参数资料
型号: TC74A7-5.0VCT
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO5
封装: SOT-23A, 5 PIN
文件页数: 1/16页
文件大小: 430K
代理商: TC74A7-5.0VCT
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
A Operating
-5
A 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
Atyp, (5A 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
GND
V
DD
NC
SDA
SCLK
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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