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

Analog Devices Inc./Maxim Integrated DS1020S-50/T&R

Name: DS1020S-50/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1020S-50/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1020S-50/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Delay Lines

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

Datasheet:: DS1020S-50/T&R.pdf

Description:: IC DEL LN 256TAP 137.5NS 16SOIC

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Product details

Overview

DS1020S-50/T&R from Dallas Semiconductor (now Maxim Integrated) is a programmable 8-bit silicon delay line in 16-pin SOIC package, delivering 10 ns inherent delay plus 0.5 ns per step over 256 steps (max 137.5 ns), with ±8 ns max deviation, TTL/CMOS-compatible output driving 10 LS loads, used for precision edge-aligned timing adjustment in high-speed digital test and synchronization circuits.

For engineers reviewing the DS1020S-50/T&R datasheet, DS1020S-50/T&R pinout, DS1020S-50/T&R application, or DS1020S-50/T&R equivalent, key selection criteria include programmable delay resolution (0.5 ns), dual programming interface (serial/parallel), rising/falling edge accuracy, 5 V supply operation, and SOIC-16 surface-mount compatibility for automated assembly.

Technical Context

The DS1020S-50/T&R implements an all-CMOS 8-bit programmable delay core with two distinct configuration modes: parallel mode (S = 1) using P0–P7 pins for direct binary delay setting, and serial mode (S = 0) using C/D/Q pins for daisy-chainable 8-bit MSB-first loading. Both modes require E = 1 during programming and enforce tEDV = 50 µs settling time before valid delay output.

It features non-inverting signal replication with identical tPLH and tPHL delay values, 1.5 V threshold measurement reference, and guaranteed operation across 0°C to 70°C at VCC = 5.0 V ±5%. Unused CMOS inputs (e.g., D, C in parallel mode; P0–P7 in serial mode) must be tied to defined logic levels to prevent floating.

Key Specifications

Parameter	Value and Actual Design Meaning
Inherent Delay	10 ±2 ns - fixed base delay independent of programming; sets minimum system timing offset
Delay Step Size	0.5 ns - smallest adjustable increment; enables fine-grained jitter control in clock/data alignment
Max Programmable Delay	137.5 ns - full-scale delay at P0–P7 = 11111111; supports multi-cycle phase tuning
Delay Accuracy	±8 ns - worst-case deviation from nominal programmed value; critical for setup/hold margining
Supply Voltage	4.75–5.25 V - tight 5 V tolerance; ensures stable delay performance under rail variation
Input Compatibility	TTL/CMOS - VIH ≥2.2 V, VIL ≤0.8 V; interoperates with legacy 74LS and modern 5 V logic families
Output Drive	8 mA sink / 1 mA source - sufficient for 10 × 74LS loads; avoids need for external buffering

Pinout & Package

DS1020S-50/T&R is housed in a 16-pin SOIC (300-mil) surface-mount package, RoHS-compliant, vapor-phase and IR solderable, with 1.27 mm pitch and 10.3 mm × 7.5 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
IN	Delay Input	Asynchronous signal input; delay measured from 1.5 V crossing on rising/falling edge
OUT	Delay Output	Non-inverted replica of IN after programmed delay; referenced to same 1.5 V threshold
P0–P7	Parallel Program Inputs	8-bit binary code (P0 = LSB) setting delay in parallel mode; must be static or latched via E
S	Mode Select	High = parallel mode; Low = serial mode; determines active programming interface
E	Enable	Active-high control: enables programming latch (parallel) or serial register load/read (serial)
C	Serial Clock	Rising-edge-triggered clock for serial bit shifting; MSB first, tDSC = 30 ns setup required
D	Serial Data Input	MSB-first serial data input; must be stable tDSC before C rising edge
Q/P0	Serial Data Output / Parallel Bit 0	Shifts out prior register contents during serial load; functions as P0 in parallel mode
VCC	Power Supply	+5 V supply; decoupling recommended near pin; ICC ≤30 mA under full-period switching
GND	Ground Reference	Signal and power ground return; low-impedance connection essential for delay stability

Key Features

Feature	Design Value
All-silicon construction	Eliminates hybrid delay line reliability risks (e.g., wire bond fatigue, thermal drift); enables automotive-grade long-term stability
Dual programming interface	Supports both infrequent jumper-based delay setting (parallel) and dynamic real-time reconfiguration (serial daisy-chain)
Rising/falling edge accuracy	Identical tPLH and tPHL delay values ensure symmetrical timing for clock/data eye centering in bidirectional interfaces
Low-power CMOS design	ICC ≤30 mA at 1 MHz period; reduces thermal load in dense PCB layouts and eliminates heat-induced delay drift
SOIC-16 auto-insertable footprint	Compatible with standard SMT pick-and-place and reflow processes; no lead forming or through-hole tooling required

Applications

Test Equipment Timing Calibration	Digital Logic Skew Compensation
Use Scenario: Adjusting precise timing offsets between stimulus and response channels in automated test equipment (ATE) for ASIC validation. IC Role / Device Role / Timing Role: Programmable delay element inserted in signal path to align input capture windows with device-under-test output transitions. Use Value: Enables sub-nanosecond calibration without hardware changes; 0.5 ns step size meets IEEE 1149.1 boundary-scan timing requirements.	Use Scenario: Compensating trace-length-induced skew between parallel data lines in high-speed memory interfaces (e.g., SRAM, FIFO buffers). IC Role / Device Role / Timing Role: Non-inverting delay buffer placed on shorter traces to match propagation delay of longer routes. Use Value: Restores simultaneous arrival of data bits at receiver, reducing setup/hold violations and enabling >100 MHz bus operation.
Programmable Clock Phase Shifter	Serial Interface Timing Alignment
Use Scenario: Generating multiple phase-shifted clock copies from a single master oscillator in FPGA-based digital signal processing systems. IC Role / Device Role / Timing Role: Delay line configured in serial daisy-chain to produce discrete phase steps (e.g., 0°, 45°, 90°) for pipeline stage synchronization. Use Value: Achieves deterministic phase relationships without PLL complexity; 137.5 ns max delay supports 7.25 MHz clock (137.5 ns = 1/7.27 MHz).	Use Scenario: Aligning data and strobe edges in custom serial protocols where transmitter/receiver timing margins are marginal. IC Role / Device Role / Timing Role: Inserted between serializer output and line driver to shift data relative to clock or enable signals. Use Value: Resolves timing violations caused by PCB routing asymmetry; ±8 ns accuracy ensures robust sampling across temperature and voltage.

Test Equipment Timing Calibration

Digital Logic Skew Compensation

Use Scenario: Adjusting precise timing offsets between stimulus and response channels in automated test equipment (ATE) for ASIC validation.

IC Role / Device Role / Timing Role: Programmable delay element inserted in signal path to align input capture windows with device-under-test output transitions.

Use Value: Enables sub-nanosecond calibration without hardware changes; 0.5 ns step size meets IEEE 1149.1 boundary-scan timing requirements.

Use Scenario: Compensating trace-length-induced skew between parallel data lines in high-speed memory interfaces (e.g., SRAM, FIFO buffers).

IC Role / Device Role / Timing Role: Non-inverting delay buffer placed on shorter traces to match propagation delay of longer routes.

Use Value: Restores simultaneous arrival of data bits at receiver, reducing setup/hold violations and enabling >100 MHz bus operation.

Programmable Clock Phase Shifter

Serial Interface Timing Alignment

Use Scenario: Generating multiple phase-shifted clock copies from a single master oscillator in FPGA-based digital signal processing systems.

IC Role / Device Role / Timing Role: Delay line configured in serial daisy-chain to produce discrete phase steps (e.g., 0°, 45°, 90°) for pipeline stage synchronization.

Use Value: Achieves deterministic phase relationships without PLL complexity; 137.5 ns max delay supports 7.25 MHz clock (137.5 ns = 1/7.27 MHz).

Use Scenario: Aligning data and strobe edges in custom serial protocols where transmitter/receiver timing margins are marginal.

IC Role / Device Role / Timing Role: Inserted between serializer output and line driver to shift data relative to clock or enable signals.

Use Value: Resolves timing violations caused by PCB routing asymmetry; ±8 ns accuracy ensures robust sampling across temperature and voltage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS1020-50 (DIP)	Same delay specs (10 ns + 0.5 ns/step), but in 16-pin DIP package; higher profile, through-hole mounting	Preferred for prototyping, breadboarding, or legacy through-hole production; not suitable for high-density SMT	Select DS1020-50 only when manual assembly or socket-based testing is required; DS1020S-50/T&R is optimal for volume SMT.
MAX962 (Maxim)	Fixed 2.5 ns delay; no programmability; 5 V operation; 8-pin SOIC; lower cost, no serial/parallel interface	Applicable only where fixed delay suffices (e.g., simple pulse stretching); lacks reconfigurability and fine resolution	Choose MAX962 only for cost-sensitive, static-delay applications; DS1020S-50/T&R remains necessary for adjustable timing.

Compared with DS1020-50 (DIP), DS1020S-50/T&R offers identical electrical timing but enables automated SMT assembly; compared with MAX962, it provides 256-step programmability and dual interface flexibility at higher unit cost and board area.

Availability

DS1020S-50/T&R is available at Aetrix Electronics and suitable for high-speed test instrumentation, digital logic synchronization, programmable clock generation, and serial interface timing alignment requiring stable component supply and guaranteed long-term sourcing.

Supply support for DS1020S-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

Dallas Semiconductor, acquired by Maxim Integrated in 2001, specialized in precision analog, timing, and mixed-signal ICs for industrial, communications, and test equipment markets.

The DS1020 product line was designed to replace unreliable hybrid delay lines with monolithic CMOS alternatives, targeting applications demanding repeatable nanosecond-level timing control without thermal or mechanical drift.

FAQ

What is the inherent delay of the DS1020S-50/T&R, and how does it affect total delay calculation?

The DS1020S-50/T&R has a fixed inherent delay of 10 ±2 ns, which is added to the programmable portion. Total delay equals 10 ns plus 0.5 ns multiplied by the 8-bit programmed value (0–255). For example, programming 0x80 yields 10 + (128 × 0.5) = 74 ns. This base delay is present even at zero programming and must be included in timing budget analysis for the DS1020S-50/T&R.

Can the DS1020S-50/T&R be used in both serial and parallel programming modes simultaneously?

No - the DS1020S-50/T&R operates exclusively in one mode at a time, selected by the S pin state: S = 1 enables parallel mode (P0–P7 active), S = 0 enables serial mode (C/D/Q active). Mixing modes causes undefined behavior. The DS1020S-50/T&R requires mode selection before programming and cannot accept concurrent serial and parallel commands.

What is the maximum clock frequency supported for serial programming of the DS1020S-50/T&R?

The DS1020S-50/T&R supports a maximum serial clock (C) frequency of 10 MHz, with minimum tCW (clock width) and tDSC (data setup) of 50 ns and 30 ns respectively. At 10 MHz, each bit transfer takes ≥100 ns, allowing full 8-bit load in ≤800 ns. Exceeding 10 MHz violates AC specifications and may cause incorrect register loading in the DS1020S-50/T&R.

Does the DS1020S-50/T&R support daisy-chaining for multi-device serial programming?

Yes - the DS1020S-50/T&R supports daisy-chaining: connect Q of one device to D of the next, with shared C and E lines. Each device shifts its prior register content out Q while loading new data via D. Total serial bits = 8 × number of devices, MSB-first. This capability is explicitly documented for the DS1020S-50/T&R in its functional description and Figure 3.

What is the output drive capability of the DS1020S-50/T&R, and can it directly drive 74LS logic?

The DS1020S-50/T&R outputs can sink 8 mA and source 1 mA, meeting the drive requirement for up to 10 × 74LS loads (each requiring 0.4 mA sink / 0.02 mA source). Its VOH ≥2.7 V and VOL ≤0.5 V at rated loads ensure valid TTL logic levels. Therefore, the DS1020S-50/T&R can directly drive 74LS without buffering in typical configurations.

DS1020S-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:: Programmable

Delay to 1st Tap:: 10ns

Tap Increment:: 500 ps

Available Total Delays:: 137.5ns

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

DS1020S-50/T&R FAQ

1.How can I place an order for DS1020S-50/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1020S-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 DS1020S-50/T&R reliable?

The price and inventory of DS1020S-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 DS1020S-50/T&R is usually 5 days.

3.What payment methods are accepted for DS1020S-50/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1020S-50/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1020S-50/T&R?

DS1020S-50/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1020S-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 DS1020S-50/T&R?

For technical support, including DS1020S-50/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1020S-50/T&R requirements.

6.How does Aetrix verify that DS1020S-50/T&R is sourced from the original manufacturer or authorized distributors?

All DS1020S-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 DS1020S-50/T&R meets industry standards.

7.What is the process for return or replacement of DS1020S-50/T&R?

All DS1020S-50/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1020S-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 DS1020S-50/T&R part is unused and in its original packaging.

Return procedure for DS1020S-50/T&R:

1.Submit a request within 90 days.

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

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