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參數資料
| 型號： | TC74A7-5.0VCTTRG |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO5 |
| 封裝： | SOT-23A, 5 PIN |
| 文件頁數： | 1/16頁 |
| 文件大小： | 338K |
| 代理商： | TC74A7-5.0VCTTRG |
2002 Microchip Technology Inc.
DS21462C-page 1
M
TC74
Features
Digital Temperature Sensing in SOT-23-5 or
TO-220 Packages
Outputs Temperature as an 8-Bit Digital Word
Simple SMBus/I2C Serial Port Interface
Solid-State Temperature Sensing:
- ±2°C (max.) Accuracy from +25°C to +85°C
- ±3°C (max.) Accuracy from 0°C to +125°C
Supply Voltage of 2.7V to 5.5V
Low Power:
- 200 A (typ.) Operating Current
- 5 A (typ.) Standby Mode Current
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 Types
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. During normal operation, the
quiescent current is 200 A (typ). During standby
operation, the quiescent current is 5 A (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
VD
D
NC
SD
A
SC
L
K
TO-220
SOT-23
VDD
GND
12
NC
5
4
SDA
SCLK
TC74
3
12 3 4 5
TC74
Note: The TO-220 tab is connected
to pin 3 (GND)
Internal Sensor
(Diode)
Σ Modulator
Temperature
Register
Serial Port
Interface
Control
Logic
SDA
SCLK
Tiny Serial Digital Thermal Sensor
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