MIC281
MIC281 is Low-Cost Thermal Sensor manufactured by Microchip Technology.
Features
- Remote Temperature Measurement Using Embedded Thermal Diodes or modity Transistors
- Accurate Remote Sensing: ±3°C max., 0°C to 100°C
- Excellent Noise Rejection
- I2C and SMBus 2.0-patible Serial Interface
- SMBus Timeout to Prevent Bus Lockup
- Voltage Tolerant I/Os
- Low Power Shutdown Mode
- Failsafe Response to Diode Faults
- 3.0V to 3.6V Power Supply Range
- Available in SOT23-6 Package
Applications
- Desktop, Server, and Notebook puters
- Set-Top Boxes
- Game Consoles
- Appliances
General Description
The MIC281 is a digital thermal sensor capable of measuring the temperature of a remote PN junction. It is optimized for applications favoring low cost and small size. The remote junction may be an inexpensive modity transistor, e.g., 2N3906, or an embedded thermal diode such as found in Intel Pentium® II/III/IV CPUs, AMD Athlon® CPUs, and Xilinx Virtex® FPGAs.
The MIC281 is 100% software and hardware backward patible with the MIC280 and features the same industry-leading noise performance and small size. The advanced integrating A/D converter and analog front-end reduce errors due to noise for maximum accuracy and minimum guardbanding.
A 2-wire SMBus 2.0-patible serial interface is provided for host munication. The clock and data pins are 5V-tolerant regardless of the value of VDD. They will not clamp the bus lines low even if the device is powered down.
Superior performance, low power, and small size make the MIC281 an excellent choice for cost-sensitive thermal management applications.
Package Type
MIC281 6-Lead SOT23 (M6)
(Top View)
VDD 1 GND 2
T1 3
6 NC 5 DATA 4 CLK
2020 Microchip Technology Inc.
DS20006468A-page 1
Typical Application Circuit
3.3V
TO SERIAL BUS
HOST
MIC281 SOT23-6
Nȍ PULL-UPS
5 DATA 4 CLK
VDD 1 T1 3
GND 2
0.1μF 2000p...
