TelCom Semiconductor Inc TC625NVZB, TC625CVZB, TC625NVNT, TC625CVNT Datasheet

1- WIRE DIGIT AL THERMOMETER

V

DD

V

DD

D

OUT

D

OUT

GND

GND

NOTE: *SOT-23A-3 is equivalent

to EIAJ (SC-74A)

TC625CVNT
TC625NVNT

TC625CVZB
TC625NVZB

TO-92-3SOT-23A-5*

(Top View)

112323

4

5

1-WIRE DIGIT AL THERMOMETER

EVALUATION

KIT

AVAILABLE

PRELIMINARY INFORMATION

TC625

TC625

FEATURES

■ Single Wire Interface to Host Microcontroller

■ High Precision ................. ±1°C Accuracy (Typical)

■ Wide Measurement Range .......... – 25°C to +100°C

■ No External Components Required

■ Complimentary (TC625C) or Open Drain Outputs

(TC625N)

■ Low Voltage Operation ........................2.7V to 5.5V

■ Small Packages ......................... TO-92, SOT-23A-5

APPLICATIONS

■ Isolated Temperature Sensing

■ Environmental Control Systems

■ Process / Industrial Control Systems

■ Power System Temperature Monitoring

■ Process Control Systems

FUNCTIONAL BLOCK DIAGRAM

V

TEMPERATURE

TO VOLTAGE

CONVERTER

TC625

DELTA SIGMA

MODULATOR

DD

D

OUT

GENERAL DESCRIPTION

The TC625 is a monolithic temperature sensor that
generates a pulse train, the high and low times of which vary
in direct proportion to the temperature of the device. This
technique allows temperature to be accurately measured by
the host microcontroller without an A/D converter, and with
only a single I/O port pin. The overall accuracy is ±1.5°C
typical over the rated measurement range of – 25°C to
+100°C.

Unlike voltage output temperature sensors, the digital
output of the TC625 offers superior immunity to system
noise and does not require an A/D converter. Unlike two wire
serial temperature sensors, the TC625 communicates over
a single wire, and without serial protocol overhead.

The TC625 operates from supply voltages as low as

2.7V. Open drain (TC625N) and complimentary (TC625C)
output configurations are available. The TC625 is available
in TO-92 and SOT-23A-5 packages.

ORDERING INFORMATION

Part No. Package Output Config.

TC625CVNT SOT-23A-5* Complimentary
TC625CVZB TO-92-3 Complimentary
TC625NVNT SOT-23A-5* Open Drain
TC625NVZB TO-92-3 Open Drain

TC625EV Evaluation Kit for the TC625 and TC12

NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74A).

PIN CONFIGURATIONS

TYPICAL APPLICATION

2.7V to 5.5V

TC625

MEASUREMENT

ZONE

TC625- 01 5/13/97 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.

TC625-01 5/13/97

MICRO

CONTROLLER

I/O

1

PRELIMINARY INFORMATION

TC625

PACKAGE DIMENSIONS

1- WIRE DIGIT AL THERMOMETER

SOT-23A-5*

0.75 (1.90)

REFERENCE

.122 (3.10)
.098 (2.50)

.020 (0.50)
.012 (0.30)

.122 (3.10)
.106 (2.70)

.057 (1.45)
.035 (0.90)

.006 (0.15)
.000 (0.00)

NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74A).

.210 (5.33)
.170 (4.32)

.500

(12.70)

MIN.

.071 (1.80)
.059 (1.50)

.037 (0.95)

REFERENCE

10° MAX.

TO-92-3

.010 (0.25)
.004 (0.09)

.022 (0.55)
.008 (0.20)

.165 (4.19)
.125 (3.18)

.105 (2.67)
.080 (2.03)

.205 (5.21)
.175 (4.45)

Sales Offices

TelCom Semiconductor

1300 Terra Bella Avenue
P.O. Box 7267
Mountain View, CA 94039-7267
TEL: [phone]
FAX: [phone]
E-Mail: [e-mail]

TC625-01 5/12/97

.018 (0.46)
.015 (0.38)

TelCom Semiconductor

Austin Product Center
9101 Burnet Rd. Suite 214
Austin, TX 78758
TEL: [phone]
FAX: [phone]

.055 (1.40)
.045 (1.14)

.105 (2.67)
.095 (2.41)

2

.135

(3.43)

MIN.

.018 (0.46)
.015 (0.38)

Dimensions: inches (mm)

TelCom Semiconductor H.K. Ltd.

10 Sam Chuk Street, Ground Floor
San Po Kong, Kowloon
Hong Kong
TEL: [phone]
FAX: [phone]

Printed in the U.S.A.