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TC77-5.0MOA Datasheet(PDF) 1 Page - Microchip Technology

No. de pieza TC77-5.0MOA
Descripción Electrónicos  Thermal Sensor with SPI Interface
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

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 2002 Microchip Technology Inc.
DS20092A-page 1
M
TC77
Features
• Digital Temperature Sensing in 5-Pin SOT-23A
and 8-Pin SOIC Packages
• Outputs Temperature as a 13-Bit Digital Word
• SPI and MICROWIRE™ Compatible Interface
• Solid State Temperature Sensing
• ±1°C (max.) accuracy from +25°C to +65°C
• ±2°C (max.) accuracy from -40°C to +85°C
• ±3°C (max.) accuracy from -55°C to +125°C
• 2.7V to 5.5V Operating Range
•Low Power
- 250 µA (typ.) Continuous Conversion Mode
- 0.1 µA (typ.) Shutdown Mode
Typical Applications
• Thermal Protection for Hard Disk Drives and
Other PC Peripherals
• PC Card Devices for Notebook Computers
• Low Cost Thermostat Controls
• Industrial Control
• Office Equipment
• Cellular Phones
• Thermistor Replacement
Block Diagram
Description
The TC77 is a serially accessible digital temperature
sensor particularly suited for low cost and small form-
factor applications. Temperature data is converted from
the internal thermal sensing element and made avail-
able at anytime as a 13-bit two’s compliment digital
word. Communication with the TC77 is accomplished
via a SPI and MICROWIRE compatible interface. It has
a 12-bit plus sign temperature resolution of 0.0625°C
per Least Significant Bit (LSb). The TC77 offers a tem-
perature accuracy of ±1.0°C (max.) over the tempera-
ture range of +25°C to +65°C. When operating, the
TC77 consumes only 250 µA (typ.). The TC77’s Con-
figuration register can be used to activate the low
power Shutdown mode, which has a current consump-
tion of only 0.1 µA (typ.). Small size, low cost and ease
of use make the TC77 an ideal choice for implementing
thermal management in a variety of systems.
Package Types
Typical Application
TC77
Diode
Temperature
Sensor
VDD
SCK
CS
Serial
Port
Interface
SI/O
13-Bit
Sigma Delta
A/D Converter
Register
Temperature
Register
Internal
Configuration
Manufacturer
ID Register
VSS
SOT-23-5
1
SOIC
1
VDD
VSS
SCK
SI/O
CS
TC77
TC77
SCK
SI/O
VSS
NC
CS
VDD
NC
NC
AN0
SCK
SDI
CS
SCK
SI/O
TC77
0.1µF
VDD
VSS
VDD
PICmicro®
MCU
Thermal Sensor with SPIInterfa
ce


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