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 delay of 73.75 ns with an incremental step of 0.25 ns and an inherent step zero delay of 10 ns. The device operates on a single +5 V supply (4.75 V to 5.25 V) within an industrial temperature range of 0°C to 70°C. It features TTL/CMOS compatibility, low-power CMOS design, and supports both 3-wire serial and 8-bit parallel programming interfaces. The component is housed in a 16-pin SOIC package.

Feature Summary

• Supports dual programming modes via 3-wire serial port or 8-bit parallel port for flexible timing configuration.
• Provides precise leading and trailing edge accuracy for reliable signal reproduction without inversion.
• Features low-power CMOS architecture compatible with standard TTL and CMOS logic families.

Applications

• Precision timing control in digital systems requiring adjustable signal delays.
• Pulse width modulation and timing element generation in electronic circuits.
• Cascaded multi-device configurations for complex sequential logic applications.

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm packaging type and compliance status. Ensure that the ordering information matches the required surface-mount package and operational temperature range. Cross-reference part numbers with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select the DS1021S-25 variant when a maximum delay of 73.75 ns with 0.25 ns resolution is required. Choose the -50 model if a longer delay range up to 137.5 ns with 0.5 ns steps is necessary. Consider the programming interface requirements, as both serial and parallel modes are supported but require distinct control logic implementation.

Part Context

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

Replacement Considerations

Public confirmed substitute part numbers: DS1021S-50+T&R