My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1135LU-25+
- Part No.:
- DS1135LU-25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Delay Lines
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1135LU-25+.pdf
- Description:
- IC DELAY LINE 25NS 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,261
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1135LU-25+ from Maxim Integrated is a 3V, 3-in-1 high-speed silicon delay line delivering three independent buffered delays of precisely 25 ns each (tPLH/tPHL), with ±1.5 ns initial tolerance and ±5.0 ns total variation over -40°C to +85°C and 2.7V–3.6V supply. It preserves input signal symmetry via leading/trailing edge accuracy and targets timing-critical digital logic synchronization in industrial control and test instrumentation.
For engineers reviewing the DS1135LU-25+ datasheet, DS1135LU-25+ pinout, DS1135LU-25+ application, or DS1135LU-25+ equivalent, this page provides verified delay accuracy, SO-8 package mapping, temperature/voltage stability data, and direct functional alternatives for logic-level pulse delay substitution.
Technical Context
The DS1135LU-25+ implements all-silicon delay circuitry without external components, supporting simultaneous propagation of three independent input signals (IN1–IN3) through matched internal paths to produce synchronized 25 ns output delays at OUT1–OUT3. Each path maintains identical tPLH/tPHL specifications and edge fidelity under full industrial voltage and temperature range.
It operates strictly as a fixed-delay buffer-not programmable or adjustable-with no internal PLL, clock multiplication, or feedback loop. Delay stability relies on monolithic silicon timing elements, eliminating quartz or RC-based drift mechanisms and enabling vapor-phase and IR reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay per output | 25 ns (tPLH/tPHL), identical across all three channels |
| Initial delay tolerance | ±1.5 ns at +25°C, VCC = 3.3 V |
| Delay variation over temp/volt | ±5.0 ns across -40°C to +85°C and 2.7V–3.6V |
| Supply voltage range | 2.7 V to 3.6 V - supports 3V system rails with margin |
| Output rise/fall time | 2.0 ns (min) to 2.5 ns (max) - ensures fast edge integrity |
| Power-up time | 1 ms - defines minimum stabilization delay after VCC application |
| Input capacitance | 10 pF - low loading on driving logic gates |
Pinout & Package
DS1135LU-25+ is housed in an 8-pin SOIC (150-mil width), pin-compatible with industry-standard SO-8 footprints (land pattern 90-0096). The package is RoHS-compliant and rated for vapor-phase and IR reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1, IN2, IN3 | Dedicated input terminals | Accept TTL/CMOS-compatible logic pulses; each drives one independent 25 ns delay path |
| OUT1, OUT2, OUT3 | Dedicated output terminals | Deliver buffered, edge-accurate 25 ns delayed copies of respective inputs |
| VCC | Positive supply | +3V nominal supply pin; must be decoupled locally for noise immunity |
| GND | Ground reference | Common return for all inputs, outputs, and internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| All-silicon delay architecture | Eliminates quartz resonators or RC networks-enables full reflow compatibility and long-term aging stability |
| Leading and trailing edge precision | Maintains input pulse symmetry (duty cycle preservation) across full operating range |
| Three independent buffered delays | Enables parallel delay of multiple control or clock signals without crosstalk or shared path skew |
| Industrial temperature support | Guaranteed 25 ns delay performance from -40°C to +85°C without derating |
| Low input capacitance | 10 pF loading minimizes impact on upstream driver timing and signal integrity |
Applications
| Logic-Level Pulse Synchronization | Digital Test Equipment Timing |
|---|---|
Use Scenario: Aligning asynchronous enable signals across multiple FPGA I/O banks to meet setup/hold timing windows. IC Role / Device Role / Timing Role: Fixed 25 ns delay element inserted in critical control paths to compensate for PCB trace skew. Use Value: Eliminates need for manual trace-length tuning; guarantees deterministic inter-signal alignment within ±5 ns over full industrial range. | Use Scenario: Generating precisely offset trigger pulses for multi-channel oscilloscope or logic analyzer calibration. IC Role / Device Role / Timing Role: Three-channel delay generator producing synchronized but staggered strobes for channel-to-channel timing verification. Use Value: Enables sub-nanosecond relative timing resolution between instrument channels using a single monolithic device. |
| Industrial PLC Input Conditioning | High-Speed Digital Bus Skew Compensation |
Use Scenario: Debouncing and delaying noisy sensor inputs in programmable logic controllers before state evaluation. IC Role / Device Role / Timing Role: Edge-accurate delay stage that filters glitches while preserving valid transition timing. Use Value: Provides deterministic 25 ns window for metastability resolution without adding jitter or duty-cycle distortion. | Use Scenario: Compensating for unequal trace lengths in parallel DDR or LVDS bus routing on embedded controller boards. IC Role / Device Role / Timing Role: Matched delay insertion on slower bus lines to realign data eye centers at receiver inputs. Use Value: Restores timing margin up to 50 ps per channel without requiring layout revision or custom impedance matching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-delay line applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1135LZ-25+ | Same die, identical delay specs and pinout; differs only in tape-and-reel packaging (S8+2 vs U-8) | No functional difference; suitable for same PCBs and use cases | Select DS1135LZ-25+ for automated pick-and-place; DS1135LU-25+ for manual or low-volume prototyping |
| MAX9602EUA+ | Single-output 25 ns delay, µMAX-8 package, higher ICC (15 mA), wider VCC range (2.7V–5.5V) | Lacks triple-output capability; requires three units for equivalent functionality | Choose MAX9602EUA+ only when board space allows discrete placement and 5V compatibility is required |
Compared with DS1135LZ-25+, DS1135LU-25+ offers identical electrical performance in a different packaging format, while MAX9602EUA+ trades integration for voltage flexibility and single-channel simplicity-making DS1135LU-25+ optimal for compact, multi-signal delay consolidation.
Availability
DS1135LU-25+ is available at Aetrix Electronics and suitable for industrial automation, test equipment design, and embedded control systems requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for DS1135LU-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 and mixed-signal ICs for industrial, automotive, and communications applications, emphasizing reliability, integration, and thermal robustness.
The DS1135L series was developed specifically for high-stability, fixed-time digital pulse delay in noise-sensitive and thermally variable environments-replacing legacy DS1033 solutions with improved edge fidelity and 3V operation.
FAQ
What is the exact delay value and tolerance of DS1135LU-25+?
The DS1135LU-25+ delivers a nominal delay of 25 ns on all three outputs (tPLH and tPHL), with an initial tolerance of ±1.5 ns at +25°C and VCC = 3.3 V. Over the full industrial range (-40°C to +85°C, 2.7V–3.6V), total delay variation is guaranteed within ±5.0 ns. This applies identically to IN1→OUT1, IN2→OUT2, and IN3→OUT3 paths.
Is DS1135LU-25+ pin-compatible with DS1033 series devices?
DS1135LU-25+ is specified as a recommended replacement for DS1033, but it is not pin-compatible: DS1033 uses 14-pin DIP/SO packages with different pin assignments and dual-output topology, whereas DS1135LU-25+ uses an 8-pin SO package with three independent inputs/outputs. Board redesign is required for migration.
Does DS1135LU-25+ support 5V logic inputs or outputs?
No. DS1135LU-25+ is a 3V-only device. Its absolute maximum input voltage is +6.0 V, but DC electrical characteristics (VIH/VIL) and AC timing are fully specified only for VCC = 2.7V–3.6V. Driving it with 5V logic violates its guaranteed operating conditions and may cause timing errors or reliability degradation.
Can DS1135LU-25+ be used with non-50Ω source impedances?
Yes, but performance depends on source impedance matching. The DS1135LU-25+ datasheet specifies test conditions with ≤50Ω source impedance and 15pF load. Using higher source impedance may increase input rise/fall times and degrade delay accuracy, especially near minimum pulse width limits (100% of delay value = 25 ns).
What is the power-up behavior of DS1135LU-25+?
DS1135LU-25+ requires 1 ms after VCC reaches regulation to produce stable 25 ns delays at its outputs. During this power-up time (tPU), outputs remain in a high-impedance or undefined state. System designs must ensure control logic remains inactive or masked until after this stabilization period.
DS1135LU-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:
- Tube
- Product Status:
- Obsolete
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DS1135LU-25+ FAQ
1.How can I place an order for DS1135LU-25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1135LU-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 DS1135LU-25+ reliable?
The price and inventory of DS1135LU-25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1135LU-25+ is usually 5 days.
3.What payment methods are accepted for DS1135LU-25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1135LU-25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1135LU-25+?
DS1135LU-25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1135LU-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 DS1135LU-25+?
For technical support, including DS1135LU-25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1135LU-25+ requirements.
6.How does Aetrix verify that DS1135LU-25+ is sourced from the original manufacturer or authorized distributors?
All DS1135LU-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 DS1135LU-25+ meets industry standards.
7.What is the process for return or replacement of DS1135LU-25+?
All DS1135LU-25+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1135LU-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 DS1135LU-25+ part is unused and in its original packaging.
Return procedure for DS1135LU-25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1135LU-25+ Tags
-
LTC6994CS6-1#TRMPBF
Analog Devices Inc.
-
LTC6994CDCB-1#TRMPBF
Analog Devices Inc.
-
LTC6994IS6-1#TRMPBF
Analog Devices Inc.
-
LTC6994IS6-1#TRPBF
Analog Devices Inc.
-
LTC6994IDCB-1#TRMPBF
Analog Devices Inc.
-
LTC6994IS6-2#TRMPBF
Analog Devices Inc.
-
LTC6994HS6-1#TRPBF
Analog Devices Inc.
-
LTC6994HS6-1#TRMPBF
Analog Devices Inc.
-
LTC6994HS6-2#TRMPBF
Analog Devices Inc.
-
LTC6994HDCB-2#TRMPBF
Analog Devices Inc.
-
LTC6994HDCB-1#TRMPBF
Analog Devices Inc.
-
DS1124U-25+T
Analog Devices Inc./Maxim Integrated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
