Key Features

Applications

3-Pin Microcontroller

Power Supply Supervisor

x

Embedded controllers

x

Battery operated systems

x

Intelligent instruments

x

Wireless communication systems

x

PDAs and handheld equipment

x

Improved Maxim MAX809/MAX810 replacement

— Lower supply current…6µA

— 80% lower maximum supply current

x

Monitor 5V, 3.3V and 3V supplies

x

140ms min. reset pulse width

x

Active-low reset valid with 1.1V supply

(IMP809)

x

Small 3-pin SOT-23 package

x

No external components

x

Specified over full temperature range

— –40°C to 105°C

Block Diagrams

IMP809

(IMP810)

VCC

VCC

VCC

GND

GND

RESET

(RESET)

809/10_01.eps

µP

RESET

Input

The IMP809/IMP810 are 3.0V, 3.3V and 5.0V power supply supervisor cir-

cuits optimized for low-power microprocessor (µP), microcontroller (µC)

and digital systems. The IMP809/810 are improved drop-in replacements

for the Maxim MAX809/810 and feature 60% lower supply current.

A reset signal is issued if the power supply voltage drops below a preset

reset threshold and is asserted for at least 140ms after the supply has

risen above the reset threshold. The IMP809 has an active-low RESET

The IMP810 has an active-high RESET output. The reset comparator is

Low supply current makes the IMP809/IMP810 ideal for use in portable

and battery operated equipment. The IMP809/IMP810 are available in a

compact 3-pin SOT23 package.

Six voltage thresholds are available to support 3V to 5V systems:

IMP809, IMP8

Reset Threshold

Suffix

Voltage (V)

L

4.63

M

4.38

J

4.00

T

3.08

S

2.93

R

2.63

IMP, Inc.

San Jose, CA

408-432-9100/www.impweb.com