DS1501WEN Datasheet PDF - Dallas Semiconductor

●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.

●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 or +5V 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 NV 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

●Battery Voltage-Level Indicator Flags

●Available as Chip (DS1501) or Stand-Alone Module with Embedded Battery and Crystal(DS1511)

●UL Recognized

●APPLICATIONS

●Remote Systems

●Battery-Backed Systems

●Telecom Switches

●Office Equipment

●Consumer Electronics