Analog Devices Inc./Maxim Integrated DS1100LU-50/TR

Overview

DS1100LU-50/TR from Maxim Integrated is a 3.3V, 5-tap silicon delay line with nominal delays of 10ns, 20ns, 30ns, 40ns, and 50ns across TAP1–TAP5. It operates from -40°C to +85°C, delivers TTL-/CMOS-compatible outputs, and drives up to 10 74LS loads per tap. Used in high-speed timing alignment, clock skew correction, and pulse-width adjustment circuits.

For engineers reviewing the DS1100LU-50/TR datasheet, DS1100LU-50/TR pinout, DS1100LU-50/TR application, or DS1100LU-50/TR equivalent, key selection criteria include guaranteed ±4ns input-to-tap delay tolerance over full temperature range, 3.0V–3.6V supply operation, µMAX-8 package footprint, leading/trailing edge precision, and 2.5ns max output rise/fall time.

Technical Context

The DS1100LU-50/TR implements an all-silicon delay architecture with five fixed, equally spaced taps-no external components or trimming required. Each tap reproduces both rising and falling edges with identical delay accuracy, enabling precise edge-aligned signal replication in synchronous logic paths.

It uses low-power CMOS circuitry with 10mA typical active current at 1MHz, supports vapor-phase and IR reflow soldering, and maintains stable delay performance across voltage (±0.3V) and temperature (–40°C to +85°C) variations due to unidirectional delay drift behavior across all taps.

Key Specifications

Pinout & Package

DS1100LU-50/TR is housed in an 8-pin µMAX package (U8+1 outline, 3mm × 3mm, 0.65mm pitch), compatible with standard SO-8 PCB footprints but with reduced area and thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100LU-50/TR, DS1100LZ-50+ offers greater thermal headroom in SO-8 but occupies 2.5× more PCB area; MC100EP195DG provides finer delay resolution and differential outputs but demands additional support circuitry and lacks the integrated 5-tap simplicity for deterministic digital timing alignment.

Availability

DS1100LU-50/TR is available at Aetrix Electronics and suitable for industrial control systems, automated test equipment, and high-speed data acquisition platforms requiring stable component supply and long-term obsolescence management.

Supply support for DS1100LU-50/TR 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, communications, and computing applications.

The DS1100L series was developed as an economy-grade silicon delay line family to replace hybrid delay modules with reliable, surface-mount alternatives for fixed-interval timing alignment.

FAQ

What is the maximum operating frequency supported by DS1100LU-50/TR?

The DS1100LU-50/TR does not specify a maximum operating frequency, but AC characteristics are tested at 1MHz input. Higher frequencies increase ICC and may reduce delay accuracy due to layout sensitivity and decoupling limitations. For stable operation, keep input period ≥2× tWI (e.g., ≥1μs for 500ns pulse width). DS1100LU-50/TR remains functional beyond 1MHz, but timing margins must be verified per application.

Does DS1100LU-50/TR require external termination resistors?

No, DS1100LU-50/TR does not require external termination resistors. Its outputs are designed to drive 74LS loads directly, with specified IOH/IOL under open-circuit conditions. However, for best signal integrity at high edge rates, minimize trace length and use local 0.1µF VCC decoupling. DS1100LU-50/TR output impedance is not matched to 50Ω, so transmission-line termination is unnecessary unless driving long traces.

Can DS1100LU-50/TR reproduce pulse widths accurately across all taps?

Yes, DS1100LU-50/TR is explicitly designed to reproduce both leading and trailing edges with equal precision, preserving pulse width integrity across all five taps. This is confirmed by identical tPLH and tPHL tolerances in the datasheet and validated by the "Both Leading- and Trailing-Edge Accuracy" feature. DS1100LU-50/TR achieves this via matched internal delay paths for rising and falling transitions.

Is DS1100LU-50/TR RoHS-compliant?

Yes, DS1100LU-50/TR is RoHS-compliant. The "+" suffix in the ordering code (e.g., DS1100LU-50+/T&R) indicates lead(Pb)-free packaging, and the device meets EU RoHS Directive 2011/65/EU requirements. DS1100LU-50/TR uses matte tin plating and halogen-free molding compound, with full compliance documentation available from Maxim Integrated's product change notices.

How does temperature affect delay variation across taps in DS1100LU-50/TR?

Temperature affects all taps unidirectionally: if one tap slows down with rising temperature, all others slow proportionally. DS1100LU-50/TR's delay variation is ±4ns over –40°C to +85°C for ≤40ns delays, and ±13% for the 50ns tap. This correlated drift preserves tap-to-tap spacing accuracy, making DS1100LU-50/TR suitable for applications requiring stable relative delays, such as multi-phase clock generation.