MC74
Serial Digital Temperature Sensor
The MC74 is a serial digital temperature sensor suited for low cost applications. Temperature data is converted from the integrated thermal sensing element and made available as an 8–bit serial digital word. Communication with the MC74 is accomplished via 2–wire SMBus/I2C–compatible serial port. Temperature resolution is 1°C. Conversion rate is a nominal 8 samples/sec. Power consumption is only 200 µA (5. 0 µA Standby).
Features
• Temperature Range: –40°C to +125°C
• 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. 3 V and 5. 5 V Operating Range
• Low Power
200 µA Operations
5. 0 µA Standby Mode
Typical Applications
• Thermal Protection for Hard Disk Drives and Other PC Peripherals • Low–Cost Thermostat Controls • Power Supplies
FUNCTIONAL BLOCK DIAGRAM
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