> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # SparkFun Qwiic EEPROM Breakout - 512Kbit **Type:** Product page · **SKU:** COM-18355 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-qwiic-eeprom-breakout-512kbit.html ([markdown](https://core-electronics.com.au/sparkfun-qwiic-eeprom-breakout-512kbit.html.md)) The SparkFun Qwiic EEPROM Breakout is a simple and cost effective option to add some extra storage space to any project... ## Pricing - **Price:** $8.75 (inc GST) — $7.95 AUD, exc GST - **Quantity discounts:** 5+ $7.72 (exc GST) · 25+ $7.55 (exc GST) · 100+ $7.24 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 2 today, and up to 13 more in 5–11 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=COM-18355:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/COM-18355:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description The SparkFun Qwiic EEPROM Breakout is a simple and cost effective option to add some extra storage space to any project. With 512 kilo-bits (or 64 kilo-bytes) of storage, this product is great for any microcontroller that doesn't have any EEPROM storage space, like the SAMD21. You can use the Qwiic EEPROM for storing data like GPS waypoints and other user settings that need to be maintained between sketch uploads. The SparkFun Qwiic EEPROM has three address jumpers, allowing for up to eight EEPROMs on one bus. All communication is enacted exclusively via I2C, utilizing our handy Qwiic system (as the name implies). However, Sparkfun still have broken out 0.1" spaced pins in case you prefer to use a breadboard. The on-board CAT24C512 IC is a 512Kb EEPROM flash memory, organized as 65,536 words of 8 bits each with a 128-byte page write buffer. An on board ECC (Error Correction Code) makes this EEPROM suitable for high reliability applications. The IC also offers write protection, which inhibits write operations by pulling the WP pin High (protects the entire memory). The external address pins make it possible to connect up to eight CAT24C512 EEPROM chips on the same I2C bus. We've also made sure to write an Arduino library to make using this and any EEPROM easy to use. Check it out by searching 'SparkFun EEPROM' from the Arduino library manager or by downloading the repo directly. **Note:** The I2C address of the EEPROM - 512Kbit is 0x50 and is jumper selectable to 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, or 0x57. A multiplexer/Mux is required to communicate to multiple EEPROM - 512Kbit sensors on a single bus. If you need to use more than one EEPROM Breakout consider using the [Qwiic Mux Breakout](https://core-electronics.com.au/search/?q=16784). **Specifications** - Power: 3.3V - Dimensions: 25.4 x 25.4mm - CAT24C512 EEPROM: - Supply Current: - Read Current: 1mA - Write Current: 1.8mA - 2.5mA - Memory: 512-Kb (kilobit) - Page Write Buffer: 128 bytes - Reliability: - Endurance: 1,000,000 Program/Erase Cycles - Data Retention: 100 Years - Write Protection - I2C Address (7-bit): - **0x50 (Default)**, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57 - 2x Qwiic Connectors - [Schematic](https://core-electronics.com.au/attachments/localcontent/Qwiic_EEPROM_schematic_111737cfee7.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/Qwiic_EEPROM_1773106fb21.zip) - [Board Dimensions](https://core-electronics.com.au/attachments/localcontent/Qwiic_EEPROM_dimensions_13211ad193a.pdf) - [Hookup Guide](https://learn.sparkfun.com/tutorials/1661) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/CAT24C512-D_3714094cfd8.PDF) (CAT24C512) - [Qwiic Information Page](https://www.sparkfun.com/qwiic) - [SparkFun External EEPROM Arduino Library](https://github.com/sparkfun/SparkFun_External_EEPROM_Arduino_Library) - [SparkFun Qwiic EEPROM Python Package](https://github.com/sparkfun/Qwiic_EEPROM_Py) - [ReadtheDocs](https://qwiic-eeprom-py.readthedocs.io/en/latest/?) - [GitHub Hardware Repository](https://github.com/sparkfun/Qwiic_EEPROM_Breakout) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_438.jpg)