DS1501WS+

Description：IC RTC CLK/CALENDAR PAR 28SOIC
Series：-

SKU:11fc67c3c28e Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1501WS+ is listed in the Real Time Clock range at ChipApex. The manufacturer field lists Analog Devices Inc./Maxim Integrated. Its product description is IC RTC CLK/CALENDAR PAR 28SOIC. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS1501WS+

Description：IC RTC CLK/CALENDAR PAR 28SOIC
Series：-
Package：Tube
Mfr：Analog Devices Inc./Maxim Integrated
Type：Clock/Calendar
Features：Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K
Memory Size：256B
Time Format：HH:MM:SS (24 hr)
Date Format：YY-MM-DD-dd
Interface：Parallel
Voltage - Supply：3V ~ 3.6V
Voltage - Supply, Battery：2.5V ~ 3.7V
Current - Timekeeping (Max)：4mA @ 3V ~ 3.6V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：28-SOIC (0.295", 7.50mm Width)
Supplier Device Package：28-SOIC

Real Time Clock datasheet and documents for DS1501WS+

DS1501WS+

Real Time Clock Overview

The DS1501WS+ is a Y2K-compliant real-time clock/calendar IC manufactured by Analog Devices Inc./Maxim Integrated. It features a parallel interface, 256 bytes of NV SRAM, and operates at +3.3V with a supply range of 3.0V to 3.6V. The device provides timekeeping in 24-hour BCD format with automatic leap-year compensation up to the year 2100. Key electrical parameters include a maximum standby current of 4mA at 3.3V and a battery voltage range of 2.5V to 3.7V. It is housed in a 28-SOIC package and supports an operating temperature range of 0°C to +70°C.

Real Time Clock Feature Summary

Y2K-Compliant RTC with Century Register and Automatic Leap-Year Compensation
Integrated 256 Bytes Battery-Backed NV SRAM
Programmable Watchdog Timer and Day-of-Week/Date Alarm
Precision Power-On Reset and Power-Control Circuitry

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify component status as discontinued. Confirm availability through authorized distributors or secondary markets. Ensure RoHS3 compliance matches project requirements. Check for specific revision errata before integration.

Real Time Clock Selection Notes

Select based on +3.3V operation requirement and 28-SOIC surface-mount package. Verify compatibility with parallel bus architecture. Ensure external crystal load capacitance (6pF or 12.5pF) matches system design constraints.

Real Time Clock Part Context

Part of the DS1501/DS1511 family of Y2K-compliant watchdog real-time clocks. The 'W' suffix indicates +3.3V operation, while 'S' denotes the SOIC package. The '+' suffix confirms lead-free/RoHS compliance.

Real Time Clock Replacement Considerations

Direct substitutes within the same family include DS1501WE+ and DS1501WEN+. Verify pinout and voltage specifications match when considering alternative RTC components.