Name: Adafruit PCT2075 I2C Temperature Sensor Breakout - STEMMA QT/Qwiic
SKU: TH2085
Price: 489.0 INR
Availability: InStock

Overview

Adafruit PCT2075 Temperature Sensor is an I2C temperature sensing breakout built around the NXP PCT2075, designed as a code-compatible, pin-compatible drop-in replacement for the popular LM75.

Compared with the LM75, the PCT2075 offers an 11-bit ADC for more precise temperature readings, and its tri-state address pins allow up to 27 sensors on a single I2C bus. That makes it a practical choice for distributed temperature monitoring, multi-sensor data logging, and embedded control projects.

The board also supports a configurable high-temperature threshold and alert output, so it can do more than just report temperature. With built-in STEMMA QT / Qwiic compatible connectors, it is easy to plug into Arduino, Feather, Raspberry Pi, and other compatible microcontrollers or Blinka-supported single-board computers. QT cable is not included.

Specification

Technical details for Adafruit PCT2075 I2C Temperature Sensor.

Specification	Details
Sensor IC	NXP PCT2075
Interface	I2C
ADC Resolution	11-bit
Operating Voltage	2.7V to 5.5V
Default I2C Address	0x37
Address Options	Tri-state A0, A1, A2 pins support up to 27 devices on one bus
Alert Function	Configurable high-temperature threshold with interrupt/alert output
Connector Type	STEMMA QT JST SH, compatible with SparkFun Qwiic
Software Support	Arduino and CircuitPython libraries with examples

Pinout

Pin	Type	Description
VCC	Power	Supply input for the breakout; use 2.7V to 5.5V to match your logic level
GND	Power	Common ground for power and logic
SCL	I2C	I2C clock line
SDA	I2C	I2C data line
INT	Output	Alert/interrupt output for temperature threshold events
A0, A1, A2	Address Select	Tri-state address pins used to configure the I2C address

Why choose the PCT2075?

If you already use LM75-style sensors, the PCT2075 is an easy upgrade path. It keeps the familiar I2C workflow while improving measurement precision and greatly expanding the number of address combinations available on the same bus.

This makes it well suited for environmental monitoring, thermal protection, enclosures, 3D printer projects, battery packs, and any application where you want a simple digital temperature sensor with an onboard alert feature.