Features: • 2 Alarms - Interrupt Output
-Settable on the Second, 10s of Seconds,Minute, 10s of Minutes, Hour, Day, Month, or Day of the Week
-Repeat alarm for time base generation
• 2 Wire Interface interoperable with I2C.
-400kHz data transfer rate
• Secondary Power Supply Input with internal switch-over circuitry.
• Year 2000 Compliant
• Low Power CMOS
-<1mA Operating Current
-<3mA Active Current during Program
-<400mA Active Current during Data Read
• Typical Nonvolatile Write Cycle Time: 5ms
• High Reliability
-100,000 Endurance Cycles
-Guaranteed Data Retention: 100 Years
• Small Package Options
-8-Lead SOIC Package, 8L TSSOP PackagePinout
SpecificationsTemperature Under Bias..................... -65°C to +135°C
Storage Temperature ......................... -65°C to +150°C
Voltage on any pin with respect to ground..-1.0V to 7.0V
DC Output Current ...................................................5 mA
Lead Temperature (Soldering, 10 Seconds) ........ 300°C
Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.This is a stress rating only and the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe X1203 is a Real Time Clock with clock/calendar circuits and two alarms. The dual port clock and alarm registers allow 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 of X1203 , using a low cost 32.768kHz crystal input, accurately tracks the time in seconds, minutes, hours, date,day, month and years. It has leap year correction,automatic adjustment for the year 2000 and months with less than 31 days.
An alarm match of the RTC sets an interrupt flag and activates an interrupt pin. An alternative alarm function of X1203 provides a pulsed interrupt for long time constant timebases.
The X1203 offers a backup power input pin. This Vback pin allows the device to be backed up by a nonrechargeable battery. The RTC is fully operational from 2.5 to 6 volts.
X1203 Data Sheet
