Overview

• Onboard serial RTC chip DS1302
• Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
• Optional format : 24-hour OR 12-hour with an AM/PM indicator
• Supports trickle-charge for the backup battery
• Universal 32.768kHz crystal
• Onboard battery holder
• Features SPI interface, supports 3-wire and/or 4-wire sync serial communication

Specifications

• Operating voltage: 2.0V ~ 5.5V
• Backup battery voltage : 3.0V ~ 5.0V
• Operating temperature : 0°C ~ +70°C
• Power consumption : <1mW (keeping Clock and RAM data)
• Dimension : 31mm * 15mm

Applications

• Hand-held device
• Electronic watch
• Electronic clock

Photos

Downloads

Development resources: demo codes, schematic, datasheets, etc.
Wiki: www.waveshare.com/wiki/DS1302_RTC_Board