{"product_id":"adafruit-24lc32-i2c-eeprom-breakout-32kbit-4-kb-stemma-qt","title":"Adafruit 24LC32 I2C EEPROM Breakout - 32Kbit \/ 4 KB","description":"\u003cp\u003eIf you want to store calibration values, MAC addresses, non-secure access tokens, or other unique identifiers, EEPROM storage is a great option.\u003c\/p\u003e\n\u003cp\u003eEEPROM is long lasting, and doesn't need to be written in pages - a single byte can be written at once (unlike with flash memory!) EEPROM storage persists even when the power goes out, and can be over-written literally one million times.\u003c\/p\u003e\n\u003cp\u003eSome microcontrollers, like the ATmega328, have built in EEPROM, usually around 64 to 1024 bytes of it. But some, especially ARM Cortex's, don't! What then? that's where this petite Adafruit 24LC32 I2C EEPROM Breakout comes in to help! With 32 Kbit (4 KByte) of storage, and handy chainable Stemma QT connectors, it's just the right amount of simple I2C-controllable storage. Since its external to your microcontroller or microcomputer, uploading new flash memory won't wipe the data from this chip.\u003c\/p\u003e\n\u003cp\u003eWe use the CAT24C32 (or equivalent) EEPROM, internally organized as 4096 words of 8 bits each. It features a 32 byte page write buffer (if you want to write faster than one byte at a time). Use 2 to 5V power\/logic and up to 1 MHz clocked I2C. The default I2C address is 0x50 and there are three external address pins \/ jumpers to allow addressing of up to eight EEPROM devices on the same bus.\u003c\/p\u003e\n\u003cp\u003eTo make things easier and a bit more flexible, Adafruit have also included \u003ca href=\"\/en-eu\/collections\/qwiic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSparkFun Qwiic\u003c\/a\u003e compatible \u003ca href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSTEMMA QT\u003c\/a\u003e connectors for the I2C bus so you don't even need to solder! Just plug in a compatible cable and attach it to your MCU of choice, and you’re ready to store and retrieve from a reliable and durable EEPROM. \u003ca href=\"\/en-eu\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eQT Cable is not included, but we have a variety in the shop.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eFor Arduino usage, \u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_FRAM_I2C\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ewe recommend the Adafruit FRAM\/EEPROM library\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL DETAILS\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports Standard, Fast and Fast−Plus I2C Protocol\u003c\/li\u003e\n\u003cli\u003e1.7 V to 5.5 V Supply Voltage Range\u003c\/li\u003e\n\u003cli\u003e32−Byte Page Write Buffer\u003c\/li\u003e\n\u003cli\u003eHardware Write Protection for Entire Memory\u003c\/li\u003e\n\u003cli\u003eSchmitt Triggers and Noise Suppression Filters on I2C Bus Inputs (SCL and SDA)\u003c\/li\u003e\n\u003cli\u003eLow Power CMOS Technology\u003c\/li\u003e\n\u003cli\u003e1,000,000 Program\/Erase Cycles\u003c\/li\u003e\n\u003cli\u003e100 Year Data Retention\u003c\/li\u003e\n\u003cli\u003eDefault I2C address 0x50\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.4mm x 17.7mm x 4.5mm \/ 1.0\" x 0.7\" x 0.2\"\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":39393870741587,"sku":"ADA5146","price":3.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/5146-00.jpg?v=1625842796","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-24lc32-i2c-eeprom-breakout-32kbit-4-kb-stemma-qt","provider":"Pimoroni Ltd","version":"1.0","type":"link"}