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PCF85163 - Real-time clock and calendar
X1227 - Real Time Clock/Calendar/CPU Supervisor with EEPROM
FCM7004 - Digital Clock Calendar
X1228 - Real Time Clock/Calendar/CPU Supervisor with EEPROM
MSM6242B - DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR
X1243 - Real Time Clock/Calendar/Alarm with EEPROM
HYM8563S - I2C Real Time Clock/Calendar
X1288 - RTC Real Time Clock/Calendar/CPU Supervisor
FCM7001 - Digital Clock Calendar
X1226 - Real Time Clock/Calendar with EEPROM
X1227 - RTC Real TimeClock/Calendar/ CPU Supervisor
X1226 - Real Time Clock/Calendar
X1286 - Intersil Real Time Clock/Calendar/CPU Supervisor with EEPROM X1286
X1228 - Real Time Clock/Calendar/CPU Supervisor
PCF8563 - Real-time clock/calendar
X1240 - Real Time Clock/Calendar with EEPROM
X1288 - 2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
PCA2125 - SPI Real-time clock/calendar
PCB8573 - Clock / Calendar
HYM8563 - I2C real-time clock / calendar chip