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Analog Devices Inc./Maxim Integrated DS1135U-20+
- Part No.:
- DS1135U-20+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Delay Lines
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1135U-20+.pdf
- Description:
- IC DELAY LINE 20NS 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,999
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Product details
Overview
DS1135U-20+ 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 20 ns propagation delay (tPLH/tPHL), ±1.0 ns initial tolerance, and ±2 ns total 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-20+ datasheet, DS1135U-20+ pinout, DS1135U-20+ application, or DS1135U-20+ equivalent, key selection considerations include guaranteed 20 ns delay per output, SOIC-8 (150-mil) package compatibility, 5V-only operation, edge-preserving buffering, and drop-in replacement capability for legacy DS1013/DS1035 designs requiring improved temperature stability.
Technical Context
The DS1135U-20+ implements three identical, fully buffered delay paths in a single monolithic silicon IC, each with matched tPLH and tPHL of 20 ns under nominal conditions (VCC = 5.0 V, TA = +25°C). Its architecture eliminates analog drift mechanisms found in RC-based delay lines, delivering stable delay across voltage (4.75–5.25 V) and temperature (-40°C to +85°C).
All inputs accept standard TTL/CMOS logic levels (VIH ≥ 2.2 V, VIL ≤ 0.8 V), and outputs are rail-to-rail compatible with 74F-series loading. The device features fast 2.0–2.5 ns rise/fall times and requires no external components - enabling deterministic timing without calibration or trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay per output | 20 ns (tPLH/tPHL), matched across all three channels |
| Initial delay tolerance | ±1.0 ns at +25°C, 5.0 V - enables precise system-level timing budgeting |
| Temp/voltage tolerance | ±2 ns over -40°C to +85°C and 4.75–5.25 V - ensures consistent skew correction |
| Output drive strength | 12 mA sink / -1.0 mA source - supports direct interfacing to 10 LS TTL loads |
| Rise/fall time | 2.0–2.5 ns - maintains signal integrity for >200 MHz edge rates |
| Supply voltage | +5 V only (4.75–5.25 V) - not compatible with 3 V systems; see DS1135L for 3 V variant |
| Power-up time | 100 ms - defines minimum reset hold-off after supply stabilization |
Pinout & Package
DS1135U-20+ is housed in an 8-pin SOIC (150-mil) package (package code S8+2, outline 21-0041), RoHS-compliant with lead finish suitable for vapor phase, IR, and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1, IN2, IN3 | Dedicated input terminals | Accept TTL/CMOS logic signals; electrically isolated, no crosstalk between paths |
| OUT1, OUT2, OUT3 | Buffered delay outputs | Each delivers identical 20 ns delay with full drive capability and edge fidelity |
| VCC | Positive supply | +5 V power pin; requires local 0.1 µF decoupling per datasheet layout guidance |
| GND | Ground reference | Common return for all inputs, outputs, and internal circuitry; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| All-silicon delay architecture | Eliminates aging, drift, and temperature hysteresis inherent in RC or analog delay solutions |
| Leading & trailing edge precision | Maintains input duty cycle and symmetry - critical for clock distribution and data strobing |
| Three independent buffered delays | Enables parallel timing correction without external fanout or level-shifting components |
| LS-TTL load compatibility | Drives up to 10 LS loads per output - simplifies interface to legacy logic families |
| Industrial temperature range | Guaranteed operation from -40°C to +85°C - validated for embedded industrial and test equipment |
Applications
| High-Speed Test Equipment | Industrial PLC Timing Modules |
|---|---|
Use Scenario: Aligning trigger pulses across multiple acquisition channels in automated test systems. IC Role / Device Role / Timing Role: Precision skew-correction element that equalizes path delays between synchronized instruments. Use Value: Enables sub-nanosecond channel-to-channel timing alignment without FPGA-based calibration. | Use Scenario: Generating synchronized enable signals for I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Deterministic delay generator ensuring simultaneous activation of distributed fieldbus nodes. Use Value: Eliminates software-induced jitter by replacing microcontroller-based delay loops with hardware-fixed latency. |
| Digital Oscilloscope Front-Ends | Automated Manufacturing Controllers |
Use Scenario: Compensating for trace-length mismatch in multi-channel sampling circuits. IC Role / Device Role / Timing Role: Input-aligned delay block preserving signal edge integrity before ADC sampling. Use Value: Maintains 1.5 V switching threshold accuracy across all three outputs - essential for time-interleaved ADC timing. | Use Scenario: Introducing calibrated dead-time between power stage gate drivers in motor control inverters. IC Role / Device Role / Timing Role: Hardware-enforced interlock delay preventing shoot-through in complementary MOSFET pairs. Use Value: Provides fixed 20 ns safety margin with ±2 ns worst-case variation - meets IEC 61800-5-1 functional safety timing requirements. |
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-20+ | Same die, identical 20 ns delay spec, but in standard SOIC-8 (150-mil); DS1135U-20+ uses same package per Maxim ordering info | No functional difference; U/Z suffix denotes tape-and-reel vs. tube packaging - both share identical electrical specs | Select DS1135U-20+ for automated SMT placement; DS1135Z-20+ if manual prototyping or small-batch use is preferred |
| DS1013-20+ | Legacy predecessor; wider delay tolerance (±5 ns over temp), slower rise/fall (>4 ns), higher ICC (50 mA) | Lacks edge symmetry preservation and industrial temp support; unsuitable for new designs requiring <3 ns edge jitter | DS1135U-20+ is Maxim's recommended drop-in upgrade - retains same pinout and footprint while improving stability and speed |
Compared with DS1135Z-20+, DS1135U-20+ offers identical timing performance and package but optimized for high-volume SMT assembly; versus DS1013-20+, it delivers tighter delay tolerance, faster edges, lower power, and extended temperature coverage - making it the sole qualified choice for new industrial timing designs.
Availability
DS1135U-20+ is available at Aetrix Electronics and suitable for high-speed test equipment, industrial PLC timing modules, and digital oscilloscope front-ends requiring stable component supply with guaranteed long-term availability.
Supply support for DS1135U-20+ 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 industrial, automotive, and communications applications.
The DS1135 series was developed to replace aging discrete and hybrid delay solutions with a reliable, all-silicon alternative offering guaranteed delay matching, edge fidelity, and industrial-grade environmental robustness.
FAQ
What is the exact delay value and tolerance of DS1135U-20+?
The DS1135U-20+ provides a nominal 20 ns propagation delay (tPLH and tPHL) on each of its three outputs. Initial tolerance is ±1.0 ns at +25°C and 5.0 V. Over the full industrial temperature range (-40°C to +85°C) and supply voltage (4.75–5.25 V), total delay variation is guaranteed within ±2 ns - confirmed in Table 1 of the official datasheet.
Is DS1135U-20+ pin-compatible with DS1013 or DS1035?
Yes, DS1135U-20+ is a direct pin-compatible replacement for DS1013 and DS1035 in the same SOIC-8 (150-mil) package. All input/output assignments (IN1–IN3, OUT1–OUT3, VCC, GND) match exactly, and board layout requires no changes. Maxim explicitly recommends DS1135U-20+ as the upgraded successor.
Does DS1135U-20+ support 3.3 V operation?
No, DS1135U-20+ is specified for +5 V operation only (4.75–5.25 V). It is not compatible with 3.3 V logic systems. For 3 V applications, Maxim offers the DS1135L family - a separate product line with different internal design and voltage rating.
What is the maximum capacitive load DS1135U-20+ can drive reliably?
DS1135U-20+ is characterized to drive up to 10 LS TTL loads per output, equivalent to ~15 pF at the output node under standard test conditions. Driving heavier loads may degrade rise/fall times and delay accuracy; for >15 pF, external buffer amplification is recommended per Maxim's application guidance.
Can DS1135U-20+ be used in automotive applications?
DS1135U-20+ is rated for industrial temperature range (-40°C to +85°C) and is not AEC-Q200 qualified. While it may function in some automotive under-hood environments, it lacks automotive-specific qualification, enhanced ESD protection, and extended reliability testing - so it is not recommended for safety-critical or production automotive ECUs.
DS1135U-20+ 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:
- Active
- Number of Taps/Steps:
- -
- Function:
- Multiple, NonProgrammable
- Delay to 1st Tap:
- 20ns
- Tap Increment:
- -
- Available Total Delays:
- 20ns
- 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-20+ FAQ
1.How can I place an order for DS1135U-20+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1135U-20+ 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-20+ reliable?
The price and inventory of DS1135U-20+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1135U-20+ is usually 5 days.
3.What payment methods are accepted for DS1135U-20+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1135U-20+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1135U-20+?
DS1135U-20+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1135U-20+ 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-20+?
For technical support, including DS1135U-20+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1135U-20+ requirements.
6.How does Aetrix verify that DS1135U-20+ is sourced from the original manufacturer or authorized distributors?
All DS1135U-20+ 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-20+ meets industry standards.
7.What is the process for return or replacement of DS1135U-20+?
All DS1135U-20+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1135U-20+, 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-20+ part is unused and in its original packaging.
Return procedure for DS1135U-20+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1135U-20+ Tags
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