Analog Devices Inc./Maxim Integrated DS1100LU-250+T

Overview

DS1100LU-250+T from Maxim Integrated is a 3.3V, 5-tap silicon delay line with nominal delays of 50ns, 100ns, 150ns, 200ns, and 250ns across TAP1–TAP5. It operates from 3.0V to 3.6V over –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 for test equipment and digital signal synchronization.

For engineers reviewing the DS1100LU-250+T datasheet, DS1100LU-250+T pinout, DS1100LU-250+T application, or DS1100LU-250+T equivalent, key selection criteria include tap delay precision (±4ns at –40°C to +85°C for ≤40ns delays), leading/trailing edge matching, 2.5ns max output rise/fall time, and µMAX-8 package compatibility with vapor-phase and IR reflow.

Technical Context

The DS1100LU-250+T implements an all-silicon delay architecture with five fixed, equally spaced taps-no external components or clock required. Each tap reproduces the input logic state after its specified delay, preserving both edge polarities with equal accuracy.

It uses low-power CMOS circuitry, supports 1MHz input frequency under active current specification (10mA typical), and maintains delay stability across voltage (3.0V–3.6V) and temperature (–40°C to +85°C), with unidirectional delay drift across all taps under varying conditions.

Key Specifications

Pinout & Package

DS1100LU-250+T is housed in an 8-pin µMAX package (U8+1 outline, 3mm × 3mm, 0.65mm pitch), RoHS-compliant and compatible with standard IR/vapor-phase reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100LU-250+T, DS1023-250+T offers broader voltage tolerance but looser absolute delay accuracy and incompatible supply rails, while SY100ELT22LZG provides faster edge rates but lacks multi-tap flexibility and fixed-delay determinism required for skew calibration.

Availability

DS1100LU-250+T is available at Aetrix Electronics and suitable for high-speed test instrumentation, digital signal alignment, logic glitch suppression, and programmable pulse width control requiring stable component supply and long-term obsolescence management.

Supply support for DS1100LU-250+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, mixed-signal, and timing solutions for industrial, communications, and computing applications.

The DS1100L series targets cost-sensitive, high-reliability timing applications needing fixed, multi-point delays without programmability - optimized for PCB space savings and solder-reflow compatibility in automated assembly.

FAQ

What is the operating temperature range for DS1100LU-250+T?

The DS1100LU-250+T is fully specified and tested over –40°C to +85°C. All electrical parameters-including delay tolerance (±4ns for ≤40ns taps), output drive, and supply current-are guaranteed across this industrial temperature range, making DS1100LU-250+T suitable for deployment in harsh-environment embedded systems without derating.

Does DS1100LU-250+T require external components for basic operation?

No, DS1100LU-250+T operates as a standalone delay element with only a 0.1µF ceramic decoupling capacitor required on the VCC pin. No timing resistors, capacitors, crystals, or configuration pins are needed. The device reproduces the input logic state at each tap after its fixed delay, with no initialization sequence or register programming required for DS1100LU-250+T functionality.

How does DS1100LU-250+T ensure matching between leading and trailing edges?

DS1100LU-250+T uses matched internal transistor sizing and symmetric layout to guarantee equal propagation delay for rising and falling edges. Per datasheet specifications, both tPLH and tPHL are subject to the same ±4ns tolerance at full temperature range, enabling accurate pulse-width preservation - a key capability confirmed in DS1100LU-250+T characterization across 1000+ units.

Can DS1100LU-250+T drive 74ACT logic loads directly?

Yes, DS1100LU-250+T can directly drive 74ACT inputs. Its 8mA sink and –1mA source capability exceeds the 74ACT input current requirements (±1µA DC, <10pF capacitance), and its 2.5ns max rise/fall time meets 74ACT timing budgets. No series termination or buffer stages are needed when interfacing DS1100LU-250+T with 74ACT devices under standard PCB trace lengths (<2 inches).

Is the µMAX package of DS1100LU-250+T compatible with standard reflow profiles?

Yes, DS1100LU-250+T's µMAX-8 package is qualified for both vapor-phase and IR reflow per JEDEC J-STD-020. Its lead(Pb)-free +T suffix confirms compliance with peak reflow temperatures up to +260°C for 10 seconds. Land pattern 90-0092 and thermal pad guidelines from Maxim's package documentation ensure reliable solder joint formation without voiding or tombstoning for DS1100LU-250+T.