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Serial real-time clock (RTC) with audio
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Serial I²C bus real-time clock (RTC) with battery switchover
NRND
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Low-power serial real-time clock (RTC) with alarm
Serial real-time clock (RTC) with built-in battery switchover circuit
3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM
5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM
5.0 V, 16 Kbit (2 Kb x 8) TIMEKEEPER® SRAM