 2002 Microchip Technology Inc.

DS21429B-page 1

M

TC51

Features

• Precise Detection Thresholds: ±2.0%

• Small Package: 3-Pin SOT-23A

• Low Supply Current: Typ. 1

µA

• Wide Detection Range: 1.6V to 6.0V

• Wide Operating Voltage Range: 0.7V to 10V

• Built-in Delay Circuit: 50msec to 200 msec

• Open-Drain Output

Applications

• Battery Voltage Monitoring

• Microprocessor Reset

• System Brown-out Protection

Device Selection Table

Other output voltages are available. Please contact Microchip

Technology Inc. for details.

Package Type

General Description

The TC51 is a very low power, open drain output,

CMOS voltage detector with built-in delay. It is

particularly well-suited for battery powered applications

because of its extremely low 1

µA operating current and

small surface-mount packaging. Each part is laser-

trimmed to the desired threshold voltage, which can be

specified from 1.6V to 6.0V. The standard built-in

output delay is 50msec-200msec.

The device includes a comparator, low-current high-

precision reference, laser-programmed voltage divider,

hysteresis circuit and output driver with digital delay

timer.

HIGH after expiration of the built-in delay time.

Functional Block Diagram

Part Number

Package

Temp. Range

TC51-xxxxxxxxxx

3-Pin SOT-23A -40°C to +85°C

TC51

1

2

3

3-Pin SOT-23A

NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59.

Delay

Circuit

1

µA Voltage Detector with Output Delay