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Analog Devices Inc./Maxim Integrated DS1135U-25+
- Part No.:
- DS1135U-25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Delay Lines
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1135U-25+.pdf
- Description:
- IC DELAY LINE 25NS 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,116
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Product details
Overview
DS1135U-25+ from Maxim Integrated is a high-speed, all-silicon 3-in-1 delay line operating at +5V with three independent buffered outputs, each delivering precisely matched 25 ns propagation delay (tPLH/tPHL), ±1.5 ns initial tolerance, and ±2 ns tolerance over -40°C to +85°C. It preserves input signal symmetry with leading/trailing edge accuracy and drives up to 10 LS TTL loads - used in high-reliability clock alignment, pulse shaping, and timing skew correction in industrial control and test instrumentation.
For engineers reviewing the DS1135U-25+ datasheet, DS1135U-25+ pinout, DS1135U-25+ application, or DS1135U-25+ equivalent, key selection considerations include guaranteed 25 ns delay matching across all three outputs, SOIC-8 (150-mil) package compatibility, 5V-only operation, and direct replacement suitability for legacy DS1013/DS1035 designs requiring improved temperature stability and edge fidelity.
Technical Context
The DS1135U-25+ implements three independent, logic-buffered delay paths in a single monolithic silicon IC, with each path providing identical 25 ns nominal delay for both rising (tPLH) and falling (tPHL) edges. Delay accuracy is specified at ±1.5 ns over initial conditions and ±2 ns across full industrial temperature (-40°C to +85°C) and supply voltage (4.75V–5.25V) ranges.
It features TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), 2.0–2.5 ns output rise/fall times, and 100 ms power-up stabilization time. The device requires no external components, supports vapor phase, IR, and wave soldering, and is rated for 50 mA short-circuit output current for 1 second.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay per output | 25 ns (tPLH/tPHL), matched across all three outputs for skew-critical timing alignment |
| Initial delay tolerance | ±1.5 ns at +25°C, VCC = 5.0 V - enables precise setup/hold margin planning |
| Delay tolerance (–40°C to +85°C) | ±2 ns - ensures stable timing under industrial thermal stress without recalibration |
| Supply voltage | +5 V ±5% (4.75 V–5.25 V) - compatible with standard 5V logic rails, not 3V |
| Output drive capability | Drives ≥10 LS-TTL loads - eliminates need for external fanout buffers in most logic systems |
| Rise/fall time | 2.0–2.5 ns - maintains fast-edge integrity for sub-500 MHz pulse applications |
| Power-up time | 100 ms - defines minimum wait time before valid delays appear after VCC application |
Pinout & Package
DS1135U-25+ is housed in an 8-pin SOIC (150-mil) package, pin-compatible with industry-standard 8-SO footprint (outline 21-0041, land pattern 90-0096). All pins are surface-mount, RoHS-compliant, and qualified for vapor phase, IR, and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1, IN2, IN3 | Independent logic inputs | Accept TTL-level signals; each controls one dedicated 25 ns delay path |
| OUT1, OUT2, OUT3 | Buffered delay outputs | Provide low-skew, edge-accurate delayed copies of respective inputs; each drives ≥10 LS loads |
| VCC | Positive supply | +5 V ±5% supply input; decoupling required near pin for noise immunity |
| GND | Ground reference | Common return for all inputs, outputs, and internal circuitry; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| All-silicon construction | Eliminates aging, drift, and mechanical failure modes inherent in analog or SAW-based delay lines |
| Precision leading & trailing edge delay | Guarantees matched tPLH and tPHL - preserves input duty cycle and minimizes jitter accumulation |
| Three independent buffered delays | Enables parallel timing correction of multiple signal paths without cross-talk or loading interaction |
| Industrial temperature range support | Validated operation from –40°C to +85°C - suitable for uncontrolled environments like factory automation |
| Tape-and-reel packaging | Supports automated SMT assembly; standard reel quantity per JEDEC J-STD-020 |
Applications
| High-Speed Logic Skew Correction | Test Equipment Pulse Shaping |
|---|---|
Use Scenario: Compensating for trace-length-induced timing skew between parallel data lines in FPGA-to-ASIC interfaces. IC Role / Device Role / Timing Role: DS1135U-25+ provides matched 25 ns delay on selected lanes to realign setup/hold windows at the receiver. Use Value: Enables reliable 100+ MHz parallel bus operation without redesigning PCB layout or adding complex PLL-based deskew. | Use Scenario: Generating precisely timed, edge-aligned trigger pulses for oscilloscope calibration and ATE stimulus sequencing. IC Role / Device Role / Timing Role: DS1135U-25+ delivers three synchronized, 25 ns-delayed replicas of a master trigger with sub-nanosecond edge fidelity. Use Value: Replaces discrete RC networks or expensive programmable delay generators while maintaining ±2 ns channel-to-channel matching. |
| Digital Signal Integrity Enhancement | Legacy System Timing Upgrade |
Use Scenario: Restoring clean, symmetrical clock edges degraded by long traces or capacitive loading in industrial PLC backplanes. IC Role / Device Role / Timing Role: DS1135U-25+ acts as a re-timed, buffered clock repeater with preserved duty cycle and minimal jitter addition. Use Value: Improves timing margins by >1.5 ns compared to passive buffering, extending life of aging control hardware. | Use Scenario: Upgrading obsolete DS1013-based timing circuits in deployed medical analyzers requiring extended lifecycle support. IC Role / Device Role / Timing Role: DS1135U-25+ serves as a drop-in functional replacement with tighter delay tolerance and broader temperature coverage. Use Value: Reduces qualification effort - same pinout, same footprint, same 5V supply, but with ±2 ns vs. ±5 ns tolerance over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-output fixed-delay line applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1135Z-25+ | Same die, identical delay (25 ns), same SOIC-8 package, but Z-grade marked for commercial/industrial temp range - U-grade explicitly rated for full –40°C to +85°C | DS1135U-25+ is preferred for extended-temperature deployments; DS1135Z-25+ may lack full industrial temp validation | Select DS1135U-25+ when operating below 0°C or above +70°C is required; otherwise DS1135Z-25+ is cost-optimized |
| MAX96709 (delay-configurable variant) | Programmable 0–30 ns delay in 1 ns steps via I²C, but requires external configuration and power sequencing; larger 16-pin TQFN package | Suitable for adaptive timing systems needing field-adjustable delay; not pin-compatible or drop-in | Choose MAX96709 only if dynamic delay tuning is essential; DS1135U-25+ offers simpler, more robust fixed-delay implementation |
Compared with DS1135Z-25+, DS1135U-25+ guarantees full industrial temperature performance without derating; compared with MAX96709, it delivers lower system complexity, smaller footprint, and zero configuration overhead for static 25 ns delay needs.
Availability
DS1135U-25+ is available at Aetrix Electronics and suitable for industrial control systems, automated test equipment, and digital instrumentation requiring stable component supply, consistent 25 ns delay matching, and long-term obsolescence resilience.
Supply support for DS1135U-25+ 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 (now part of Analog Devices) designs precision analog, mixed-signal, and timing ICs for demanding industrial, automotive, and communications applications.
The DS1135 series was developed as a high-reliability, all-silicon replacement for aging hybrid delay lines - targeting applications where timing predictability, temperature stability, and long-term parametric consistency are critical.
FAQ
What is the exact delay value and tolerance specification for DS1135U-25+?
The DS1135U-25+ provides a nominal delay of 25 ns for each of its three outputs (tPLH and tPHL), with an initial tolerance of ±1.5 ns at +25°C and VCC = 5.0 V. Over the full industrial temperature range (–40°C to +85°C) and supply voltage range (4.75 V–5.25 V), the delay tolerance is ±2 ns - guaranteed by Maxim's production test flow and documented in the official DS1135 datasheet Rev 8/12.
Is DS1135U-25+ pin-compatible with DS1013 or DS1035?
Yes, DS1135U-25+ is a recommended replacement for DS1013 and DS1035, sharing the same 8-pin SOIC (150-mil) package and identical pin assignment (IN1–IN3, OUT1–OUT3, VCC, GND). No PCB layout changes are required; however, DS1135U-25+ improves upon those legacy parts with tighter delay tolerance, better temperature stability, and all-silicon reliability - making it a true drop-in upgrade.
Can DS1135U-25+ operate at 3.3V or other supply voltages?
No, DS1135U-25+ is specified exclusively for +5 V ±5% operation (4.75 V–5.25 V). It is not rated for 3.3 V, 2.5 V, or other supply levels. For 3 V operation, Maxim recommends the DS1135L family - a separate product line with different internal design and voltage scaling. Using DS1135U-25+ outside its 5 V range may result in undefined timing behavior or functional failure.
What is the maximum load DS1135U-25+ can drive per output?
Each output of DS1135U-25+ is characterized to drive at least 10 LS-TTL loads under worst-case conditions (–40°C to +85°C, VCC = 4.75 V). This corresponds to a total capacitive load of approximately 15 pF and DC current of ±12 mA (low-level) / –1 mA (high-level), enabling direct interfacing with standard logic families without external buffers in most applications.
Does DS1135U-25+ require external components or configuration?
No, DS1135U-25+ is a fully self-contained, fixed-delay IC requiring no external resistors, capacitors, clocks, or digital configuration. It operates immediately after power-up (with 100 ms stabilization time) using only VCC and GND. Its delay value is laser-trimmed during manufacturing and cannot be adjusted - simplifying design, reducing BOM count, and improving long-term timing consistency.
DS1135U-25+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Taps/Steps:
- -
- Function:
- Multiple, NonProgrammable
- Delay to 1st Tap:
- 25ns
- Tap Increment:
- -
- Available Total Delays:
- 25ns
- Number of Independent Delays:
- 3
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DS1135U-25+ FAQ
1.How can I place an order for DS1135U-25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1135U-25+ 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 DS1135U-25+ reliable?
The price and inventory of DS1135U-25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1135U-25+ is usually 5 days.
3.What payment methods are accepted for DS1135U-25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1135U-25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1135U-25+?
DS1135U-25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1135U-25+ 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 DS1135U-25+?
For technical support, including DS1135U-25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1135U-25+ requirements.
6.How does Aetrix verify that DS1135U-25+ is sourced from the original manufacturer or authorized distributors?
All DS1135U-25+ 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 DS1135U-25+ meets industry standards.
7.What is the process for return or replacement of DS1135U-25+?
All DS1135U-25+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1135U-25+, 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 DS1135U-25+ part is unused and in its original packaging.
Return procedure for DS1135U-25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1135U-25+ Tags
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