Replaces X25643/X25645
X5643/X5645
CPU Supervisor with 64Kbit SPI EEPROM
FEATURES
• Selectable watchdog timer • Low VCC detection and reset assertion
—Five standard reset threshold voltages —Re-program low VCC reset threshold voltage
using special programming sequence —Reset signal valid to VCC = 1V • Determine watchdog or low voltage reset with a volatile flag bit • Long battery life with low power consumption —<50µA max standby current, watchdog on —<1µA max standby current, watchdog off —<4.