DS1023S-50

Overview

The DS1023S-50 is an 8-bit programmable timing element manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 5V supply (4.75V to 5.25V) and features a delay step size of 0.5 ns with a maximum delay time of 127.5 ns. The device supports both parallel and serial programming modes, allowing flexible configuration for various timing applications. It is housed in a 16-pin SOIC package and functions within an operating temperature range of 0°C to 70°C.

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
• Pulse width modulation
• Free-running oscillation

Procurement Notes

Verify the specific suffix 'S' indicates the SOIC package variant when sourcing. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated. Ensure the component meets the required operating temperature range of 0°C to 70°C for your application environment.

Selection Notes

Select this model for applications requiring precise 0.5 ns resolution timing adjustments up to 127.5 ns. Consider the serial interface if space is limited, or parallel mode for direct bus connection. Ensure the input signal rise/fall times are within specified limits for accurate delay performance.

Part Context

This component belongs to the DS1023 family of 8-bit programmable timing elements. It shares functional similarities with the DS1020/DS1021 but offers enhanced features like configurable output modes and extended delay capabilities relative to clock periods.

Replacement Considerations

Direct substitutes include other models from the DS1023 series such as DS1023S-25, DS1023S-100, DS1023S-200, and DS1023S-500, which offer different step sizes and maximum delay ranges while maintaining the same package and pinout.

FAQ

What is the function of the REF/PWM pin?

When MS=0, it serves as the Reference Output providing a fixed delay copy of the input. When MS=1, it acts as the Pulse Width Modulated Output triggered by the input waveform.

How does the device handle unused input pins?

Unused parallel input pins (P3-P7) must be connected to well-defined logic levels and not allowed to float. The serial output Q/P0 can be left floating if unused.

Can the DS1023S-50 be used as an oscillator?

Yes, by connecting the inverted OUT pin externally to the IN pin, the device can function as a free-running oscillator with frequency determined by the programmed delay value.