X4043 Datasheet | Intersil

® X4043, X4045 4k, 512 x 8 Bit Data Sheet September 30, 2005 FN8118.1 CPU Supervisor with 4kbit EEPROM Features - Selectable watchdog timer - Low VCC detection and reset assertion - Five standard reset threshold voltages - Adjust low VCC reset threshold voltage using special programming sequence - Reset signal valid to VCC = 1V - Low power CMOS - <20µA max standby current, watchdog on - <1µA standby current, watchdog OFF - 3m A active current - 4kbits of EEPROM - 16-byte page write mode - Self-timed write cycle - 5ms write cycle time (typical) - Built-in inadvertent write protection - Power-up/power-down protection circuitry - Protect 0, 1/4, 1/2, all or 16, 32, 64 or 128 bytes of EEPROM array with Block Lock™ protection - 400k Hz 2-wire interface - 2.7V to 5.5V power supply operation .. - Available packages - 8 Ld SOIC - 8 Ld MSOP - 8 Ld PDIP - Pb-free plus anneal available (Ro HS pliant) BLOCK DIAGRAM Watchdog Transition Detector WP SDA Data Register mand Decode & Control Logic VCC Threshold Reset logic Block Lock Control Protect Logic Status Register EEPROM Array 2Kbits 1Kb...