DS1302 Real Time Clock Module

Real time clock with the year 2100 to calculate the seconds, minutes, hours, days, weeks, months, years, the ability, as well as the ability to leap year adjustment
 
simple 3-wire interface
Vcc = 5V and TTL-compatible
Optional industrial temperature range -40 to +85
Dual power tube for the main power and backup power supply 
Wide range of operating voltage 2.0 5.5V 
Current 2.0V, less than 300nA 
temporary data storage RAM 
Serial I / O port pin makes the least number of ways 
Read / write clock or RAM data trans when there are two single-byte transmit and multi-byte character sets transfer mode 
8-pin DIP package or optional 8-pin SOIC package assembly according to the surface 
Size : 44mmX23mmX1.6mm / 1.7''X0.9''/0.06'' ( approx ) 
Working Temperature: 0°~+70° 
Operating Voltage Range:3.3v ~ 5V 
Note : Do not reverse VCC and GND, will it cause damage