8. Octopus Real-time Clock(EF04005)#

8.1. Introduction#

OCTOPUS Real-time Clock is a clock module which can achieve counting for year, month, day, hour by using the DS1307 clock chip.

8.2. Products Link#

ELECFREAKS Octopus Real-Time Clock

8.3. Characteristics#

The chip works in a low voltage equipped with 56-byte non-volatile RAM clock calendar It has a complete BCD code real-time clock chip, address and data are passed through two-wire bidirectional serial bus, providing information such as seconds, minutes, hours, etc., and can automatically adjust the number of days per month. It can automatically set the time of the leap year. The chip has built-in power checking circuit that can check the power lost condition and switch the battery.

8.4. Specifications#

Item	Parameter
SKU	EF04005
Connector	Two-wire serial interface (IIC Communication)
Output	Programmable SQW
Detection	Automatic power failure detection and switching circuit
Power dissipation	In the standby battery mode, the power consumption is less than 500nA
Working temperature	-40℃ ~80℃
Power input	3v-5v
Connector type	Digital
Pins Definition	1-GND 2-VCC 3-SCK 4-SDA 5-RST