DS1021S-25+

Overview

The DS1021S-25+ is a programmable 8-bit silicon delay line manufactured by Analog Devices Inc./Maxim Integrated. It provides a total delay range of 73.75 ns with an incremental step size of 0.25 ns and a base delay of 10 ns at step zero. 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, low-power CMOS construction, and is housed in a 16-pin SOIC package.

Feature Summary

• Supports dual programming interfaces via an 8-bit parallel port or a 3-wire serial port for flexible system integration.
• Delivers precise timing control with accuracy maintained on both rising and falling signal edges.
• Enables cascading multiple units through a daisy-chain serial architecture for expanded delay capabilities.

Applications

• Precision timing adjustments in digital logic circuits
• Programmable delay generation for clock synchronization systems
• Signal path timing compensation in high-speed data acquisition

Procurement Notes

Verify the component status as discontinued before initiating procurement. Confirm that the + suffix indicates RoHS compliance relative to original specifications. Ensure the 16-SOIC package dimensions match the target PCB footprint. Validate that the 5V supply requirement aligns with the existing power distribution network.

Selection Notes

Select this model when a maximum delay of 73.75 ns is required. Choose the -25 variant over the -50 version for finer 0.25 ns resolution. Ensure the design accommodates the 50 µs settling time following any delay value change. Verify that the serial or parallel interface constraints fit the controller's available I/O resources.

Part Context

This component belongs to the DS1021 family of all-silicon programmable delay lines. It serves as a CMOS alternative to hybrid delay lines, offering space-saving surface mount packaging. The series includes variants with different step sizes to accommodate varying precision requirements in timing applications.

Replacement Considerations

DS1023S-25+T offers similar functionality with updated packaging options and RoHS3 compliance.