Analog Devices Inc./Maxim Integrated DS1135U-15

Overview

DS1135U-15 from Maxim Integrated is a high-speed, all-silicon 3-channel logic delay line operating at +5V with 15ns nominal delay per output (tPLH/tPHL), ±1.5ns tolerance over -40°C to +85°C, and leading/trailing edge precision preserving input symmetry. It replaces DS1013/DS1035 in timing-critical digital systems requiring stable multi-output skew control.

For engineers reviewing the DS1135U-15 datasheet, DS1135U-15 pinout, DS1135U-15 application, or DS1135U-15 equivalent, key selection criteria include guaranteed 15ns delay accuracy across temperature/voltage, 8-pin SOIC (150-mil) package compatibility, LS-TTL load drive capability (10 loads per output), and industrial-grade operating range (-40°C to +85°C).

Technical Context

The DS1135U-15 implements three independent buffered delay paths within a single monolithic silicon die, each delivering identical 15ns propagation delay for both rising (tPLH) and falling (tPHL) edges. Its architecture eliminates analog drift mechanisms found in RC-based delay lines, ensuring deterministic timing behavior under varying supply (4.75V–5.25V) and thermal conditions.

Each output features matched rise/fall times (2.0–2.5ns) and drives up to 10 LS-TTL loads while maintaining edge fidelity. The device requires no external components, supports vapor-phase, IR, and wave soldering, and achieves power-up stabilization within 100ms.

Key Specifications

Pinout & Package

DS1135U-15 is housed in an 8-pin SOIC package (150-mil width, outline 21-0041), RoHS-compliant, with standard surface-mount land pattern (90-0096). Pin 1 is IN2; pin 2 is GND; pin 3 is IN3; pin 4 is IN1; pin 5 is VCC; pin 6 is OUT1; pin 7 is OUT2; pin 8 is OUT3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-channel logic delay applications.

Compared with DS1135Z-15+ and DS1035-15, DS1135U-15 delivers superior delay stability (±1.5ns vs. ±3ns), full industrial temperature operation, and doubled LS-TTL drive capacity - making it optimal for mission-critical timing alignment in harsh environments.

Availability

DS1135U-15 is available at Aetrix Electronics and suitable for digital test equipment, industrial PLC timing modules, and communications backplane skew compensation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DS1135U-15 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, communications, and computing applications, with emphasis on reliability and parametric guarantee.

The DS1135 series belongs to Maxim's high-speed timing portfolio, engineered specifically for deterministic multi-output delay in digital systems where analog drift or component aging must be eliminated.

FAQ

What is the guaranteed delay accuracy of DS1135U-15 over temperature and voltage?

The DS1135U-15 guarantees ±1.5ns delay tolerance over the full industrial temperature range (-40°C to +85°C) and supply voltage range (4.75V to 5.25V). This specification applies to both tPLH and tPHL measurements at the 1.5V threshold, ensuring matched rising and falling edge delays critical for symmetric waveform generation. Initial tolerance at +25°C is ±1.0ns.

Is DS1135U-15 pin-compatible with DS1013 or DS1035?

Yes, DS1135U-15 is a direct replacement for DS1013 and DS1035 in the same 8-pin SOIC package, sharing identical pinout (IN1–IN3, OUT1–OUT3, VCC, GND). It maintains full electrical compatibility while offering improved delay accuracy, wider temperature range, and higher output drive capability - no PCB changes are required when upgrading from DS1013/DS1035 to DS1135U-15.

What load can each output of DS1135U-15 drive?

Each output of DS1135U-15 is rated to drive up to 10 LS-TTL loads, defined as the input characteristics of a standard 74F04 gate. This drive strength ensures clean signal transitions without external buffering in typical digital logic interfacing scenarios, including FPGA I/O banks, microcontroller peripherals, and discrete logic families operating at +5V.

Does DS1135U-15 require external components for operation?

No, DS1135U-15 operates as a fully self-contained delay element with no external resistors, capacitors, or trim components required. A local 0.1µF ceramic decoupling capacitor on VCC is recommended per standard high-speed logic practice, but the delay value, edge fidelity, and temperature stability are internally determined and factory-trimmed - simplifying design and reducing BOM count.

What is the power-up behavior of DS1135U-15?

DS1135U-15 requires 100ms after VCC reaches regulation to produce stable, accurate 15ns delays at all outputs. During this power-up time, outputs remain in a high-impedance or undefined state until internal biasing and reference circuits stabilize. This specification ensures predictable timing initialization in systems with sequenced power supplies or cold-start conditions.