Модуль DS3231 RTC 3.3В/5В, 3PCS

A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, provide a reset output, and if necessary, automatically switch to the backup power supply. In addition, / RST pin is monitored as generating μP reset manually.Module parameters:1 Size: 38mm (length) * 22mm (W) * 14mm (height)2 Weight: 8g3 Operating voltage :3.3 - 5 .5 V4 clock chip: high-precision clock chip DS32316 calendar alarm clock with two7 programmable square-wave output8 Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation9 chip temperature sensor comes with an accuracy of ± 3 °10 memory chips: AT24C32 (storage capacity 32K)11. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)12 can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x5713 with rechargeable battery LIR2032, to ensure the system after power failure, the clock move any natural normal14 Packing: single anti-static packagingWiring instructions (for Arduino uno r3 for example):SCL A5SDA A4VCC 5VGND GND1. DS3231 module a (tested good antistatic packaging )Note: don't inclue battery, it only need 0.01 dollars, it's not safty to ship by air mail.hope you can understanding(2) an electronic file data (including test procedures for Arduino, PDF format schematics, data sheet)