© 2007 Microchip Technology Inc.

DS21381D-page 1

TC1270/TC1271

Features:

and 5.0V Nominal Supplies

• Manual Reset Input

• 140 ms Minimum RESET, Reset Output Duration

• Low 7 µA Supply Current

• Small 4-Pin SOT-143 Package

• No External Components

• Replacement for MAX811/812 and Offers a Lower

Threshold Voltage Option

Applications:

• Computers

• Embedded Systems

• Battery Powered Equipment

• Critical µP Power Supply Monitoring

Typical Operating Circuit

General Description

The TC1270 and TC1271 are cost-effective system

systems and provide a reset signal to the host

processor when necessary. A manual reset input is

provided to override the reset monitor, and is suitable

for use as a push button reset. No external components

are required.

The reset output is driven active within 20 µs (4 µs for

threshold. Reset is maintained active for a minimum of

TC1271 has an active-high RESET output while the

TC1270 has an active-low RESET output. The output

are available in a 4-Pin SOT-143 package.

The TC1270/TC1271 devices are optimized to reject

suitable for battery powered applications.

Package Type

TC1270

RESET

Reset

Input

(Active Low)

GND

GND

Processor

MR

Push

Button

TC1270 RESET

GND

TC1270

TC1271

1

2

TC1271 (RESET)

3

4

MR

4-Pin Reset Monitors