Technical data sheet for Microchip's 25AA/25LC SPI Serial EEPROM family covering features, electrical specs, timing and package options.
The 25AA/25LC series are SPI‑compatible serial EEPROMs offered by Microchip in densities from 1 Kbit to 1 Mbit. The devices support byte‑ and page‑level write operations, multiple write‑protect modes, and are available in a variety of 8‑lead and surface‑mount packages.
The datasheet provides detailed electrical characteristics, timing diagrams, instruction sets, and functional descriptions needed for hardware designers and firmware developers to integrate these memories into microcontroller‑based systems.
| Maximum Clock Speed | 10 MHz (1 K‑256 K) / 20 MHz (512 K‑1 M) |
|---|---|
| Typical Write Current | 5 mA |
| Typical Read Current | 5 mA @ 10 MHz, 7 mA @ 20 MHz |
| Standby Current | 1 µA |
| Write Cycle Time | 5 ms max (1 K‑256 K), 6 ms max (512 K‑1 M) |
| Data Retention | > 200 years |
| ESD Protection | > 4000 V |
| Industrial Temperature Range | -40 °C to +85 °C |
| Automotive Temperature Range | -40 °C to +125 °C |
The devices operate up to 10 MHz for 1 K‑256 K densities and up to 20 MHz for 512 K‑1 M densities.
Typical standby current is 1 µA.
The automotive‑rated parts operate from –40 °C to +125 °C.