DS1021S-25/T&R

Overview

The DS1021S-25/T&R is a programmable 8-bit silicon delay line manufactured by Analog Devices Inc./Maxim Integrated. It provides a maximum total delay of 73.75 ns with an incremental step size of 0.25 ns and an inherent step zero delay of 10 ns. The device operates on a single 4.75V to 5.25V supply within a commercial temperature range of 0°C to 70°C. It features TTL/CMOS compatibility, driving up to 10 LS-type loads, and supports both 3-wire serial and 8-bit parallel programming interfaces. Packaged in a 16-pin SOIC.

Feature Summary

• Supports dual programming modes via 3-wire serial port or 8-bit parallel interface for flexible system integration.
• Delivers precise timing control with equal 256-step increments and high accuracy on both rising and falling signal edges.
• Features low-power CMOS construction housed in a space-saving, auto-insertable 16-pin surface-mount package.

Applications

• Precision timing circuits requiring adjustable signal delays
• Clock distribution networks needing phase alignment
• Digital logic systems utilizing serial or parallel configuration

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm packaging type and compliance status. Confirm that the component meets all required environmental standards for the intended application environment before finalizing procurement decisions.

Selection Notes

Select this model when a maximum delay of 73.75 ns with 0.25 ns resolution is required. Ensure the design accommodates the 10 ns inherent step zero delay. Verify that the operating voltage remains within the 4.75V to 5.25V range and that the temperature constraints fit the deployment environment.

Part Context

This component belongs to the DS1021 family of programmable silicon delay lines. It serves as a reliable, economical alternative to hybrid programmable delay lines. The series includes variants with different delay steps, such as the -50 model offering 0.5 ns steps.

Replacement Considerations

The DS1021S-50+T is a compatible variant within the same family offering 0.5 ns step increments instead of 0.25 ns. Verify pinout compatibility and electrical characteristics before substitution.