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TC74A0-50VCT Datasheet(PDF) 1 Page - Microchip Technology |
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TC74A0-50VCT Datasheet(HTML) 1 Page - Microchip Technology |
1 / 16 page © 2002 Microchip Technology Inc. DS21462B-page 1 TC74 Features • Digital Temperature Sensing in SOT-23-5 Package • Outputs Temperature as an 8-Bit Digital Word • Simple Serial Port Interface • Solid-State Temperature Sensing: - ±2°C Accuracy from +25°C to +85°C - ±3°C Accuracy from 0°C to +125°C • 3.0 and 5.5V Operating Range •Low Power: - 200 µA Operating -5 µA Standby Mode Applications • Thermal Protection for Hard Disk Drives and other PC Peripherals • PC Card Devices for Notebook Computers • Low Cost Thermostat Controls • Power Supplies • Thermistor Replacement Package Type General Description The TC74 is a serially accessible digital temperature sensor particularly suited for low cost and small form- factor applications. Temperature data is converted from the onboard thermal sensing element and made available as an 8-bit digital word. Communication with the TC74 is accomplished via a 2- wire SMBus/I2C™ compatible serial port. This bus also can be used to implement multi-drop/multi-zone monitoring. The SHDN bit in the CONFIG register can be used to activate the low power Standby mode. Temperature resolution is 1°C. Conversion rate is a nominal 8 samples/sec. Power consumption is only 200 µAtyp, (5µA Standby, typ). Small size, low installed cost, and ease of use make the TC74 an ideal choice for implementing thermal management in a variety of systems. Functional Block Diagram 12 3 4 5 TC74 TO-220 SOT-23 VDD GND 1 2 NC 5 4 SDA SCLK TC74 3 Internal Sensor (Diode) ∆∑ Modulator Temperature Register Serial Port Interface Control Logic SDA SCL Tiny Serial Digital Thermal Sensor |
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