DS1020S-100

Overview

The DS1020S-100 is a programmable 8-bit silicon delay line manufactured by Analog Devices Inc./Maxim Integrated. It provides 256 equal delay steps with an incremental delay of 1 ns and an inherent step-zero delay of 10 ns. The maximum nominal delay time is 265 ns, with a maximum deviation from the programmed delay of ±20 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 is housed in a 16-pin SOIC package and functions within a temperature range of 0°C to 70°C.

Feature Summary

• Programmable delay control via 3-wire serial port or 8-bit parallel port
• TTL/CMOS-compatible logic levels for broad interface compatibility
• Accurate leading and trailing edge reproduction without inversion
• Supports daisy-chaining multiple units for cascaded programming

Applications

• Precision timing circuits requiring adjustable signal delays
• System synchronization and clock alignment tasks
• Pulse width modulation and shaping applications

Procurement Notes

Verify the specific suffix 'S' confirms the surface-mount SOIC package variant rather than the through-hole DIP version. Confirm RoHS compliance status as datasheets may vary by production batch. Check for obsolescence notices since this component series has been superseded by newer generations. Ensure the -100 speed grade matches the required 1ns step resolution for the design.

Selection Notes

Select the DS1020S-100 when a total delay range up to 265 ns with 1 ns resolution is required. Choose the serial interface mode if pin count minimization is critical, utilizing only three control lines. Opt for the parallel mode if direct hardware switching or frequent manual adjustments are needed. Verify that the 50 µs settling time after delay changes fits within the system's timing budget.

Part Context

This component belongs to the DS1020 family of all-silicon programmable delay lines. It serves as a CMOS alternative to hybrid delay lines, offering economical timing solutions. The family includes variants with different step sizes ranging from 0.15 ns to 2 ns, allowing designers to balance precision against maximum delay range requirements.

Replacement Considerations

DS1020S-50 offers finer 0.5 ns resolution with a lower maximum delay. DS1020S-200 provides a wider 520 ns range with coarser 2 ns steps. DS1020S-15 delivers high precision with 0.15 ns increments but limited total delay.