DS1023S-25+

Overview

The DS1023S-25+T is an 8-bit programmable delay line IC manufactured by Analog Devices Inc./Maxim Integrated. It features a single delay path with 256 taps and a step size of 250 ps, providing a total available delay of 63.75 ns. The device operates on a single 4.75V to 5.25V supply within a commercial temperature range of 0°C to 70°C. It supports both parallel and serial programming modes for configuration. The component is housed in a 16-SOIC surface-mount package.

Feature Summary

• Configurable as a delay line, pulse width modulator, or free-running oscillator
• Includes an on-chip reference delay to compensate for inherent step zero delay
• Supports both parallel and serial programming interfaces
• Capable of delaying clocks by a full period or more

Applications

• Clock phase control applications requiring variable delay
• Pulse width modulation signal generation
• Free-running oscillator circuits
• Timing element configurations in digital systems

Procurement Notes

Verify the specific suffix '+T' indicates tape and reel packaging when sourcing components. Confirm that the manufacturer designation matches Analog Devices Inc. or Maxim Integrated to ensure authenticity. Check RoHS compliance status against current regulatory requirements before finalizing procurement orders.

Selection Notes

Select this model when a maximum delay of approximately 64 ns is required. Ensure the application supports the 250 ps step resolution. Verify that the 16-SOIC package footprint fits the design constraints. Confirm that the operating voltage range aligns with the system power supply.

Part Context

This component belongs to the DS1023 family of 8-bit programmable timing elements. It shares functional similarities with the DS1020 and DS1021 but includes architectural revisions for extended delay capabilities. The 'S' suffix denotes the SOIC package variant, while the '-25' indicates the specific delay range option.

Replacement Considerations

DS1023S-50+T

FAQ

How does the on-chip reference delay improve accuracy?

The reference delay compensates for the inherent step zero delay caused by input and output buffer propagation. Using it cancels out adverse effects from process temperature coefficients and input voltage variations.

What is the minimum input pulse width for reliable operation?

The minimum input pulse width is specified as 20 ns for the DS1023-25 variant. Violating this may impair timing accuracy or result in no output.

Can unused input pins be left floating?

No. Unused parallel input pins (P3 through P7) must be connected to well-defined logic levels. Floating inputs are not permitted due to the CMOS design.