Parallax DS1302 Real Time Clock Module

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.

Features:

• 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 ICs 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.

DS1302 Real Time Clock 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)