Slkor DS1302Z

The DS1302 trickle-charge real-time clock IC contains a real-time clock/calendar and 31 bytes of non-volatile static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar counts seconds, minutes, hours, days, weeks, months, and years. For months with fewer than 31 days, the end-of-month date is automatically adjusted, and leap year correction is also supported. The clock can operate in 24-hour format or 12-hour format with AM/PM indication. The 31 bytes of RAM can be used to temporarily store important data. Synchronous serial communication simplifies the interface between the DS1302 and a microprocessor. Only 3 wires are required to communicate with the clock/RAM: (1) RST (Reset), (2) I/O (data line), and (3) SCLK (serial clock). Data can be transferred in single-byte format, one byte at a time, or in multi-byte burst mode of up to 31 bytes. The DS1302 operates at very low power, consuming less than 1uW to retain data and clock information.

• Counts seconds, minutes, hours, days, weeks, months, and years with leap-year compensation
• 31-byte non-volatile static RAM for high-speed data scratchpad
• Wide operating supply voltage range: 2.0V ~ 5.5V
• Current consumption less than 300nA at 2.5V
• Single-byte or multi-byte data transfer for clock or RAM data read/write
• Simple 3-wire interface for MCU communication
• TTL compatible (VCC = 5V)
• Optional industrial temperature range: -40℃ to +85℃
• Package types: DIP8 and SOP8

• Multi-rate energy meters, IC card water meters, IC card gas meters
• Fax machines
• Portable instruments
• Mobile phones