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DS1501YN+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1501YN+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 22 page DS1501/DS1511 Y2K-Compliant Watchdog Real-Time Clocks GENERAL DESCRIPTION The DS1501/DS1511 are full-function, year 2000- compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to all registers within the DS1501/DS1511 is accomplished with a byte-wide interface, as shown in Figure 8. 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. APPLICATIONS Remote Systems Battery-Backed Systems Telecom Switches Office Equipment Consumer Electronics Pin Configurations and Typical Operating Circuit appear at end of data sheet. 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 +3.3 (W) or +5V (Y) Operation Precision Power-On Reset Power-Control Circuitry Support System Power-On from Date/Day/Time Alarm or Key Closure/Modem-Detect Signal 256 Bytes Battery-Backed SRAM Auxiliary Battery Input Accuracy of DS1511 Better than ±1 Minute/Month at +25°C Day-of-Week/Date Alarm Register Crystal Select Bit Allow RTC to Operate with 6pF or 12.6pF Crystal (DS1501) Battery Voltage-Level Indicator Flags Available as Chip (DS1501) or Stand-Alone Encapsulated DIP Module with Embedded Battery and Crystal (DS1511) Underwriters Laboratories (UL) Recognized ORDERING INFORMATION PART VOLTAGE (V) TEMP RANGE PIN-PACKAGE TOP MARK* DS1501W+ 3.3 0 °C to +70°C 28 DIP (0.600) DS1501W DS1501WE+ 3.3 0 °C to +70°C 28 TSOP DS1501WE DS1501WEN+ 3.3 -40 °C to +85°C 28 TSOP DS1501WEN DS1501WEN+T&R 3.3 -40 °C to +85°C 28 TSOP/Tape & Reel DS1501WEN DS1501WE+T&R 3.3 0 °C to +70°C 28 TSOP/Tape & Reel DS1501WE +Denotes a lead(Pb)-free/RoHS-compliant package. *A “+” anywhere on the top mark denotes a lead(Pb)-free device. An N or IND denotes an industrial temperature device. Ordering Information continued at end of data sheet. 1 of 22 REV: 010909 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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