Breadboard Friendly I2C Temperature Sensor - TC74A0
TO-220 packaged TC74A0 I2C temperature sensor in a breadboard-friendly pinout with ±2°C accuracy. Simple to integrate for basic temperature logging or monitoring where high precision is not required.
Pinout
- Pin 2 SDA2
I2C serial data. Adafruit states wiring is pin 2 is SDA.
Type · SignalVoltage · 3.3V or 5V logic supported by the product page. - Middle pin GND3
Ground return. Adafruit states the middle pin is GND.
Type · GroundVoltage · 0V ground reference. - Pin 4 SCL4
I2C serial clock. Adafruit states pin 4 is SCL.
Type · SignalVoltage · 3.3V or 5V logic supported by the product page. - Rightmost pin 5 VDD5
Sensor supply input. Adafruit states the rightmost pin 5 is VDD.
Type · PowerVoltage · 3.3V or 5V supply per the product page.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| Pin 2 SDA | 2 | Signal | I2C serial data. Adafruit states wiring is pin 2 is SDA. | 3.3V or 5V logic supported by the product page. |
| Middle pin GND | 3 | Ground | Ground return. Adafruit states the middle pin is GND. | 0V ground reference. |
| Pin 4 SCL | 4 | Signal | I2C serial clock. Adafruit states pin 4 is SCL. | 3.3V or 5V logic supported by the product page. |
| Rightmost pin 5 VDD | 5 | Power | Sensor supply input. Adafruit states the rightmost pin 5 is VDD. | 3.3V or 5V supply per the product page. |
Pin details
4 connections- Pin 2 SDA2
I2C serial data. Adafruit states wiring is pin 2 is SDA.
SignalVoltage · 3.3V or 5V logic supported by the product page. - Middle pin GND3
Ground return. Adafruit states the middle pin is GND.
GroundVoltage · 0V ground reference. - Pin 4 SCL4
I2C serial clock. Adafruit states pin 4 is SCL.
SignalVoltage · 3.3V or 5V logic supported by the product page. - Rightmost pin 5 VDD5
Sensor supply input. Adafruit states the rightmost pin 5 is VDD.
PowerVoltage · 3.3V or 5V supply per the product page.
Start wiring
I2C · SPI · Single data line · 3.3 – 5 V · Breakout
Confirm the data interface matches your host board.
Module pins: Rightmost pin 5 VDD, Middle pin GND. Schematik maps them to your board in the app.
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