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DS1500

Dallas Semiconducotr
Part Number DS1500
Manufacturer Dallas Semiconducotr
Description Y2K Watchdog RTC
Published Sep 21, 2005
Detailed Description DS1500 Y2K Watchdog RTC with Nonvolatile Control www.maxim-ic.com GENERAL DESCRIPTION The DS1500 is a full-function, ye...
Datasheet PDF File DS1500 PDF File

DS1500
DS1500

Overview
DS1500 Y2K Watchdog RTC with Nonvolatile Control www.
maxim-ic.
com GENERAL 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.
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 Operation Precision Power-On Reset Power-Control Circuitry Supports System PowerOn 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 Industrial Temperature Range: -40°C to +85°C § § § § § § § § § § § § APPLICATIONS Remote Systems Battery-Backed Systems Telecom Switches Office Equipment Consumer Electronics ORDERING INFORMATION PART DS1500YEN DS1500WEN TEMP RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 32 TSOP 32 TSOP PIN CONFIGURATION TOP VIEW Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Dallas Semiconductor DS1500 TSOP Note: Some revisions of this device may incorporate deviations from published specifications known as errata.
Multiple revisions of any device may be simultaneously available through various sales channels.
For information about device errata, click here: www.
maxim-ic.
com/errata.
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