Analog Devices Inc./Maxim Integrated DS1100LU-75+

Overview

DS1100LU-75+ from Maxim Integrated is a 3.3V, 5-tap silicon delay line in an 8-pin µMAX package, delivering nominal delays of 15ns, 30ns, 45ns, 60ns, and 75ns across taps 1–5. It reproduces both leading and trailing edges with equal precision, supports TTL/CMOS logic levels, and drives up to 10 74LS loads per tap. Used in high-speed timing alignment, clock deskewing, and pulse-width adjustment circuits.

For engineers reviewing the DS1100LU-75+ datasheet, DS1100LU-75+ pinout, DS1100LU-75+ application, or DS1100LU-75+ equivalent, key selection criteria include tap delay accuracy over -40°C to +85°C, input-to-tap delay tolerance (±4ns for TAP1–TAP3 at full temperature range), 3.3V supply compatibility, and µMAX footprint constraints for space-constrained PCBs.

Technical Context

The DS1100LU-75+ implements a fully silicon-based delay architecture-no hybrid or ceramic components-with five fixed, equally spaced delay taps derived from a single monolithic CMOS delay chain. Each tap replicates the input logic state after its specified delay, preserving edge fidelity without distortion or duty-cycle shift.

It operates strictly within 3.0V–3.6V VCC, with guaranteed performance across industrial temperature (-40°C to +85°C). Input-to-tap delay tolerances are asymmetrically tightened for TAP1–TAP3 (±2ns at +25°C, ±4ns over full range) due to the "-75" variant's enhanced specification, while TAP4 and TAP5 meet standard DS1100L tolerances.

Key Specifications

Pinout & Package

DS1100LU-75+ uses the 8-pin µMAX package (U8+1 outline, 3mm × 3mm, 0.65mm pitch), optimized for high-density PCB layouts. Pin 1 = IN, Pin 2 = TAP2, Pin 3 = TAP4, Pin 4 = GND, Pin 5 = TAP5, Pin 6 = TAP3, Pin 7 = TAP1, Pin 8 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100LZ-75+, the DS1100LU-75+ saves 60% board area and improves high-frequency signal integrity; compared with MC100EP195DG, it offers five deterministic taps at lower cost and simpler single-ended interfacing, but trades off jitter performance for broad logic compatibility.

Availability

DS1100LU-75+ is available at Aetrix Electronics and suitable for high-speed logic timing alignment, serial data pulse width adjustment, and industrial clock deskewing requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support.

Supply support for DS1100LU-75+ 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 a low-cost, high-reliability silicon replacement for hybrid delay lines - targeting timing-critical digital systems needing predictable, temperature-stable propagation delays without programmability overhead.

FAQ

What is the nominal delay value for each tap of the DS1100LU-75+?

The DS1100LU-75+ provides five fixed, equally spaced delays: TAP1 = 15ns, TAP2 = 30ns, TAP3 = 45ns, TAP4 = 60ns, and TAP5 = 75ns. These values are specified at +25°C and VCC = 3.3V, with monotonic variation across temperature and voltage. The "-75" suffix confirms the longest tap delay is 75ns, and all intermediate taps scale linearly from that value.

Does the DS1100LU-75+ support both rising and falling edge delays with equal accuracy?

Yes, the DS1100LU-75+ is explicitly designed to reproduce both leading and trailing edges with equal precision. Its all-silicon architecture ensures matched tPLH (rising edge delay) and tPHL (falling edge delay) across all five taps, preserving pulse width integrity - a key requirement for clock strobing and data eye alignment applications.

What is the maximum load drive capability per tap on the DS1100LU-75+?

Each tap of the DS1100LU-75+ can drive up to 10 standard 74LS logic inputs, corresponding to an output sink current of 8mA and source current of -1mA under minimum VCC (3.0V). This allows direct interfacing with legacy TTL and CMOS families without external buffering in most digital timing applications.

Is the DS1100LU-75+ compatible with lead-free reflow processes?

Yes, the DS1100LU-75+ carries the "+" suffix indicating RoHS-compliant, lead-free packaging. It is qualified for vapor-phase and infrared reflow, with a maximum peak temperature of +260°C for lead-free soldering - fully compliant with IPC-J-STD-020D moisture sensitivity and thermal profile requirements.

How does the DS1100LU-75+ differ from the standard DS1100L-75+ in terms of delay tolerance?

The DS1100LU-75+ shares identical delay values and core specifications with the DS1100L-75+, but its "-75" variant applies an additional ±2ns tolerance tightening to TAP1–TAP3 delay parameters across the full -40°C to +85°C range. This results in ±4ns total tolerance for those taps - tighter than the base DS1100L family - while TAP4 and TAP5 meet standard DS1100L tolerances.