Analog Devices Inc./Maxim Integrated DS1100U-20

Overview

DS1100U-20 from Maxim Integrated is a 5-tap silicon delay line in an 8-pin µMAX package, delivering precise fixed delays of 4ns, 8ns, 12ns, 16ns, and 20ns per tap at 5V supply. It reproduces both leading and trailing edges with ±4ns tolerance over –40°C to +85°C, drives up to 10 LS-TTL loads per tap, and serves in digital timing alignment, pulse shaping, and clock deskew applications.

For engineers reviewing the DS1100U-20 datasheet, DS1100U-20 pinout, DS1100U-20 application, or DS1100U-20 equivalent, key selection considerations include tap delay accuracy across temperature, TTL/CMOS compatibility, low-power CMOS operation, and µMAX footprint constraints for high-density PCB layouts.

Technical Context

The DS1100U-20 implements an all-silicon delay architecture with five equally spaced, monotonic output taps-ensuring unidirectional delay variation across voltage (4.75V–5.25V) and temperature (–40°C to +85°C). Each tap maintains matched tPLH/tPHL characteristics with ≤±4ns absolute tolerance for 20ns-range delays.

It operates as a passive, non-retriggerable timing element: input pulses propagate through internal delay stages without regeneration or buffering, preserving edge fidelity. The device requires no external configuration, clock, or control signals-only VCC, GND, and a single logic-level input.

Key Specifications

Pinout & Package

DS1100U-20 is housed in an 8-pin µMAX package (outline U8+1), measuring 3.0mm × 3.0mm × 0.8mm with gull-wing leads and RoHS-compliant finish. The package supports vapor-phase, IR, and wave soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100U-20, DS1000-20 lacks industrial temperature support and exhibits looser delay stability, while MAX9012EUA+ trades precision and tap determinism for configurability-making DS1100U-20 the optimal choice for fixed, multi-point, temperature-stable delay in space-constrained designs.

Availability

DS1100U-20 is available at Aetrix Electronics and suitable for digital timing alignment, PWM dead-time generation, logic glitch filtering, and test equipment pulse shaping requiring stable component supply and guaranteed long-term availability.

Supply support for DS1100U-20 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) is a semiconductor company specializing in analog, mixed-signal, and high-reliability timing solutions for industrial, communications, and computing markets.

The DS1100 series belongs to Maxim's economy timing element product line, designed specifically for cost-sensitive, high-volume applications needing deterministic, low-power, fixed-delay performance without programmability overhead.

FAQ

What is the nominal delay per tap for DS1100U-20?

The DS1100U-20 provides five fixed delays: TAP1 = 4ns, TAP2 = 8ns, TAP3 = 12ns, TAP4 = 16ns, and TAP5 = 20ns. These values are factory-trimmed and specified at +25°C and 5V, with monotonic variation across temperature and voltage. DS1100U-20 does not support user-adjustable delays-the entire delay profile is hard-coded into the silicon.

Is DS1100U-20 compatible with 3.3V logic systems?

No, DS1100U-20 is specified only for 5V operation (4.75V–5.25V). Its input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V) and output drive levels are optimized for TTL/CMOS 5V families. Interfacing directly with 3.3V logic requires level translation; DS1100U-20 itself does not support dual-supply or 3.3V operation.

Can DS1100U-20 drive multiple 74LS inputs simultaneously?

Yes-each tap of DS1100U-20 can drive up to 10 LS-TTL loads (i.e., 10 × 74LS inputs) under worst-case conditions (–40°C, VCC = 4.75V). This is verified by its IOL = 12mA and IOH = –1mA specifications. For heavier loads or longer traces, buffer amplification is recommended to maintain timing accuracy.

Does DS1100U-20 require external components for basic operation?

No external components are required for DS1100U-20 functionality. However, a 0.1μF ceramic decoupling capacitor between VCC and GND, placed within 2mm of pins 1 and 8, is mandatory for stable operation and noise immunity. No pull-ups, resistors, or timing capacitors are needed-DS1100U-20 operates as a self-contained delay element.

What is the lead-free status of DS1100U-20?

The DS1100U-20 is offered in RoHS-compliant, lead(Pb)-free packaging. The "+" suffix (e.g., DS1100U-20+) explicitly denotes lead-free construction per JEDEC J-STD-609. Standard DS1100U-20 parts without the "+" may contain lead; always verify the full orderable part number and packaging code with your distributor or Maxim/Analog Devices documentation.