DS1501YSN+T&R

Real Time Clock Overview

The DS1501YSN+T&R is a Y2K-compliant real-time clock/calendar manufactured by Analog Devices Inc./Maxim Integrated. It features a parallel interface, 256 bytes of NV SRAM, and operates on a +5V supply (4.5V to 5.5V). The device provides century, year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format with automatic leap-year compensation valid up to the year 2100. Key specifications include a typical active supply current of 15 mA at 5V, standby currents of 5 mA (TTL) or 5 mA (CMOS), and an operating temperature range of -40°C to +85°C. It is housed in a 28-pin SOIC package.

Real Time Clock Feature Summary

• Y2K-Compliant RTC with Century Register and Automatic Leap-Year Compensation
• 256 Bytes Battery-Backed NV SRAM
• Programmable Watchdog Timer and Day-of-Week/Date Alarm
• +5V Operation with 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 authenticity through authorized distributors. Confirm RoHS compliance status via official documentation. Check for specific manufacturing revisions that may incorporate known errata. Ensure proper handling procedures are followed during storage and assembly to maintain device reliability.

Real Time Clock Selection Notes

Select this part for systems requiring a standalone RTC with integrated memory and watchdog functionality. Ensure the design supports a +5V logic level and utilizes a parallel bus interface. Verify that the application requires the specified -40°C to +85°C industrial temperature range and 28-pin SOIC footprint.

Real Time Clock Part Context

This component belongs to the DS1501 family of Y2K-compliant watchdog real-time clocks. It is functionally similar to the DS1511 but differs in packaging; the DS1501 is a chip-only solution requiring external crystal and battery connections, whereas the DS1511 is a stand-alone encapsulated module.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers: DS1501WE+T&R, DS1501WEN+T&R.