The document introduces the features and characteristics of Xicor X25650 5MHz SPI Serial E2PROM 64K 8K x 8 Bit.
The X25650 serial EEPROM provides 64 Kbits (8K × 8) of non‑volatile memory organized for SPI operation up to 5 MHz. It features low standby current (<1 µA), low active current (<5 mA), block‑lock protection for 1/4, 1/2 or full array, and optional hardware write‑protect via the WP pin and WPEN bit. The device operates from 2.5 V to 5.5 V and includes ESD protection of 2000 V on all pins.
Pin functions include CS, SI, SO, SCK, WP, HOLD and VCC. The device supports standard SPI modes (0,0 and 1,1) and allows page writes of up to 32 bytes. Detailed timing diagrams, status register bits, and write‑enable sequences are provided, along with absolute maximum ratings and recommended operating conditions for commercial and industrial temperature ranges.
| Memory Size | 64 Kbits (8K × 8) |
|---|---|
| Clock Rate | 5 MHz |
| Standby Current | <1 µA |
| Active Current | <5 mA |
| Write Cycle Time | 5 ms (typical) |
| Endurance | 100 000 cycles |
| Data Retention | 100 years |
| ESD Protection | 2000 V on all pins |
| Operating Temperature (Commercial) | 0 °C to +70 °C |
| Operating Temperature (Industrial) | -40 °C to +85 °C |
The device operates up to a 5 MHz SPI clock rate.
Up to 32 bytes can be written in a single page write, provided they reside on the same page.
The WP (Write Protect) pin together with the WPEN bit in the status register control hardware write protection.