DS1500WE+

MAXIM INTEGRATED PRODUCTS  DS1500WE+  芯片, 实时时钟

The is a Y2K watchdog RTC with non-volatile control in 32 pin TSOP package. It is a full-function, year 2000-compliant real time clock/calendar RTC with an alarm, watchdog timer, power-on reset, battery monitors, 256 bytes of on-board non-volatile NV SRAM, NV control for backing up an external SRAM and a 32.768KHz output. User access to all registers within the DS1500 is accomplished with a byte-wide interface. The RTC registers contain century, year, month, date, day, hours, minutes and seconds data in 24-hour binary-coded decimal BCD format. Corrections for day of month and leap-year compensation valid up to the year 2100. Power control circuitry supports system power-on from date/day/time alarm or key closure. The DS1500 is used in remote systems, battery backed systems, telecom switches and office equipments.

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Supply voltage range is 3V to 3.6V

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Operating temperature range from 0°C to 70°C

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Programmable watchdog timer and RTC alarm

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Day of week/date alarm register

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Automatic battery backup and write protection to external SRAM

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Precision power-on reset

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256bytes user non-volatile RAM

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Auxiliary battery input

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Accuracy better than ±1 minute/month at +25°C

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Battery voltage level indicator flags