DS1500

Y2K-Compliant Watchdog RTC with NV Control


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Description

The DS1500 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 nonvolatile (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 as shown in Figure 7. 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 are made automatically.
DS1500: Typical Operating Circuit DS1500: Typical Operating Circuit Enlarge+

Key Features

  • BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100
  • Programmable Watchdog Timer and RTC Alarm
  • Century Register; Y2K-Compliant RTC
  • Automatic Battery Backup and Write Protection to External SRAM
  • +5V or +3.3V Operation
  • Precision Power-On Reset
  • Power-Control Circuitry Supports System Power-On from Date/Day/Time Alarm or Key Closure
  • 256 Bytes User NV RAM
  • Auxiliary Battery Input
  • Accuracy Better than ±1 Minute/Month at +25°C
  • Day-of-Week/Date Alarm Register
  • Battery Voltage-Level Indicator Flags
  • Optional Industrial Temperature Range: -40°C to +85°C

Applications/Uses

  • Battery-Backed Systems
  • Consumer Electronics
  • Office Equipment
  • Remote Systems
  • Telecom Switches
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Belle Isle 2020
05/29/2020 - 05/31/2020, Detroit, MI
2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

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