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Article: 00069510

Real-time clock (RTCs)

IDT real-time clocks (RTC IC) are ultra-low-power clock/date devices with programmable time-of-day alarms and programmable square-wave outputs. These devices offer high noise immunity, low current consumption, 12/24 hour mode of operation, auto correction for leap year and programmable square wave output, making them ideal for a wide range of design applications.

IDT?s real-time clock ICs count seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100. The devices feature normal and fast-mode I2C interfaces, two time-of-day alarms, an oscillator stop flag, programmable square-wave outputs that default to 32 kHz on power-up, and operating voltages ranging from 1.8 to 5.5 V. The IDT 1338 real time clock IC includes a 56-Byte battery-backed non volatile RAM for data storage.

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