JXR4020 RTC Module
Size: 3.2×2.5×1.55mm
• SPI 3-wire interface
• Wide operating voltage range: 2.0V~5.5V
• Wide time-keeping voltage range: 1.1V~5.5V
• Built-in 32.768KHz crystal oscillator
• Low current power consumption: 600nA@3V(Typ)
• Operating temperature range: -40~85°C

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