA

Timebase

0.25mA

MR

V

CC

+

鈥?/div>

RESET

Generator

RESET

(RESET)

(IMP813L)

MR

V

CC

+

鈥?/div>

4.65V (IMP707)

4.40V (IMP708)

RESET

Generator

RESET

4.65V (IMP705/813L)

4.40V (IMP706)

PFI

+

IMP705

IMP706

IMP813L

1.25V

鈥?/div>

PFO

PFI

1.25V

+

PFO

鈥?/div>

IMP707

IMP708

GND

705_01.eps

705_02.eps

GND

漏

1999 IMP, Inc.

408-432-9100/www.impweb.com

1

型號(hào)

版本

描述

廠商

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