DS1500WE+

The DS1500WE+ 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.

• Supply voltage range is 3V to 3.6V
• Operating temperature range from 0°C to 70°C
• Programmable watchdog timer and RTC alarm
• Day of week/date alarm register
• Automatic battery backup and write protection to external SRAM
• Precision power-on reset
• 256bytes user non-volatile RAM
• Auxiliary battery input
• Accuracy better than ±1 minute/month at +25°C
• Battery voltage level indicator flags

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Clock & Timing, Consumer Electronics

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