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When the module DS1302 real-time clock module with battery CR2032



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Seller Name : Mod N Shields
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 DS1302 real-time clock module

DALLAS DS1302 is introduced trickle charge the clock chip, containing a real-time clock / calendar and 31 bytes of static RAM, communicates via a simple serial interface to the microcontroller. Real-time clock / calendar circuit provides seconds, minutes, hours, days, weeks, months, years of information, the number of days per month and leap year days can be automatically adjusted. Clock operation may indicate decided to use 24 or 12-hour format by AM / PM. It can be easily used between the DS1302 and microcontroller synchronous serial communication mode, only use three port lines: 1 RST reset 2 I / O data lines 3 SCLK Serial Clock. Clock / RAM read / write data to a byte or up to 31-byte character set way communication. When DS1302 work to maintain low power consumption data and clock information power less than 1mW

DS1302 key performance indicators:
 real-time clock can be calculated in 2100 having earlier second, minute, hour, day, week, month, year capacity, as well as the ability to leap year adjustment
 31 8 Wei temporary data storage RAM
 serial I / O ports such a way that a minimum number of pins
 Wide range of operating voltage 2.0 5.5V
 When working current 2.0V, less than 300nA
There are two single-byte transfer mode transmission and multi-byte character set transmission mode ? read / write clock or RAM data
 8-pin DIP or optional 8-pin SOIC surface mount package according to
 simple 3-wire interface
 compatible with TTL Vcc = 5V
 Optional industrial temperature range of -40 to +85
 dual supply pipe for the main power supply and backup power supply

DS1302 real-time clock module parameters are as follows:

1.PCB single panel, size: 44mm * 23mm * 1.6mm

2. with four positioning holes, diameter 3.1mm

3. backup battery is celestial CR2032, Voltage 3V, current 260mAh, non-rechargeable batteries. Theoretical data retention time is more than 10 years!

4. Crystal 32.768KHz, Japan crystal, matching capacitance 6pF, size 2 * 6mm

5.DS1302 8 pin DIP made large chip, chip below IC holder for easy replacement and swap chips

6. module operating voltage compatible 3.3V / 5V, can be connected with 5V and 3.3V microcontroller

7. Working temperature: 0 --- 70

Wiring methods (procedures to provide an example, you can access any IO port, modify the port can be defined in the program):

VCC + 5V / 3.3V






1.VCC and GND Do not reversed, so as not to burn chips

2.51 MCU P0 port need pull-up resistors, if your device does not have pull-up resistor can be connected to other ports data lines


1.DS1302 a real-time clock module (with DS1302 chip and battery backup function test well before )

2.DS1302 Chinese data sheet, 1 part 1 English data sheet, 1 part block diagram, 51 MCU Driver 1 (please download their own)

Anti-static packaging


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Additional Information

SKU CC1212130331
Cash on Delivery No

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