DESCRIPTION

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.

FEATURES

• 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