X40620 - Xicor

X40620 Dual Voltage CPU Supervisor with 64K Serial EEPROM

The X40620 combines several functions into one device. The first is a dual voltage monitoring, power-on reset control, watchdog timer and 64Kbit serial BLOCK DIAGRAM WP Write Control Logic HV Generation Timing and Control Watchdog Timer Reset Reset & Watchdog Timebase Power on and Low Voltage Reset Generation V2FAIL + - RESET SCL SDA Command Decode and Co.

Features

• Dual Voltage Detection and Reset Assertion —Three standard reset threshold settings. (3.1V/ 2.6V, 3.1V/1.7V, 2.9V/2.3V) —Adjust low voltage reset threshold voltages using special programming sequence —RESET signal valid down to VCC=1V
• Watchdog Timer (150ms)
• Power On Reset (150ms)
• Low Power CMOS —10µA typical standby current, watchdog on —400µA typical standby current, watchdog off
• 64kbit 2-Wire Serial EEPROM —1MHz serial interface speed —64-byte page write mode —Self-timed write cycle —5ms write cycle time (typical)
• 2.5 to 3.7V Power Supply Operation
• 8-Lead TSSOP package DESCRIPT.