DS1020S-50+

Overview

The DS1020S-50+ is a programmable 8-bit silicon delay line manufactured by Analog Devices Inc./Maxim Integrated. It provides a total available delay of 137.5 ns with an incremental step size of 500 ps. The device features 256 taps and includes an inherent step-zero delay of 10 ns. It operates on a single 4.75V to 5.25V supply voltage within a commercial temperature range of 0°C to 70°C. The component is housed in a 16-SOIC surface-mount package.

Feature Summary

• Supports dual programming interfaces via a 3-wire serial port or an 8-bit parallel port for flexible configuration.
• Delivers precise timing control with accuracy maintained on both rising and falling signal edges.
• Compatible with standard TTL and CMOS logic families, allowing direct interfacing with common digital systems.

Applications

• Precision timing circuits requiring adjustable signal delays
• Pulse width modulation generation
• Digital clock synchronization

Procurement Notes

Verify the specific suffix 'S-50+' against official datasheets to confirm the SOIC package and 500ps step size. Confirm RoHS compliance status as indicated in current manufacturer documentation. Check for obsolescence notices from Analog Devices or Maxim Integrated before finalizing procurement plans.

Selection Notes

Select this model when a maximum delay of 137.5 ns is required. Ensure the design accommodates the 10 ns inherent step-zero delay. Verify that the 16-pin SOIC footprint fits the PCB layout constraints. Consider the 50 µs settling time if frequent delay value changes are necessary.

Part Context

This component belongs to the DS1020 family of programmable silicon delay lines. The 'S' designation indicates the surface-mount SOIC package variant, while the '-50' suffix specifies the 500 ps step increment. Other variants in the series offer different step sizes ranging from 0.15 ns to 2 ns.

Replacement Considerations

Direct replacements include other models within the DS1020 family such as DS1020S-25+ or DS1020S-100+, provided the delay resolution requirements align with their respective step sizes. Verify pin compatibility and electrical characteristics before substitution.

FAQ

How is the delay value programmed?

The delay value is programmed using either an 8-bit parallel input (P0-P7) or a 3-wire serial interface consisting of Data, Clock, and Mode Select pins.

What is the inherent delay of the device?

All models in the DS1020 series have an inherent step-zero delay of 10 ns, which is added to the user-programmed delay value.

Can multiple devices be daisy-chained?

Yes, multiple DS1020 devices can be cascaded by connecting the serial output (Q) of one device to the serial data input (D) of the next.