Specification	DS1501YN

Current - Timekeeping (Max)	5 mA
Date Format	YY-MM-DD-dd
Features	Y2K, Leap Year, Square Wave Output, Alarm, NVSRAM, Watchdog Timer
Interface	Parallel
Memory Size	256 B
Mounting Type	Through Hole
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	28-DIP
Package / Case	15.24 mm
Package / Case	0.6 in
Supplier Device Package	28-PDIP
Time Format	HH:MM:SS (24 hr)
Type	Clock/Calendar
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	4.5 V
Voltage - Supply, Battery [Max]	3.7 V
Voltage - Supply, Battery [Min]	2.5 V

DS1501 Series

Y2K-Compliant Watchdog Real-Time Clocks

Part	Current - Timekeeping (Max)	Voltage - Supply [Max]	Voltage - Supply [Min]	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Type	Memory Size	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Time Format	Date Format	Features	Interface	Supplier Device Package	Package / Case [custom]	Package / Case	Package / Case [custom]	Package / Case	Package / Case
Analog Devices Inc./Maxim Integrated DS1501YSN+T&R	5 mA	5.5 V	4.5 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	85 °C	-40 C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501WSN	4 mA	3.6 V	3 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	85 °C	-40 C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501YE	5 mA	5.5 V	4.5 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	70 °C	0 °C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-TSOP		28-TSSOP (0.465" 11.80mm Width)
Analog Devices Inc./Maxim Integrated DS1501WSN+T&R	4 mA	3.6 V	3 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	85 °C	-40 C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501WS	4 mA	3.6 V	3 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	70 °C	0 °C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501YZ+	5 mA	5.5 V	4.5 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	70 °C	0 °C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501WS+T&R	4 mA	3.6 V	3 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	70 °C	0 °C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501YSN	5 mA	5.5 V	4.5 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	85 °C	-40 C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-SOIC	0.295 "	28-SOIC	7.5 mm
Analog Devices Inc./Maxim Integrated DS1501WEN+T&R	4 mA	3.6 V	3 V	3.7 V	2.5 V	Clock/Calendar	256 B	Surface Mount	85 °C	-40 C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-TSOP		28-TSSOP (0.465" 11.80mm Width)
Analog Devices Inc./Maxim Integrated DS1501YN	5 mA	5.5 V	4.5 V	3.7 V	2.5 V	Clock/Calendar	256 B	Through Hole	85 °C	-40 C	HH:MM:SS (24 hr)	YY-MM-DD-dd	Alarm Leap Year NVSRAM Square Wave Output Watchdog Timer Y2K	Parallel	28-PDIP		28-DIP		15.24 mm	0.6 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Tube	1001	$ 5.36	<4d

Description

General part information

DS1501 Series

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.ApplicationsBattery-Backed SystemsConsumer ElectronicsOffice EquipmentRemote SystemsTelecom Switches