Arduino DS1302 Real Time Clock Module (without battery inside)

DS1302 real-time clock module

he DS1302 timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM.

It communicates with a microprocessor via a simple serial interface.

The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap…

Module voltage compatible with 3.3V / 5V, can be connected to 3.3V or 5V SCM
3v 260mAh backup battery(not rechargeable batteries)
Crystal oscillator 32.768KHz
Working temperature 0°C to 70°C
4 positioning holes, diameter 3.1mm
Size: 44 x 23 x 1.6mm

Feature:
The real time clock has the ability of calculating prior to the 2100 second, minute, hour, day, week, month, year, and the ability to adjust a leap year
31 8 temporary data storage RAM
Serial I / O port pin makes the least number of ways
Wide range of operating voltage 2.0V – 5.5V
When The working voltage is 2.0V, the current is less than 300nA
Read/write clock or RAM data have two transmission way: Single-byte / many bytes group
8 feet DIP assembly or optional 8 feet SOIC encapsulation according to surface assembly
Simple 3 line interface
Optional industrial temperature range -40°C to +85°C
Dual power tube for the main power and backup power supply
TTL compatible(Vcc = 5V)

Note:
Do not reverse VCC and GND, it will cause damage.
It requires a pull-up resistor for P0 port of 51 MCU, if without, you can connect the data cable to other terminal.

Package included:
DS1302 real-time clock module without Battery