Real time clock module
SERIAL-INTERFACE REAL TIME CLOCK MODULE
RTC-4543SA/SB
Builtin crystal unit allows adjustment-free efficient operation. Automatic leap year correction. Output selectable between 32.768 KHz/1 Hz. Operating voltage range: 2.5V to 5.5V. Supply voltage detection voltage: 1.7±0.3V. Low current consumption: 1.0 µA/2.0V (Max.)
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