DS1302Z+T&R-TUDI

The DS1302 trickle-charge real-time clock IC contains a real-time clock/calendar and a nonvolatile static RAM byte. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar counts seconds, minutes, hours, days, days of the week, months, and years, with automatic end-of-month date adjustment for months shorter than 31 days and leap-year correction. The clock operates in either 12-hour or 24-hour format. The RAM byte can be used for temporary storage of critical data. Synchronous serial communication simplifies the interface between the DS1302 and a microprocessor. Clock/RAM communication requires only three wires: (1) RST (reset), (2) I/O (data line), and (3) SCLK (serial clock). Data can be transferred in single-byte (one byte per transfer) or burst mode (up to 31 bytes). The DS1302 operates at extremely low power, consuming less than 1μW to retain data and clock information.

Applications

• Portable instruments
• Mobile phones
• Rechargeable meters, IC card water meters, IC card gas meters
• Electronic plotters

Key features

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