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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Delay Lines

Analog Devices Inc./Maxim Integrated DS1023S-50/T&R

Name: DS1023S-50/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1023S-50/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1023S-50/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Delay Lines

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: DS1023S-50/T&R.pdf

Description:: IC DEL LN 256TAP 127.5NS 16SOIC

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Product details

Overview

DS1023S-50/T&R from Maxim Integrated (formerly Dallas Semiconductor) is an 8-bit programmable silicon delay line configured for 0.5 ns step resolution, 127.5 ns maximum delay in normal mode, and ±2 ns integral non-linearity. It operates from a single 5V supply, supports parallel/serial programming, and delivers precise clock phase control or pulse width modulation in test instrumentation and digital timing systems.

For engineers reviewing the DS1023S-50/T&R datasheet, DS1023S-50/T&R pinout, DS1023S-50/T&R application, or DS1023S-50/T&R equivalent, this device enables full 0–360° clock phase adjustment via on-chip reference delay compensation, supports daisy-chained serial programming, and provides dual output modes (delayed/inverted OUT and REF/PWM) controlled by MS and P/S pins.

Technical Context

The DS1023S-50/T&R implements a revised internal delay line architecture allowing input clock delays up to one full period or more, with guaranteed monotonicity across its 256-step range. Its on-chip reference delay (18–22 ns) offsets inherent step-zero delay (−2 to 22 ns), enabling true zero-relative delay measurement referenced to REF.

It supports three configurable operating modes: delay line (MS = 0), pulse width modulator (MS = 1, PWM on REF), and free-running oscillator (MS = 1 with external IN–OUT feedback). Programming is performed either in parallel (P0–P7 + LE) or serially (D/P2, CLK/P1, Q/P0), sharing pins between modes as defined by P/S polarity.

Key Specifications

Parameter	Value and Actual Design Meaning
Delay Step Size	0.5 ns - smallest programmable increment; enables fine-grained phase alignment in high-speed clock domains.
Max Delay (wrt REF)	127.5 ns - absolute maximum delay achievable in normal mode; sufficient for sub-8 MHz clock period alignment.
Step Zero Delay	−2 to 22 ns - inherent propagation delay at zero programming; compensated by on-chip REF output.
Reference Delay	18–22 ns - trimmed fixed delay used as timing baseline; cancels process/temperature drift of step-zero delay.
Integral Non-linearity	±2 ns - max deviation from ideal linear delay vs. code; ensures predictable timing error across full range.
Min Input Pulse Width	20 ns - shortest valid input pulse; supports operation up to 25 MHz clock frequency in delay mode.
Supply Voltage	4.75–5.25 V - single-rail CMOS-compatible supply; eliminates need for level-shifting in 5V logic systems.

Pinout & Package

DS1023S-50/T&R is supplied in a 16-pin 300-mil SOIC package (JEDEC MS-012AC), surface-mount compatible with standard reflow profiles and board space constraints typical in test equipment and embedded timing modules.

Pin/Terminal	Circuit Role	Design Meaning
IN	Signal Input	Primary timing signal source; all delay functions referenced to rising edge.
OUT / OUT	Programmable Output	Delayed (MS=0) or inverted delayed (MS=1) replica of IN; used for phase-shifted clocks or oscillator feedback.
REF / PWM	Reference or Modulated Output	Fixed 18–22 ns reference (MS=0) or rising-edge-triggered PWM output (MS=1); enables zero-baseline measurement or duty-cycle control.
P0–P7	Parallel Data Inputs	8-bit delay value bus; P0–P2 double as serial I/O in serial mode; unused P3–P7 must be tied to VCC/GND.
LE	Latch Enable	Active-high control for parallel data capture; latches P0–P7 when transitioned low; must be high during serial access.
P/S	Programming Mode Select	Low = parallel mode; high = serial mode; polarity reversed vs. DS1020/DS1021.
MS	Output Mode Select	Low = delay line mode (OUT = delayed, REF = reference); high = PWM/oscillator mode (REF = PWM, OUT = inverted).
VCC, GND	Power Supply	Single 5V supply with decoupling recommended; CMOS inputs require defined logic levels on all unused pins.

Key Features

Feature	Design Value
On-chip reference delay	18–22 ns trimmed delay used as stable baseline to cancel step-zero variation and enable true zero-relative delay calibration.
Configurable output modes	Three distinct system roles: precision delay line (MS=0), pulse width modulator (MS=1, PWM on REF), or free-running oscillator (MS=1 with IN–OUT loop).
Dual programming interfaces	Parallel (8-bit bus + LE) for fast static configuration; serial (MSB-first, daisy-chainable) for compact microcontroller control or multi-device synchronization.
Guaranteed monotonic delay	No delay reduction with increasing code value; ensures deterministic timing behavior critical for closed-loop phase alignment and jitter-sensitive applications.
Full-period+ clock delay	Supports delaying clocks beyond one full period (e.g., 127.5 ns at 25 MHz = ~3.2× period), enabling advanced skew compensation and time-interleaved sampling.

Applications

Automatic Test Equipment (ATE)	Digital Phase Alignment
Use Scenario: Precise stimulus-response timing in boundary-scan or functional test systems where signal launch and capture must be synchronized within sub-nanosecond windows. IC Role / Device Role / Timing Role: Programmable delay element generating calibrated timing offsets between pattern generator outputs and digitizer sampling clocks. Use Value: Enables deterministic setup/hold margin verification at 25 MHz clock rates using 0.5 ns step resolution and ±2 ns linearity-critical for high-yield production testing.	Use Scenario: Aligning clock edges across multiple FPGA banks or ASIC clock domains to minimize inter-chip skew in high-speed serial link receivers. IC Role / Device Role / Timing Role: Clock phase shifter compensating for PCB trace length mismatches and package-induced delays in multi-lane SerDes subsystems. Use Value: Delivers full 0–360° phase coverage using on-chip REF compensation, eliminating need for external delay-matching components or iterative layout revisions.
Pulse Width Modulation Control	Free-Running Oscillator Generation
Use Scenario: Generating variable-duty-cycle timing pulses for analog front-end calibration, LED dimming, or power converter gate drive in embedded instrumentation. IC Role / Device Role / Timing Role: Hardware-based PWM generator triggered by system clock edge, with pulse width set by 8-bit register and minimum 5 ns width guarantee. Use Value: Provides jitter-free, temperature-stable pulse widths without MCU intervention-reducing firmware overhead and improving repeatability in lab-grade equipment.	Use Scenario: Creating stable, user-adjustable clock sources for prototype validation, where crystal oscillators are unavailable or too inflexible. IC Role / Device Role / Timing Role: Inverting delay element configured as ring oscillator; output frequency determined solely by programmed delay value (e.g., 3.6–22 MHz for DS1023S-50). Use Value: Enables rapid frequency tuning via digital interface-no external components required-while maintaining monotonic frequency vs. code behavior for predictable sweep testing.

Automatic Test Equipment (ATE)

Digital Phase Alignment

Use Scenario: Precise stimulus-response timing in boundary-scan or functional test systems where signal launch and capture must be synchronized within sub-nanosecond windows.

IC Role / Device Role / Timing Role: Programmable delay element generating calibrated timing offsets between pattern generator outputs and digitizer sampling clocks.

Use Value: Enables deterministic setup/hold margin verification at 25 MHz clock rates using 0.5 ns step resolution and ±2 ns linearity-critical for high-yield production testing.

Use Scenario: Aligning clock edges across multiple FPGA banks or ASIC clock domains to minimize inter-chip skew in high-speed serial link receivers.

IC Role / Device Role / Timing Role: Clock phase shifter compensating for PCB trace length mismatches and package-induced delays in multi-lane SerDes subsystems.

Use Value: Delivers full 0–360° phase coverage using on-chip REF compensation, eliminating need for external delay-matching components or iterative layout revisions.

Pulse Width Modulation Control

Free-Running Oscillator Generation

Use Scenario: Generating variable-duty-cycle timing pulses for analog front-end calibration, LED dimming, or power converter gate drive in embedded instrumentation.

IC Role / Device Role / Timing Role: Hardware-based PWM generator triggered by system clock edge, with pulse width set by 8-bit register and minimum 5 ns width guarantee.

Use Value: Provides jitter-free, temperature-stable pulse widths without MCU intervention-reducing firmware overhead and improving repeatability in lab-grade equipment.

Use Scenario: Creating stable, user-adjustable clock sources for prototype validation, where crystal oscillators are unavailable or too inflexible.

IC Role / Device Role / Timing Role: Inverting delay element configured as ring oscillator; output frequency determined solely by programmed delay value (e.g., 3.6–22 MHz for DS1023S-50).

Use Value: Enables rapid frequency tuning via digital interface-no external components required-while maintaining monotonic frequency vs. code behavior for predictable sweep testing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS1023-50	Same die, 16-pin DIP package; identical electrical specs and timing performance.	Through-hole mounting only; unsuitable for high-density SMT layouts or automated assembly.	Select DS1023-50 only for prototyping, legacy repair, or hand-soldered evaluation where SOIC footprint is unavailable.
MAX9622	Single 5 ns step, 255-step range, 1.25 µs max delay; 3.3 V supply; no REF output or PWM mode.	Designed for lower-frequency, low-voltage systems; lacks reference-compensated zero-delay capability and dual-mode flexibility.	Choose MAX9622 only when 3.3 V operation, longer delay range, or simplified interface outweighs need for 0.5 ns resolution and REF-based calibration.

Compared with DS1023-50 (DIP) and MAX9622 (3.3 V, coarser step), DS1023S-50/T&R uniquely combines 0.5 ns resolution, 5 V compatibility, on-chip REF compensation, and triple-mode operation in a production-ready SOIC tape-and-reel format-making it optimal for ATE timing modules and phase-critical digital systems requiring SMT scalability.

Availability

DS1023S-50/T&R is available at Aetrix Electronics and suitable for automatic test equipment, digital phase alignment, pulse width modulation control, and free-running oscillator generation requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for DS1023S-50/T&R 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 equipment markets.

The DS1023 product line was designed specifically for programmable timing applications demanding sub-nanosecond resolution, monotonic delay behavior, and flexible configuration-targeting ATE, digital oscilloscopes, and high-speed data acquisition systems.

FAQ

What is the maximum clock frequency supported by DS1023S-50/T&R in delay line mode?

The DS1023S-50/T&R supports a maximum input clock frequency of 25 MHz in normal delay mode, based on its minimum input pulse width specification of 20 ns. This limit ensures accurate delay registration and avoids metastability or timing violation in the internal latch structure. Operation above 25 MHz may result in unpredictable delay values or failure to capture input transitions reliably. The DS1023S-50/T&R datasheet confirms this rating under standard test conditions (TA = 0°C to 70°C, VCC = 5V ±5%).

Does DS1023S-50/T&R support daisy-chained serial programming?

Yes, DS1023S-50/T&R supports daisy-chained serial programming: the Q/P0 pin outputs the MSB-to-LSB bitstream of the current register while new data is shifted in via D/P2, enabling cascaded configuration of multiple devices using a single serial bus. Each DS1023S-50/T&R contributes eight bits per cycle, and the total bit count equals 8 × number of devices. This feature is explicitly documented in the "CASCADING MULTIPLE DEVICES (DAISY CHAIN)" section of the DS1023S-50/T&R datasheet.

How does the REF output improve timing accuracy in DS1023S-50/T&R?

The REF output in DS1023S-50/T&R provides a fixed 18–22 ns delay that cancels step-zero variation and process/temperature drift, enabling true zero-relative delay measurement. When delay is measured between REF and OUT instead of IN and OUT, offset errors are eliminated-resulting in higher absolute accuracy and stability. The DS1023S-50/T&R datasheet states that using REF "totally removes" effects of input voltage/transition time variation and "cancels out" adverse temperature coefficients affecting step-zero delay.

Can DS1023S-50/T&R generate a free-running oscillator without external components?

Yes, DS1023S-50/T&R can generate a free-running oscillator by externally connecting the OUT pin back to the IN pin while configuring MS = 1. In this mode, the device operates as an inverting delay element forming a ring oscillator, with output frequency determined solely by the programmed delay value (e.g., 3.6–22 MHz for DS1023S-50/T&R). No external resistors or capacitors are required-the DS1023S-50/T&R datasheet confirms this functionality in the "Oscillator Configuration" table and Figure 4.

What is the minimum usable PWM pulse width from DS1023S-50/T&R's REF output?

The minimum reliable PWM pulse width from DS1023S-50/T&R's REF output is 5 ns, as specified in the "Minimum PWM Output Pulse Width" parameter. Pulse widths below 5 ns may cause degraded high-level voltage or complete loss of output due to internal response limitations. This value is confirmed across all DS1023 speed grades in the AC Electrical Characteristics tables and is independent of input frequency or supply voltage within rated conditions.

DS1023S-50/T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Number of Taps/Steps:: 256

Function:: 1-Shot, Programmable

Delay to 1st Tap:: 16.5ns

Tap Increment:: 500 ps

Available Total Delays:: 127.5ns

Number of Independent Delays:: 1

Voltage - Supply:: 4.75V ~ 5.25V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

DS1023S-50/T&R FAQ

1.How can I place an order for DS1023S-50/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1023S-50/T&R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DS1023S-50/T&R reliable?

The price and inventory of DS1023S-50/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1023S-50/T&R is usually 5 days.

3.What payment methods are accepted for DS1023S-50/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1023S-50/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1023S-50/T&R?

DS1023S-50/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1023S-50/T&R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DS1023S-50/T&R?

For technical support, including DS1023S-50/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1023S-50/T&R requirements.

6.How does Aetrix verify that DS1023S-50/T&R is sourced from the original manufacturer or authorized distributors?

All DS1023S-50/T&R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1023S-50/T&R meets industry standards.

7.What is the process for return or replacement of DS1023S-50/T&R?

All DS1023S-50/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1023S-50/T&R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DS1023S-50/T&R part is unused and in its original packaging.

Return procedure for DS1023S-50/T&R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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