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Analog Devices Inc./Maxim Integrated DS1023S-25/T&R
- Part No.:
- DS1023S-25/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Delay Lines
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
DS1023S-25/T&R.pdf
- Description:
- IC DEL LN 256TAP 63.75NS 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
DS1023S-25/T&R from Maxim Integrated (formerly Dallas Semiconductor) is an 8-bit programmable silicon delay line IC with 0.25 ns step resolution, supporting delay ranges up to 63.75 ns, on-chip reference delay for 0–360° phase control, and configurable operation as delay line, pulse-width modulator, or free-running oscillator. It operates from a single 5V supply and is used in clock deskewing, jitter reduction, and timing calibration circuits.
For engineers reviewing the DS1023S-25/T&R datasheet, DS1023S-25/T&R pinout, DS1023S-25/T&R application, or DS1023S-25/T&R equivalent, key selection considerations include guaranteed monotonicity, parallel/serial programming flexibility, 25 MHz maximum input frequency, 20 ns minimum input pulse width, and SOIC-16 package compatibility with legacy DIP layouts.
Technical Context
The DS1023S-25/T&R implements a digitally programmable tapped delay line architecture with internal gating logic enabling PWM generation and oscillator configuration via external feedback. Its on-chip reference delay (18–22 ns) cancels step-zero variation, enabling true zero-relative delay measurement against REF output.
It supports two distinct output modes via MS pin: normal delay (OUT = non-inverted delayed signal, REF = fixed reference) or PWM/inverted mode (PWM = rising-edge-triggered pulse, OUT = inverted delayed signal). Serial programming uses shared P0/P1/P2 pins with MSB-first loading; parallel mode latches P0–P7 via LE control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay Step Size | 0.25 ns - enables fine-grained timing adjustment for sub-nanosecond phase alignment. |
| Max Absolute Delay | 80 ns - covers full 360° phase shift at 25 MHz clock (40 ns period). |
| Reference Delay | 18–22 ns - trimmed fixed offset used to nullify step-zero variation for accurate relative delay measurement. |
| Input Frequency Limit | 25 MHz - defines maximum usable clock rate in normal delay mode with 40 ns minimum period. |
| Min Input Pulse Width | 20 ns - ensures reliable triggering in delay and PWM modes without pulse dropout. |
| Supply Voltage | 4.75–5.25 V - single-rail CMOS operation compatible with standard TTL/CMOS logic interfaces. |
| Integral Non-linearity | ±1 ns - maximum deviation from ideal linear delay vs. programmed code, critical for precision timing systems. |
Pinout & Package
DS1023S-25/T&R is housed in a 16-pin 300-mil SOIC package (JEDEC MS-012), pin-compatible with DS1023 DIP variants and suitable for surface-mount assembly with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Primary Signal Input | Accepts clock or trigger waveform; all delay/PWM/oscillator functions originate here. |
| OUT / OUT | Programmable Delay Output | Delivers non-inverted (MS=0) or inverted (MS=1) delayed copy of IN; used for phase-shifted clocks or oscillator feedback. |
| REF / PWM | Reference or PWM Output | Provides fixed 18–22 ns reference delay (MS=0) or rising-edge-triggered variable-width pulse (MS=1). |
| P0–P7 | Parallel Programming Inputs | 8-bit code sets delay value in parallel mode; P0–P2 double as serial I/O when P/S = 1. |
| LE | Latch Enable | High enables real-time update of parallel inputs; low latches current value for stable delay output. |
| P/S | Programming Mode Select | Low = parallel mode; high = serial mode; polarity inverted vs. DS1020/DS1021. |
| MS | Output Mode Select | Low = OUT/REF mode; high = OUT/PWM mode; determines functional assignment of dual-output pins. |
| GND / VCC | Power Terminals | Ground reference and +5V supply; decoupling required per high-speed CMOS layout practice. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip reference delay | Enables true zero-relative delay measurement by compensating for step-zero variation, eliminating system-level calibration. |
| Guaranteed monotonicity | Ensures delay increases strictly with increasing program code-no hysteresis or reversal-critical for closed-loop timing control. |
| Dual-mode output configuration | Single device serves three roles: precise delay line (MS=0), PWM generator (MS=1), or free-running oscillator (OUT→IN feedback). |
| Serial daisy-chaining | Allows cascaded programming of multiple DS1023S-25/T&R units using one serial bus, reducing MCU GPIO count in multi-channel systems. |
| Configurable input latch behavior | LE pin supports both edge-triggered latching (for multiplexed buses) and static high-level enable (for hard-wired applications). |
Applications
| Clock Deskewing | Phase-Controlled Clock Distribution |
|---|---|
|
Use Scenario: Aligning clock edges across multiple ASIC/FPGA domains on a high-speed PCB to meet setup/hold timing. IC Role / Device Role / Timing Role: DS1023S-25/T&R provides adjustable, repeatable delay on individual clock branches to compensate for trace-length mismatches. Use Value: Achieves sub-0.25 ns inter-channel skew correction without requiring custom PCB revisions or discrete RC networks. |
Use Scenario: Generating quadrature or arbitrary-phase clock signals from a master oscillator in RF transceivers or ADC/DAC sampling systems. IC Role / Device Role / Timing Role: DS1023S-25/T&R acts as a digitally tunable phase shifter, using REF as reference and OUT as variable-delay output. Use Value: Enables software-controlled 0–360° phase coverage with 0.25 ns resolution, replacing analog PLL-based solutions with deterministic latency. |
| Pulse Width Modulation | Free-Running Oscillator |
|
Use Scenario: Generating precision timing pulses for laser diode drivers, LED dimming, or gate drive signals in power converters. IC Role / Device Role / Timing Role: DS1023S-25/T&R operates in MS=1 mode, where REF/PWM outputs pulses triggered by IN with width set by P0–P7. Use Value: Delivers 5–63.75 ns programmable pulse widths at up to 25 MHz repetition rate, with no external components required. |
Use Scenario: Creating low-jitter, temperature-stable clock sources for test equipment or isolated subsystems where crystal oscillators are impractical. IC Role / Device Role / Timing Role: DS1023S-25/T&R is configured as an oscillator by connecting OUT to IN; frequency determined by programmed delay value. Use Value: Generates 6.6–22 MHz output frequencies with ±1 ns delay stability, avoiding crystal load capacitance tuning and startup delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable delay line applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1023-25 | DIP-16 package; identical electrical specs and pinout; lacks tape-and-reel packaging. | Suitable for prototyping, through-hole assembly, or socketed evaluation; not optimized for automated SMT lines. | Select DS1023-25 only for hand-soldered or breadboard use; DS1023S-25/T&R preferred for production SMT. |
| MAX9622 | Analog delay IC with 0.1–10 ns range; voltage-controlled (not digital); no REF output or PWM mode. | Limited to narrow-range analog trimming; cannot perform phase rotation or oscillator functions. | Choose MAX9622 only for ultra-fine (<0.1 ns) analog delay tuning where digital control is unnecessary. |
Compared with DS1023-25, DS1023S-25/T&R offers identical timing performance in a surface-mount package with tape-and-reel delivery, while MAX9622 provides analog fine-tuning but lacks digital programmability, reference delay, and multimode functionality.
Availability
DS1023S-25/T&R is available at Aetrix Electronics and suitable for clock deskewing, phase-controlled clock distribution, and precision PWM generation requiring stable component supply across industrial, test & measurement, and communications equipment programs.
Supply support for DS1023S-25/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.
The DS1023S-25/T&R belongs to Maxim's programmable timing element product line, designed specifically for applications demanding deterministic, digitally controlled nanosecond-scale delays in clock integrity and signal conditioning systems.
FAQ
What is the minimum input pulse width supported by DS1023S-25/T&R?
The DS1023S-25/T&R requires a minimum input pulse width of 20 ns in normal delay and PWM modes, as specified in its AC electrical characteristics table. Pulses narrower than this may cause unreliable triggering or degraded output levels. This limit ensures sufficient time for internal logic sampling and avoids metastability in the delay path. The DS1023S-25/T&R maintains full functionality-including monotonic delay response and REF/OUT alignment-only when this spec is met.
How does the reference delay (REF) improve timing accuracy in DS1023S-25/T&R?
The DS1023S-25/T&R's on-chip reference delay (18–22 ns) is trimmed to exceed the step-zero delay, enabling true zero-relative delay measurement. By measuring OUT delay against REF instead of ground-referenced IN, variations from input voltage, slew rate, and process temperature are canceled. This makes DS1023S-25/T&R suitable for high-accuracy phase alignment where absolute delay drift would otherwise degrade system timing margins.
Can DS1023S-25/T&R generate a free-running oscillator, and how is it configured?
Yes, DS1023S-25/T&R can operate as a free-running oscillator by connecting its OUT pin to the IN pin externally while setting MS = 1. In this configuration, the device inverts and delays the signal on each pass, establishing oscillation at a frequency determined by twice the programmed delay value. The DS1023S-25/T&R supports output frequencies from 6.6 MHz to 22 MHz depending on the selected delay code, with no external components required beyond the feedback trace.
What is the difference between DS1023S-25/T&R and DS1023-25?
The DS1023S-25/T&R and DS1023-25 share identical electrical specifications, pinout, and functional behavior, differing only in package and packaging format: DS1023S-25/T&R uses a 16-pin SOIC package and ships in tape-and-reel for SMT assembly, whereas DS1023-25 uses a 16-pin DIP package and is typically supplied in tubes. Both are drop-in replacements electrically, but DS1023S-25/T&R is intended for automated manufacturing environments.
Does DS1023S-25/T&R support daisy-chained serial programming?
Yes, DS1023S-25/T&R supports daisy-chained serial programming: its Q/P0 pin outputs the MSB of the internal register during readback, allowing the serial output of one DS1023S-25/T&R to feed the D/P2 input of the next. This enables simultaneous programming of multiple units using a single serial interface, reducing MCU resource usage in multi-channel timing systems. Each device requires eight clock cycles, and the resistor-based auto-restoration circuit (1–10 kΩ) must be used to preserve values during read operations.
DS1023S-25/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:
- 250 ps
- Available Total Delays:
- 63.75ns
- 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-25/T&R FAQ
1.How can I place an order for DS1023S-25/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1023S-25/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-25/T&R reliable?
The price and inventory of DS1023S-25/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-25/T&R is usually 5 days.
3.What payment methods are accepted for DS1023S-25/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1023S-25/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1023S-25/T&R?
DS1023S-25/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1023S-25/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-25/T&R?
For technical support, including DS1023S-25/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1023S-25/T&R requirements.
6.How does Aetrix verify that DS1023S-25/T&R is sourced from the original manufacturer or authorized distributors?
All DS1023S-25/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-25/T&R meets industry standards.
7.What is the process for return or replacement of DS1023S-25/T&R?
All DS1023S-25/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1023S-25/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-25/T&R part is unused and in its original packaging.
Return procedure for DS1023S-25/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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