X1243S8 Datasheet

16K (2K x 8), 2-Wire RTC


Real Time Clock/Calendar/Alarm with EEPROM

The X1243 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.

• 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
• 2Kbytes of EEPROM
   - 64-byte page write mode
   - 3-bit Block Lock™ protection
• 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
• Small package options
   - 8-lead SOIC package, 8-lead TSSOP package




Manufacturer information


Intersil Corporation is a market leader in power management and precision analog technology for many of the most rigorous applications in the computing, consumer, and industrial markets. The company supplies a full range of power IC solutions including battery management, computing power, display power, regulators and controllers, and power modules; as well as precision analog components such as amplifiers and buffers, proximity and light sensors, data converters, timing products, optoelectronics and interface products. As a major supplier to the military and aerospace industries, Intersil’s product development methodologies reflect experience designing products to meet the highest standards for reliability and performance in challenging environments.

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