Description of Clock IC DS1302ZN:

The DS1302 slow-charging real-time clock (RTC) chip includes 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 can count seconds, minutes, hours, days, weeks, months, and years. It automatically adjusts the end-of-the-month date for months with fewer than 31 days and features leap year correction. The clock can be in 24-hour format or a 12-hour format with AM (morning) or PM (afternoon). The 31-byte RAM can be used to temporarily store important data. Synchronous serial communication simplifies the communication between the DS1302 and the microprocessor. Communication with the clock/RAM requires only 3 lines: (1) RST (reset), (2) I/O (data line), and (3) SCLK (serial clock). Data can be transmitted in single-byte form, up to 31 bytes in multi-byte form. The DS1302 operates at very low power consumption, requiring less than 1µW to save data and clock information.

Clock IC DS1302ZN Features:

• Countable in seconds, minutes, hours, days, weeks, months, and years with leap year compensation

• 31-byte non-volatile RAM for high-speed data caching

• Wide operating voltage range: 2~5.5V

• 2.5V power consumption less than 300nA

• Single-byte or multi-byte data transmission method for clock or RAM data read/write

• Simple 3-wire interface for communication with the microcontroller

• TTL Compatible (VCC=5V)

• Optional industrial temperature range: -40℃ to +85℃

• Packaging: DIP8 and SOP8
  

Clock IC DS1302ZN Application Areas:

• Portable Instrument

• Mobile Phone

• Reactive Rate Energy Meters, IC Card Water Meters, IC Card Gas Meters

• Fax Machine
  

The maximum specifications for the clock IC DS1302ZN:

DC operating conditions for the clock IC DS1302ZN:

（TA=0℃~70℃）

Direct Current Characteristics of Clock IC DS1302ZN:

Direct Current Characteristics(0°C to 70°C; VCC=2.5V to 5.5V)

AC Characteristics(TA = 0°C to 70°C; VCC = +5V ±10%)