TC12 Datasheet, PDF (1/1 Pages) TelCom Semiconductor, Inc – LOW COST, ONE WIRE DIGITAL THERMOMETER WITH SHUTDOWN

EVALUATION
KIT
AVAILABLE
1 ^{PRELIMINARY INFORMATION}
TC12
LOW COST, ONE WIRE DIGITAL THERMOMETER WITH SHUTDOWN
2
FEATURES
GENERAL DESCRIPTION
s Single Wire Interface to Host Microcontroller
s High Precision ................. ±1°C Accuracy (Typical)
s Wide Measurement Range .......... – 40°C to +125°C
s No External Components Required
s Complimentary (TC12C) or Open Drain Outputs
(TC12N)
s Low Voltage Operation ........................ 2.7V to 5.5V
s Small Package ........................................ SOT-23A-5
s Low Cost
s Shutdown Input
APPLICATIONS
s Notebook Computers
s File Servers
s Desktop Computers
The TC12 is a monolithic temperature sensor that
outputs a pulse waveform whose duty cycle varies in direct
proportion to measured temperature. This output format is
easily converted to binary data using logic or the counter/
3 ^{timer circuit on-board the system microcontroller. Typical}
accuracy is ±1°C over the rated measurement range of
– 40°C to +125°C. It operates from supply voltages as low
as 2.7V.
Unlike voltage output temperature sensors, the digital
output of the TC12 offers superior immunity to system noise
and does not require an A/D converter. Unlike two wire serial
temperature sensors, the TC12 communicates over a single
wire, and without complex serial protocol overhead.
4
ORDERING INFORMATION
FUNCTIONAL BLOCK DIAGRAM
TEMPERATURE
V_DD
TO VOLTAGE
CONVERTER
Part No. Package Temp. Range Output Config.
TC12CVCT SOT-23A-5* – 40°C to +125°C Complimentary
TC12NVCT SOT-23A-5* – 40°C to +125°C
Open Drain
TC625EV Evaluation Kit for the TC12 and TC625
NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74).
5
TC12
SHDN
PIN CONFIGURATION
SOT-23A-5*
DELTA SIGMA
MODULATOR
D_OUT
(Top View)
VDD
NC
6
5
4
TYPICAL APPLICATION
2.7V to 5.5V
TC12
MICRO
CONTROLLER
I/O
TC12CVCT
TC12NVCT
1
2
3
DOUT SHDN GND
7
NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74)
MEASUREMENT
ZONE
TELCOM SEMICONDUCTOR, INC.
8
TC12-01 11/13/96
2-31