Analog Devices Inc./Maxim Integrated DS1135LU-30+T

Overview

DS1135LU-30+T from Maxim Integrated is a 3V, 3-in-1 high-speed silicon delay line delivering three independent buffered delays of precisely 30 ns each (tPLH/tPHL), with ±1.5 ns initial tolerance and ±5.0 ns total variation over -40°C to +85°C. It preserves input signal symmetry via leading/trailing edge precision and targets timing-critical applications such as clock deskewing and pulse shaping in industrial control and test instrumentation.

For engineers reviewing the DS1135LU-30+T datasheet, DS1135LU-30+T pinout, DS1135LU-30+T application, or DS1135LU-30+T equivalent, key selection criteria include guaranteed 30 ns delay accuracy across voltage (2.7–3.6 V) and temperature, 8-pin SOIC (150-mil) package compatibility, and direct replacement capability for legacy DS1033-based designs requiring improved edge fidelity and low-power 3V operation.

Technical Context

The DS1135LU-30+T implements an all-silicon delay architecture with three independent logic-buffered delay paths, each delivering identical 30 ns propagation (tPLH = tPHL = 30 ns). Its design ensures matched rise/fall delay characteristics and maintains input duty cycle integrity through precise edge alignment.

It operates strictly within a 2.7 V to 3.6 V supply range and guarantees stable delay performance over industrial temperature (-40°C to +85°C), with output rise/fall times ≤2.5 ns and power-up stabilization within 1 ms. No external components or configuration are required - it functions as a fixed, passive timing element with TTL/CMOS-compatible I/O.

Key Specifications

Pinout & Package

DS1135LU-30+T is housed in an 8-pin SOIC package (150-mil width, outline 21-0041), RoHS-compliant and vapor-phase/reflow solderable. Pin numbering follows standard SOIC convention with Pin 1 at top-left corner (notch or mark side).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1135LZ-30+, DS1135LU-30+T offers identical electrical performance but optimized tape-and-reel handling; versus DS1033S-30+, it delivers lower voltage operation, faster edges, and broader temperature coverage - making it the preferred drop-in upgrade for modern 3V industrial timing designs.

Availability

DS1135LU-30+T is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and high-speed digital system design requiring stable component supply, guaranteed 30 ns delay accuracy, and RoHS-compliant 3V timing solutions.

Supply support for DS1135LU-30+T 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 performance under stress.

The DS1135L series was developed to replace aging discrete or crystal-based delay solutions with a robust, all-silicon alternative offering guaranteed nanosecond-level timing accuracy in compact SOIC packages.

FAQ

What is the guaranteed delay accuracy of DS1135LU-30+T over temperature and voltage?

The DS1135LU-30+T guarantees ±5.0 ns total delay variation across the full industrial temperature range (-40°C to +85°C) and supply voltage range (2.7 V to 3.6 V). This includes both initial tolerance (±1.5 ns at +25°C) and additional drift due to environmental changes - verified per Table 1 in the official Maxim datasheet. DS1135LU-30+T maintains this spec without calibration or trimming.

Is DS1135LU-30+T pin-compatible with DS1033-series delay lines?

DS1135LU-30+T uses an 8-pin SOIC package identical in footprint and pinout to DS1033S-30+, enabling direct PCB replacement without layout changes. However, DS1135LU-30+T operates at 3V (2.7–3.6 V), while DS1033S-30+ requires 5V (4.5–5.5 V); voltage translation may be needed if upstream logic remains 5V. DS1135LU-30+T retains the same IN1–IN3 / OUT1–OUT3 / VCC / GND assignment.

Does DS1135LU-30+T require external components or configuration?

No, DS1135LU-30+T is a fully self-contained, fixed-delay device requiring only VCC and GND connections. It contains no registers, clocks, or programmable elements - delay value is hard-coded in silicon. No pull-ups, bypass capacitors beyond standard 0.1 µF local decoupling, or configuration pins are needed. DS1135LU-30+T begins delivering stable 30 ns delays within 1 ms of power application.

What is the maximum input frequency supported by DS1135LU-30+T?

DS1135LU-30+T supports input pulse periods down to 2× the specified delay value (i.e., minimum 60 ns period, or ~16.7 MHz max fundamental frequency), per AC Electrical Characteristics. Input pulse width must be ≥100% of delay (≥30 ns), and rise/fall times must be ≤3.0 ns (20%–80%). DS1135LU-30+T reliably processes repetitive digital waveforms meeting these constraints without jitter accumulation or duty cycle degradation.

Can DS1135LU-30+T drive standard logic families directly?

Yes, DS1135LU-30+T outputs are designed to drive one 74F04-equivalent load (≈20 pF, 1 mA sink/source), matching standard TTL and CMOS fan-out requirements. It delivers VOH ≥2.0 V at 1 mA and VOL ≤0.4 V at 8 mA under 2.7 V supply, ensuring noise margins with 3V logic families. For heavier loads, a buffer stage is recommended. DS1135LU-30+T's outputs remain fully compatible with downstream 74LVC, 74ALVC, and similar 3V logic interfaces.