X25644 Datasheet | Xicor

64K 32K 16K X25644/46 X25324/26 X25164/66 Programmable Watchdog Timer w/Serial E2PROM DESCRIPTION 8K x 8 Bit 4K x 8 Bit 2K x 8 Bit Features - Programmable Watchdog Timer with Reset Assertion - Reset Signal Valid to Vcc=1V - Power Up Reset Control - Save Critical Data With Block Lock TM Protection - Block Lock TM Protect 0, 1/4, 1/2 or all of Serial E2PROM Memory Array - In Circuit Programmable ROM Mode - Long Battery Life With Low Power Consumption - <50µA Max Standby Current, Watchdog On - <1µA Max Standby Current, Watchdog Off - <5m A Max Active Current during Write - <400µA Max Active Current during Read - 1.8V to 3.6V, 2.7V to 5.5V and 4.5V to 5.5V Power Supply Operation - 2MHz Clock Rate - Minimize Programming Time - 32 Byte Page Write Mode - Self-Timed Write Cycle - 5ms Write Cycle Time (Typical) - SPI Modes (0,0 & 1,1) - Built-in Inadvertent Write Protection - Power-Up/Power-Down Protection Circuitry - Write Enable Latch - Write Protect Pin - High Reliability - Available...