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21462C

21462C

  • 厂商:

    MICROCHIP

  • 封装:

  • 描述:

    21462C - Tiny Serial Digital Thermal Sensor - Microchip Technology

  • 详情介绍
  • 数据手册
  • 价格&库存
21462C 数据手册
M Tiny Serial Digital Thermal Sensor 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 µA (typ.) Operating Current - 5 µA (typ.) Standby Mode Current TC74 General Description The TC74 is a serially accessible, digital temperature sensor particularly suited for low cost and small formfactor 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 2wire 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 µA (typ). During standby operation, the quiescent current is 5 µA (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. 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 Functional Block Diagram Package Types TO-220 SDA 5 TC74 12345 Internal Sensor (Diode) SDA Serial Port Interface SCLK SOT-23 SCLK 4 TC74 1 2 GND 3 VDD Temperature Register ∆Σ Modulator Control Logic  2002 Microchip Technology Inc. NC SDA GND SCLK VDD NC Note: The TO-220 tab is connected to pin 3 (GND) DS21462C-page 1 TC74 1.0 1.1 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings† Supply Voltage (VDD) ............................................ +6V Voltage On Any Pin ....... (GND – 0.3V) to (VDD + 0.3V) Current On Any Pin .......................................... ±50 mA Operating Temperature (TA) ........ -40°C ≤ TA ≤ +125°C Storage Temperature (TSTG) .............. -65°C to +150°C Junction Temperature (TJ)................................ +150°C † Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. DC CHARACTERISTICS Electrical Specifications: U nless otherwise noted, VDD = 3.3V for TC74AX-3.3VXX and VDD = 5.0V for TC74AX-5.0VXX, -40°C ≤ TA ≤ 125°C. Note 5 Parameters Power Supply Power-on Reset Threshold Supply Voltage Operating Current Standby Supply Current Temperature-to-Bits Converter Temperature Accuracy TERR -2.0 -3.0 — 4 0.8 x VDD — — — — -1.0 10 4.7 4.0 — — ±2.0 8 — — — — 5.0 0.1 — — — +2.0 +3.0 — — — 0.2 x V DD 0.4 0.6 — 1.0 100 — — °C +25°C
21462C
1. 物料型号: - TC74系列数字温度传感器,具体型号包括TC74A0-3.3VCT至TC74A7-3.3VCT(SOT-23封装)和TC74A0-5.0VCT至TC74A7-5.0VCT(TO-220封装),其中“3.3V”和“5.0V”表示为3.3V和5.0V供电优化的版本。

2. 器件简介: - TC74是一款串行可访问的数字温度传感器,特别适用于低成本和小尺寸应用。温度数据由板上的热感测元件转换,并提供为8位数字字。

3. 引脚分配: - SOT-23-5或TO-220封装,具体引脚如下: - SOT-23封装:NC(1), GND(2), VDD(3), SCLK(4), SDA(5)。 - TO-220封装:NC(1), GND(3), VDD(5), SCLK(4), SDA(2)。TO-220封装的标签连接到引脚3(GND)。

4. 参数特性: - 供电电压2.7V至5.5V。 - 工作电流200μA(典型值),待机模式电流5μA(典型值)。 - 温度分辨率1°C,转换率8次/秒。 - 精度:+25°C至+85°C时±2°C,0°C至+125°C时±3°C。

5. 功能详解: - TC74通过其板载固态传感器获取和转换温度信息,具有±1°C的分辨率。数据存储在内部寄存器中,可通过串行端口读取。系统接口为从设备SMBus/I2C端口,允许随时读取温度数据。TC74具有8个可编程的SMBus/I2C地址,支持多传感器配置。还有低功耗待机模式,在此模式下,A/D转换器停止工作,温度数据寄存器被冻结,通过设置CONFIG寄存器中的SHDN位来启用待机模式。

6. 应用信息: - 适用于硬盘驱动器和其他PC外围设备的温度保护、笔记本电脑的PC卡设备、低成本温控控制等。

7. 封装信息: - 提供SOT-23-5和TO-220两种封装类型,具体尺寸和标记信息在文档中有详细描述。
21462C 价格&库存

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