 2002 Microchip Technology Inc.

DS21434C-page 1

M

TC54

Features

• Precise Detection Thresholds: Standard ±2.0%,

Custom ±1.0%

• Small Packages: 3-Pin SOT-23A, 3-Pin SOT-89,

5-Pin SOT-23A (7.7V only)

• Low Current Drain: Typ. 1

µA

• Wide Detection Range: 1.1V to 6.0V and 7.7V

• Wide Operating Voltage Range: 0.7V to 10V

Applications

• Battery Voltage Monitoring

• Microprocessor Reset

• System Brown-out Protection

• Switching Circuit in Battery Backup

• Level Discriminator

Device Selection Table

Other output voltages are available. Please contact Microchip

Technology Inc. for details.

Package Type

General Description

The TC54 Series are CMOS voltage detectors, suited

especially for battery-powered applications because of

their 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 1.1V to 6.0V and 7.7V, for a 2% and 1.5V to 6.0V

for a 1% tolerance.

The device includes a comparator, low-current high-

precision reference, laser-trimmed divider, hysteresis

circuit and output driver. The TC54 is available with

either an open-drain or complementary output stage.

Functional Block Diagram

Part Number

Package

Temp. Range

TC54-xxxxxxxxxxx 3-Pin SOT-23A -40°C to +85°C

TC54-xxxxxxxxxxx

3-Pin SOT-89

-40°C to +85°C

TC54-xxxxxxxxxxx 5-Pin SOT-23A -40°C to +85°C

13

2

TC54

TC54

1

3

2

3-Pin SOT-23A

3-Pin SOT-89

5

5-Pin SOT-23A

TC54

1

3

4

2

NC

NC

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

5-Pin SOT-23A is equivalent to the EIAJ SC-74A.

TC54VC only

1

3

+

–

2

TC54VN has open-drain output.

TC54VC has complementary output.

Voltage Detector