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PDF TC74A5 Data sheet ( Hoja de datos )
| Número de pieza | TC74A5 | |
| Descripción | Tiny Serial Digital Thermal Sensor | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TC74A5 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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TC74
Tiny Serial Digital Thermal Sensor
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:
- 200µA Operating
- 5µA 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
TO-220
TC74
12 345
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
200µA typ, (5µA 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
Internal Sensor
(Diode)
∆∑ Modulator
Serial Port
Interface
Control
Logic
SDA
SCL
Temperature
Register
SOT-23
SDA
SCLK
54
TC74
1 23
NC GND VDD
© 2002 Microchip Technology Inc.
DS21462B-page 1
1 page  
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin Number Pin Number
(5-Pin SOT-23) (5-Pin TO-220)
11
23
35
44
52
Symbol
NC
GND
VDD
SCLK
SDA
TC74
Type
None
Power
Power
Input
Bi-directional
Description
No Internal Connection.
System Ground
Power Supply Input
SMBus Serial Clock
SMBus Serial Data
© 2002 Microchip Technology Inc.
DS21462B-page 5
5 Page 
TC74
5.2 Taping Forms
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
Device
Marking
User Direction of Feed
W
5.3
PIN 1
P
Standard Reel Component Orientation
TR Suffix Device
(Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size
Package
5-Pin SOT-23A
Carrier Width (W)
8 mm
Pitch (P)
4 mm
Part Per Full Reel
3000
Reel Size
7 in
Package Dimensions
SOT-23A-5
.075 (1.90)
REF.
.122 (3.10)
.098 (2.50)
.071 (1.80)
.059 (1.50)
.020 (0.50)
.012 (0.30)
PIN 1
.037 (0.95)
REF.
.122 (3.10)
.106 (2.70)
.057 (1.45)
.035 (0.90)
.006 (0.15)
.000 (0.00)
10° MAX.
.024 (0.60)
.004 (0.10)
.010 (0.25)
.004 (0.09)
Dimensions: inches (mm)
© 2002 Microchip Technology Inc.
DS21462B-page 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TC74A5.PDF ] | |
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