TC74A0-5.0VCT データシートの表示（PDF） - Microchip Technology
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TC74A0-5.0VCT Datasheet PDF : 16 Pages
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TC74
Tiny Serial Digital Thermal Sensor
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:
- 200µA Operating
- 5µA 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
TO-220
TC74
12 345
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
200µA typ, (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
Internal Sensor
(Diode)
∆∑ Modulator
Serial Port
Interface
Control
Logic
SDA
SCL
Temperature
Register
SOT-23
SDA
SCLK
5
4
TC74
1
2
3
NC
GND VDD
© 2002 Microchip Technology Inc.
DS21462B-page 1
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