The CAT24WC256 is a 256K-bit Serial CMOS EEPROM internally organized as 32,768 words of 8 bits each. It features a write protect function, supports 100,000 program/erase cycles, and has a data retention period of 100 years. It utilizes low power CMOS technology, has a 64-byte page write buffer, and operates via the I2C bus serial interface.
The CAT24WC256 is a 256‑Kbit serial CMOS EEPROM organized as 32,768 × 8 bits. It operates over a 1.8 V to 6 V supply and is available in 8‑pin DIP or SOIC packages. The device offers a 64‑byte page‑write buffer, write‑protect pin, and supports standard I²C bus operation up to 1 MHz.
The datasheet provides absolute‑maximum ratings, DC operating characteristics, timing diagrams, and detailed descriptions of read, write, and acknowledge procedures. Ordering information, revision history, and reliability data such as 100 k cycle endurance and 100‑year data retention are also included.
| Memory size | 256 Kbit (32,768 × 8 bits) |
|---|---|
| Supply voltage | 1.8 V to 6 V |
| Operating temperature range | -55 °C to +125 °C |
| Write endurance | 100 000 program/erase cycles per byte |
| Data retention | 100 years |
| Standby current | 10 µA (Automotive range) |
| Package options | 8‑pin DIP or 8‑pin SOIC |
The device operates from 1.8 V up to 6 V.
It is rated for 100 000 program/erase cycles per byte.
The EEPROM retains data for 100 years.
The part is offered in 8‑pin DIP and 8‑pin SOIC packages.