Analog Devices DS1554WP-120+ 实时时钟 256k 非易失性，符合Y2K标准的时间保持器

Function: Calendar, Clock, NV Timekeeping RAM, Watchdog Timekeeper

Date Format: YY-MM-DD-dd

Time Format: HH:MM:SS (24 hr)

Mounting Style: SMD/SMT

RTC Memory Size: 32 kB

RTC Bus Interface: Parallel

Moisture Sensitive: Yes

Supply Voltage - Max: 3.63 V

Supply Voltage - Min: 2.97 V

Battery Backup Switching: Backup Switching

Maximum Operating Temperature: + 70 C

Minimum Operating Temperature: 0 C