4-279

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC54

FEATURES

s

Precise Detection Thresholds .... Standard

Custom

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Small Packages ........... SOT-23A-3, SOT-89, TO-92

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Low Current Drain ..................................... Typ. 1

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Wide Detection Range .......................... 2.1V to 6.0V

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Wide Operating Voltage Range ............ 1.5V to 10V

APPLICATIONS

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Battery Voltage Monitoring

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Microprocessor Reset

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System Brownout Protection

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Switching Circuit in Battery Backup

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Level Discriminator

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 2.1V to 6.0V,

in 0.1V steps.

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.

specified threshold voltage (V

–

V

–

–

whereupon it resets to a logic HIGH.

FUNCTIONAL BLOCK DIAGRAM

VOLTAGE DETECTOR

Output form:

N = Nch Open Drain

C = CMOS Output

Detected Voltage:

Ex: 21 = 2.1V; 60 = 6.0V

Extra Feature Code: Fixed: 0

Tolerance:

1 =

± 1.0% (custom)

2 =

± 2.0% (standard)

Temperature: E: – 40

°C to + 85°C

Package Type and Pin Count:

CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3

Taping Direction:

Standard Taping

Reverse Taping

No suffix: TO-92 Bulk

*SOT-23A-3 is equivalent to EIAJ (SC-59).

ORDERING INFORMATION

PART CODE TC54 V X XX X X X XX XXX

TC54-10 11/8/96

VOUT

TC54VC only

VSS

1

3

+

–

VIN

2

VREF

TC54VN has open-drain output.

TC54VC has complementary output.

PIN CONFIGURATIONS

13

2

VIN

VIN

VSS

VOUT

VSS

VOUT

TC54

TC54

TC54

1

1

2

3

3

2

*SOT-23A-3

SOT-89-3

TO-92

*SOT-23A-3 is equivalent to EIAJ (SC-59)