DS1302Z+MSK

The DS1302 is a trickle-charge real-time clock IC that integrates an RTC/calendar and 31 bytes of non-volatile static RAM. It communicates with a microprocessor via a simple serial interface. The RTC/calendar counts seconds, minutes, hours, days, weeks, months, and years, with automatic end-of-month date adjustment and leap year correction. The clock supports 24-hour or 12-hour format with AM/PM indication. The 31-byte RAM is available for temporary storage of critical data. Synchronous serial communication simplifies microprocessor connectivity, requiring only three lines: RST (reset), I/O (data line), and SCLK (serial clock). Data can be transferred in single-byte or multi-byte (up to 31 bytes) format. The IC features extremely low power consumption, drawing less than 10µW while maintaining data and timekeeping.

Applications

• Multi-rate energy meter
• IC card water meter
• IC card gas meter
• Fax machine
• Portable instruments
• Mobile phone

Key features

• 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 supply voltage range: 2.0V ~ 5.5V
• Current consumption less than 1µA at 2.0V
• Single-byte or multi-byte data transfer for clock or RAM read/write
• Simple 3-wire interface for MCU communication
• TTL compatible (Vcc = 5V)
• Optional industrial temperature range: -40°C ~ +85°C
• Package options: DIP-8 and SOP-8