Adafruit 24LC32 I2C EEPROM Breakout - 32Kbit / 4 KB - Stemma QT

The Adafruit 24LC32 I2C EEPROM Breakout provides 32 Kbit (4 KB) of reliable, non-volatile storage over a simple I2C interface. Store calibration values, MAC addresses, access tokens, or any data that needs to persist through power cycles and firmware updates — without the page-write constraints of flash memory.

Built around the CAT24C32 (or equivalent) EEPROM chip, this breakout supports single-byte writes as well as faster 32-byte page writes. STEMMA QT / Qwiic connectors make wiring effortless — just plug in a compatible cable with no soldering required. Three address jumpers allow up to eight EEPROMs on the same I2C bus.

Key Features

• 32 Kbit (4 KB) EEPROM – Organised as 4,096 words of 8 bits each
• I2C Interface – Up to 1 MHz clock speed; default address 0x50
• Single-Byte and Page Write – Write one byte at a time or up to 32 bytes per page
• 1 Million Write Cycles – Durable and long-lasting storage
• STEMMA QT / Qwiic Connectors – Plug-and-play I2C with no soldering
• Chainable – 3 address jumpers allow up to 8 devices on the same bus
• 2-5V Power and Logic – Compatible with virtually any microcontroller or microcomputer
• Independent of Flash – Data persists through firmware uploads and power cycles

Ideal For

• Storing calibration data and device configuration
• MAC addresses, access tokens, and unique identifiers
• Data logging with non-volatile persistence
• Projects on ARM Cortex microcontrollers without built-in EEPROM

Package Contents

• 1× Adafruit 24LC32 I2C EEPROM Breakout