DS1501 Datasheet

Part No.	In Stock	Price	Packaging	SPQ	Marking	MSL	Pins	Temp Range	Package Description
DS1501WZ+	0	$10.26	Tube	25	DS1501WZ	1	28	0°C ~ 70°C	28-SOIC
DS1501WZ+T&R	1000pcs	$8.163	Reel	1000	DS1501WZ	1	28	0°C ~ 70°C	28-SOIC
DS1501WZN+	0	$11.277	Tube	25	DS1501WZN	1	28	-40°C ~ 85°C	28-SOIC
DS1501WZN+T&R	200pcs	$9.936	Reel	1000	DS1501WZN	1	28	-40°C ~ 85°C	28-SOIC
DS1501YN+	0	$10.143	Tube	14	DS1501YN	1	28	-40°C ~ 85°C	28-PDIP
DS1501YZ+	0	$8.856	Tube	25	DS1501YZ	1	28	0°C ~ 70°C	28-SOIC
DS1501YZ+T&R	0	$8.667	Reel	1000	DS1501YZ	1	28	0°C ~ 70°C	28-SOIC
DS1501YZN+	0	$11.439	Tube	25	DS1501YZN	1	28	-40°C ~ 85°C	28-SOIC
DS1501YZN+T&R	0	$10.116	Reel	1000	DS1501YZN	1	28	-40°C ~ 85°C	28-SOIC

• 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
• 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)

• Battery-Backed Systems
• Consumer Electronics
• Office Equipment
• Remote Systems
• Telecom Switches

The DS1501 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 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.