DS1302 Real Time Clock Module

SKU 29125 Categories ,


2 in stock

Quantity Discounts

Quantity Price
1 - 9 $3.99
10 - 19 $3.79
20+ $3.59

Product Description

The DS1302 Real-Time Clock Module provides a DS1302 real-time clock with a 32 kHz crystal and on-board battery backup, all in a small SIP module that can be easily plugged into a breadboard.

The DS1302 provides seconds, minutes, hours, date, day of week and year with leap-year compensation up to the year 2100. You can use 24-hour mode or 12-hour mode with AM/PM indication and there are 31 bytes of RAM that are also battery-backed. BASIC Stamp 2 example code is available under Downloads, and a Propeller Spin object is linked under Additional Resources.


  • On-board CR1220 battery holder
  • SPI interface supports 3-wire or 4-wire synchronous serial connection
  • Wide operating voltage supports 3.3V and 5V microcontrollers
  • Convenient SIP header makes breadboarding easy
  • Coin-cell battery included

Application Ideas:

  • Electronic Clock
  • Datalogger
  • Sprinkler Control Timer

NOTE: Do not enable the on-board DS1302 IC’s trickle-charging circuit. Because this module contains a lithium coin-cell battery for backup, enabling the trickle-charging circuit could damage the battery and/or module.

Key Specifications:

  •  Voltage requirements: 3.3-5 VDC
  •  Current requirements: 3.2 mA @ 5 VDC
  •  Communication: 3 or 4-wire Synchronous Serial (SPI) Interface
  •  Dimensions: 1.22 x 0.6 in (31.2 x 15.5 mm)
  •  Operating temperature range: +32 to +158 °F (0  to +70 °C)

Additional Information

Weight 0.0102 lbs
Dimensions 1 × 1 × 1 in


Additional information

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