TCM811 datasheet(1/16 Pages) MICROCHIP

Part #	TCM811

Description	4-Pin Reset Monitors

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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DS21615C-page 1

TCM811/TCM812

Features

• Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V,

5.0V Nominal Supplies

• Manual Reset Input

• 140 ms Minimum RESET Output Duration

• RESET Output Valid to VDD = 1.0V (TCM811)

• Low 6 µA (typ.) Supply Current

•VDD Transient Immunity

• Small 4-Pin SOT-143 Package

• No External Components

• Replacement for MAX811/812 and Offers a Lower

Threshold Voltage Option

• Push-Pull RESET Output

• Temperature Range:

- Commercial (C) -40°C to +85°C

Applications

• Computers

• Embedded Systems

• Battery Powered Equipment

• Critical Microcontroller Power Supply Monitoring

Typical Application Circuit

General Description

The TCM811 and TCM812 are cost effective system

supervisory circuits designed to monitor V DD in digital

systems and provide a reset signal to the host

controller 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 (5 µs for

F version) of VDD falling through the reset voltage

threshold. RESET is maintained active for a minimum

of 140 ms after VDD rises above the reset threshold.

The TCM812 has an active high RESET output while

the TCM811 has an active low RESET output. The

output of the TCM811 is valid down to VDD =1V. Both

devices are available in a 4-Pin SOT-143 package,

specified with a temperature range of -40°C to +85°C.

The TCM811/TCM812 are optimized to reject fast

transient glitches on the VDD line. A low supply current

of 6 µA (VDD = 3.3V) makes these devices ideal for

battery powered applications.

Package Types:

TCM811

V

DD

V

DD

V

DD

RESET

INPUT

(Active Low)

GND

MR

PUSH

BUTTON

PIC

Microcontroller

4

3

2

0.1µF

V

DD

TCM811 RESET

GND 1

2

TCM812 (RESET)

3

4

MR

SOT-143

4-Pin Reset Monitors

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