DS1501YZ+

Real Time Clock Overview

The DS1501YZ+ 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 +5V with a temperature range of -40°C to +85°C. The device provides century, year, month, date, day, hours, minutes, and seconds data in BCD format with automatic leap-year compensation valid up to the year 2100. Key functions include a programmable watchdog timer, RTC alarm, power-on reset, battery monitors, and a 32.768kHz output.

Real Time Clock Feature Summary

• Y2K-Compliant RTC with Automatic Leap-Year Compensation
• 256 Bytes Battery-Backed NV SRAM
• Programmable Watchdog Timer and RTC Alarm
• +5V Operation with -40°C to +85°C Temperature Range

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 or official manufacturer channels. Confirm RoHS compliance status and lead-free packaging designation (+ suffix). Check for specific manufacturing revisions or known errata applicable to this part number before integration into production designs.

Real Time Clock Selection Notes

Select the DS1501YZ+ for applications requiring +5V logic levels and industrial temperature ranges (-40°C to +85°C). Ensure system design accommodates the parallel interface requirements and external 32.768kHz crystal selection (6pF or 12.5pF load capacitance). Verify auxiliary battery connections if kickstart or square-wave features are utilized during power loss.

Real Time Clock Part Context

This component belongs to the DS1501/DS1511 family of Y2K-compliant watchdog real-time clocks. The 'Y' suffix indicates +5V operation, while 'Z' denotes the SOIC-28 package variant. The '+' suffix signifies lead-free/RoHS-compliant packaging. It serves as a standalone RTC solution distinct from the embedded module version (DS1511).

Real Time Clock Replacement Considerations

Direct pin-compatible replacements within the same voltage and package constraints should be evaluated based on updated feature sets or availability. Consult the manufacturer's current product portfolio for newer generations of RTCs that may offer improved accuracy or lower power consumption.