DS1021S-50

Overview

The DS1021S-50 is a programmable 8-bit silicon delay line manufactured by Analog Devices Inc./Maxim Integrated. It provides a total delay range of 137.5 ns with an incremental step size of 0.5 ns per tap, utilizing 256 distinct steps. The device features an inherent step zero delay of 10 ns and operates on a single 4.75V to 5.25V supply voltage. It supports both 3-wire serial and 8-bit parallel programming interfaces within a 16-pin SOIC package.

Feature Summary

• Supports dual programming modes via 3-wire serial port or 8-bit parallel interface for flexible system integration
• Provides accurate leading and trailing edge timing reproduction without signal inversion
• Features TTL and CMOS logic compatibility with the capability to drive multiple LS-type loads

Applications

• Precision timing adjustment in digital signal processing systems
• Programmable delay generation for test and measurement equipment
• Clock skew compensation in high-speed data acquisition circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices prior to procurement. Ensure storage conditions adhere to specified temperature ranges to maintain reliability.

Selection Notes

Select the DS1021S-50 when a maximum delay of 137.5 ns with 0.5 ns resolution is required. Choose this model over the -25 variant if slower step increments are acceptable. Ensure the design accommodates the 16-pin SOIC footprint and 5V power supply requirements.

Part Context

This component belongs to the DS1020/DS1021 family of all-silicon programmable delay lines. It serves as a low-power CMOS alternative to hybrid delay lines, offering space-saving surface mount packaging. The series includes variants with different step resolutions to suit various timing precision needs.

Replacement Considerations

Public confirmed substitute part numbers: DS1020S-50+.