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| 1- WIRE DIGITAL THERMOMETER EVALUATION KIT AVAILABLE PRELIMINARY INFORMATION TC625 TC625 1-WIRE DIGITAL THERMOMETER FEATURES s s s s s s s Single Wire Interface to Host Microcontroller High Precision ................. 1C Accuracy (Typical) Wide Measurement Range .......... - 25C to +100C 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 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 1.5C typical over the rated measurement range of - 25C to +100C. 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. APPLICATIONS s s s s s Isolated Temperature Sensing Environmental Control Systems Process / Industrial Control Systems Power System Temperature Monitoring Process Control Systems FUNCTIONAL BLOCK DIAGRAM ORDERING INFORMATION TEMPERATURE TO VOLTAGE CONVERTER VDD Part No. TC625CVNT TC625CVZB TC625NVNT TC625NVZB Package SOT-23A-5* TO-92-3 SOT-23A-5* TO-92-3 Output Config. Complimentary Complimentary Open Drain Open Drain TC625 DELTA SIGMA MODULATOR TC625EV DOUT Evaluation Kit for the TC625 and TC12 NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74A). PIN CONFIGURATIONS SOT-23A-5* (Top View) TO-92-3 123 TYPICAL APPLICATION 2.7V to 5.5V MICRO CONTROLLER 4 5 TC625CVZB TC625NVZB I/O TC625 1 TC625CVNT TC625NVNT 2 VDD 3 DOUT DOUT MEASUREMENT ZONE GND NOTE: *SOT-23A-3 is equivalent to EIAJ (SC-74A) 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 1 VDD GND PRELIMINARY INFORMATION 1- WIRE DIGITAL THERMOMETER TC625 PACKAGE DIMENSIONS SOT-23A-5* 0.75 (1.90) REFERENCE .122 (3.10) .098 (2.50) .020 (0.50) .012 (0.30) .071 (1.80) .059 (1.50) .037 (0.95) REFERENCE .122 (3.10) .106 (2.70) .057 (1.45) .035 (0.90) .006 (0.15) .000 (0.00) 10 MAX. .022 (0.55) .008 (0.20) .010 (0.25) .004 (0.09) NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74A). TO-92-3 .165 (4.19) .125 (3.18) .210 (5.33) .170 (4.32) .500 (12.70) MIN. .105 (2.67) .080 (2.03) .135 (3.43) MIN. .205 (5.21) .175 (4.45) .018 (0.46) .015 (0.38) .105 (2.67) .095 (2.41) .055 (1.40) .045 (1.14) .018 (0.46) .015 (0.38) Dimensions: inches (mm) Sales Offices TelCom Semiconductor 1300 Terra Bella Avenue P.O. Box 7267 Mountain View, CA 94039-7267 TEL: 415-968-9241 FAX: 415-967-1590 E-Mail: liter@c2smtp.telcom-semi.com TC625-01 5/12/97 TelCom Semiconductor Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236 2 TelCom Semiconductor H.K. Ltd. 10 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: 852-2324-0122 FAX: 852-2354-9957 Printed in the U.S.A. |
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