DS1021S-50+

Overview

The DS1021S-50+ is a programmable 8-bit silicon delay line manufactured by Analog Devices Inc./Maxim Integrated. It provides a maximum delay of 137.5 ns with an incremental step of 0.5 ns, starting from a base delay of 10 ns. The device operates on a single 5V supply (4.75V to 5.25V) and supports both 3-wire serial and 8-bit parallel programming interfaces. It features TTL/CMOS compatibility and is housed in a 16-pin SOIC package.

Feature Summary

• Supports dual programming modes via 3-wire serial port or 8-bit parallel interface for flexible timing control.
• Provides accurate leading and trailing edge reproduction without signal inversion.
• Features low-power CMOS construction with TTL and CMOS logic compatibility.

Applications

• Precision timing circuits requiring adjustable delays
• Pulse width modulation systems
• Digital signal processing synchronization

Procurement Notes

Verify the specific suffix designation against official documentation to confirm the 0.5 ns step size variant. Confirm RoHS compliance status as historical data may vary. Check current availability as this component series has been subject to discontinuation notices. Ensure the ordering code matches the required package type and temperature range specifications.

Selection Notes

Select the DS1021S-50+ when a maximum delay of 137.5 ns is required. Choose this model over the -25 variant if a 0.5 ns resolution is sufficient for the application. Verify that the system can accommodate the 50 µs settling time after delay changes. Ensure the design accounts for the 10 ns inherent step zero delay offset.

Part Context

This component belongs to the DS1021 family of programmable silicon delay lines. It serves as a solid-state alternative to hybrid delay lines, offering space-saving surface mount packaging. The series includes variants with different delay resolutions to suit various timing precision requirements.

Replacement Considerations

DS1021S-25+