The 24AA256/24LC256/ 24FC256 (24XX256*) is a 32K x 8 (256K bit) Serial Electrically Erasable PROM, capable of operation across a broad voltage range (1.8V to 5.5V). It has been developed for advanced, low power applications such as personal communications or data acquisition.
This document is a preliminary datasheet for the Microchip 24AA256, 24LC256, and 24FC256 devices, which are 256K bit (32K x 8) CMOS serial EEPROMs. The devices are designed for low-power applications such as personal communications and data acquisition, supporting a broad voltage range from 1.8V to 5.5V.
| Memory Capacity | 256K Bit (32K x 8) |
|---|---|
| Maximum Write Current | 3 mA at 5.5V |
| Maximum Read Current | 400 pA at 5.5V |
| Standby Current | 100 nA typical at 5.5V |
| Endurance | 100,000 erase/write cycles |
| Data Retention | > 200 years |
| ESD Protection | > 4000V |
| Clock Frequency (Industrial) | 400 kHz (2.5V < Vcc < 5.5V) |
| Write Cycle Time | 5 ms max |
The 24LC256 and 24FC256 operate with a supply voltage range of 2.5V to 5.5V.
Up to eight devices can be cascaded on the same bus using different chip select bit combinations.
The maximum write cycle time for a byte or page is 5 ms.