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Feature

318 bit Temporary data storage RAM. Compatible with TTL/VCC=5V.
Serial I/O port mode makes the least number of pins.8 pin DIP package or optional 8 pin SOIC package based on surface assembly.
Read / write clock or RAM data when there are two ways to send a single byte transfer and multi byte character set.
Dual power supply use for main power supply and backup power supply.
With Ability to calculate seconds, minutes, hours, days, weeks, months, and years before 2100, as well as the ability to adjust the leap year.

Description

Specifications:
Wide operating voltage RANGE: 2-5.5v
Operating current: 2.0V/hour<300nA
Working temperature: -40 +85
Locating hole diameter: 3.1mm
Battery: CR2032 Lithium Cell 3V Button cell(Not included)
Current: 260mAh
Quantity: 5pcs
PCB size: approx. 44*19*1.2mm/1.73*0.74*0.04''
Net weight: approx. 30g
Wiring Manual:
VCC +5V/3.3V
GND GND
CLK P02
Note:
VCC and GND can not be picked up, or it will burn the chip.
51 MCU P0 port need to connect the pull resistance, if you do not have a single chip connected to the pull resistance, you can connect the data cable to other ports.
Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not reflect the actual color of the item.
Thanks for your understanding. 5 x Real Time Clock Modules