Analog Devices Inc./Maxim Integrated DS1023S-50+T

Overview

DS1023S-50+T from Maxim Integrated (formerly Dallas Semiconductor) is an 8-bit programmable silicon delay line IC configured for precise timing control in clock phase adjustment, pulse width modulation, and free-running oscillator applications. It delivers a 0.5 ns step size, up to 127.5 ns maximum delay (relative to REF), ±2 ns integral non-linearity, and operates from a single 5V supply. Used in high-speed digital test equipment for jitter compensation and clock deskew.

For engineers reviewing the DS1023S-50+T datasheet, DS1023S-50+T pinout, DS1023S-50+T application, or DS1023S-50+T equivalent, this page provides verified functional identity, validated package mapping (SOIC-16), confirmed pin roles, real-world timing use cases, and two technically documented alternative parts with explicit differences in step size and max delay.

Technical Context

The DS1023S-50+T implements a digitally programmable analog delay line architecture with on-chip reference delay trimming to enable full 0–360° clock phase variation. Its dual-mode output (normal delayed OUT or PWM/oscillator via MS pin) is controlled by eight parallel inputs (P0–P7) or serial interface (CLK/P1, D/P2, Q/P0).

It supports both parallel latching (LE-controlled) and daisy-chain serial programming, with guaranteed monotonic delay response and internal CMOS gating for pulse width modulation. The device uses a fixed reference delay (~20 ns) to offset step-zero delay, enabling true zero-relative delay calibration.

Key Specifications

Pinout & Package

DS1023S-50+T is housed in a 16-pin 300-mil SOIC package (JEDEC MS-012AC), surface-mount compatible with standard reflow profiles and PCB assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable delay line applications.

Compared with DS1023S-50+T, DS1023S-25+T offers higher resolution but half the delay range, while DS1023S-100+T doubles the max delay at the cost of resolution and linearity-making DS1023S-50+T the balanced choice for general-purpose 25 MHz clock domain timing.

Availability

DS1023S-50+T is available at Aetrix Electronics and suitable for automated test equipment, digital instrumentation, precision timing modules, and embedded clock management systems requiring stable component supply across multi-year production cycles.

Supply support for DS1023S-50+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (acquired by Analog Devices in 2021) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability timing solutions for industrial, communications, and test & measurement markets.

The DS1023 product line was designed specifically for programmable timing control in digital test systems, offering calibrated delay lines with reference compensation to replace discrete RC networks and improve repeatability in lab and production environments.

FAQ

What is the actual delay range of DS1023S-50+T relative to its REF output?

The DS1023S-50+T provides a maximum delay of 127.5 ns relative to the REF output, with a step size of 0.5 ns. This range is measured from the rising edge of the input to the rising edge of the OUT signal, referenced to the fixed ~20 ns REF delay. The minimum relative delay is effectively zero due to on-chip trimming that ensures REF is slightly longer than step-zero delay.

Can DS1023S-50+T generate a free-running oscillator, and how is it configured?

Yes, DS1023S-50+T can operate as a free-running oscillator by externally connecting the OUT pin to the IN pin while setting MS = 1. In this configuration, the output period equals twice the programmed absolute delay (2 × t_D). For DS1023S-50+T, this yields an output frequency range of 3.6 MHz to 22 MHz, depending on the programmed value and step-zero delay.

How does the REF output improve timing accuracy in DS1023S-50+T applications?

The REF output in DS1023S-50+T provides a fixed ~20 ns delay that cancels process- and temperature-induced variations in step-zero delay. By measuring delay relative to REF instead of absolute IN-to-OUT time, users eliminate offset drift and achieve consistent zero-delay calibration-critical for phase-sensitive applications like clock deskew and jitter analysis.

What are the power supply requirements for stable operation of DS1023S-50+T?

DS1023S-50+T requires a single 5V supply with tight regulation: 4.75 V to 5.25 V over 0°C to +70°C. A local 0.1 µF ceramic decoupling capacitor must be placed between VCC and GND near the device. Supply current is 30–60 mA typical; excessive noise or ripple on VCC degrades delay accuracy and increases jitter.

Is DS1023S-50+T pin-compatible with earlier DS1020/DS1021 devices?

No, DS1023S-50+T is not pin-compatible with DS1020 or DS1021. While programming logic is similar, DS1023S-50+T repurposes P0–P2 pins for dual-mode serial I/O (Q/CLK/D), adds MS and P/S pins, and reassigns REF/PWM functionality. Board layout and firmware must be updated to accommodate the revised pinout and mode control scheme.