Maxim Integrated DS1308U-18+ I2C 实时时钟 低电流 I C 实时时钟，带 56 字节非易失性 RAM

Function: Calendar, Clock

Date Format: YY-MM-DD-dd

Time Format: HH:MM:SS:hh (12 hr, 24 hr)

Unit Weight: 130.045 mg

Mounting Style: SMD/SMT

RTC Memory Size: 56 B

RTC Bus Interface: I2C

Supply Voltage - Max: 5.5 V

Supply Voltage - Min: 1.71 V

Battery Backup Switching: Backup Switching

Maximum Operating Temperature: + 85 C

Minimum Operating Temperature: - 40 C