TDSEMIC DS1302Z-TD

The DS1302Z trickle-charge timekeeping circuit incorporates a real-time clock/calendar and 31 bytes of static RAM, communicating with a microprocessor via a simple serial interface. The real-time clock/calendar provides year, month, date, hour, minute, and second information. End-of-month date is automatically adjusted for months with fewer than 31 days, with leap year correction capability. The clock operates in either 12-hour or 24-hour format with an AM/PM indicator. In addition to timekeeping, the device features dual power supply pins (primary power VCC1 and backup power VCC2) and 31 bytes of scratchpad RAM. It is available in an SOP8 package.

• Real-time clock computes year, month, day, hour, minute, second, and day-of-week, valid through 2100, with leap-year compensation.
• 31 x 8-bit general-purpose scratchpad RAM.
• Serial I/O for minimum pin count.
• Wide operating voltage range: 2.0V to 5.5V.
• Operating current less than 300nA at 2.0V.
• Single-byte or multi-byte (burst mode) data transfer for clock or RAM read/write.
• 8-pin DIP or optional 8-pin surface-mount SOP package.
• Simple 3-wire interface.
• TTL-compatible (VCC = 5V).
• Operating temperature range: -40℃ to +85℃.

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