Xicor X1240
Real Time Clock/Calendar with EEPROM
DESCRIPTION
2-Wire RTCFEATURES
● 2-Wire Interface interoperable with I2C. —400kHz data transfer rate● Secondary Power Supply Input with internal switch-over circuitry.
● Year 2000 Compliant
● 2K bytes of EEPROM —64 Byte Page Write Mode —3 bit Block Lock
● Low Power CMOS —<1µA Operating Current —<3mA Active Current during Program —<400µA Active Current during Data Read
● Single Byte Write Capability
● Typical Nonvolatile Write Cycle Time: 5ms
● High Reliability —1,000,000 Endurance Cycles —Guaranteed Data Retention: 100 Years
● Small Package Options —8-Lead SOIC Package, 8L TSSOP Package The X1240 is a Real Time Clock with clock/calendar circuits. The dual port clock register allows the clock to operate, without loss of accuracy, even during read and write operations. The clock/calendar provides functionality that is controllable and readable through a set of registers. The clock, using a low cost 32.768kHz crystal input, accurately tracks the time in seconds, minutes, hours, date, day, month and years.