Analog Devices Inc./Maxim Integrated DS1100U-35+

Overview

DS1100U-35+ from Maxim Integrated is a 5-tap silicon delay line in µMAX-8 package, delivering precisely spaced 7ns, 14ns, 21ns, 28ns, and 35ns delays at 5V operation. It reproduces both leading and trailing edges with ±4ns tolerance over –40°C to +85°C and drives up to 10 LS-TTL loads per tap. Used in digital timing alignment, clock skew correction, and pulse-width adjustment circuits.

For engineers reviewing the DS1100U-35+ datasheet, DS1100U-35+ pinout, DS1100U-35+ application, or DS1100U-35+ equivalent, key selection criteria include tap delay accuracy across temperature, TTL/CMOS compatibility, low-power CMOS operation, and µMAX-8 footprint suitability for high-density PCBs.

Technical Context

The DS1100U-35+ implements an all-silicon delay architecture with five fixed, equally spaced output taps referenced to a single input. Each tap delivers deterministic propagation delay with matched tPLH/tPHL characteristics and unidirectional drift under voltage or temperature variation.

It operates exclusively at 5V (4.75V–5.25V), supports 1MHz input frequency, and maintains edge fidelity via 1.5V-level timing measurement points. Input pulse width must be ≥20% of Tap 5 delay (≥7ns), and power-up time is ≤200μs.

Key Specifications

Pinout & Package

DS1100U-35+ uses the 8-pin µMAX package (U8+1 outline, 3mm × 3mm body, 0.65mm pitch), optimized for space-constrained PCB layouts and compatible with vapor-phase, IR, and wave soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100Z-35+, the DS1100U-35+ saves 64% PCB area with identical timing performance; versus DS1000S-35+, it delivers 2.5× tighter delay tolerance and guaranteed industrial qualification-making it optimal for compact, mission-critical timing.

Availability

DS1100U-35+ is available at Aetrix Electronics and suitable for digital timing alignment, clock deskewing, and pulse-width modulation applications requiring stable component supply and RoHS-compliant packaging.

Supply support for DS1100U-35+ 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.

The DS1100 series belongs to Maxim's economy timing element product line, engineered to replace hybrid delay lines with fully silicon-based, surface-mount alternatives offering superior reliability and smaller footprints.

FAQ

What is the nominal delay value for each tap of the DS1100U-35+?

The DS1100U-35+ provides five fixed, equally spaced delays: TAP1 = 7ns, TAP2 = 14ns, TAP3 = 21ns, TAP4 = 28ns, and TAP5 = 35ns. These values are specified at +25°C and 5V, with ±4ns absolute tolerance over the full –40°C to +85°C industrial temperature range. All delays track unidirectionally with temperature and voltage changes, ensuring consistent relative spacing across operating conditions. DS1100U-35+ does not support programmable or adjustable delay values.

Is the DS1100U-35+ compatible with 3.3V logic systems?

No, the DS1100U-35+ is designed strictly for 5V operation (4.75V–5.25V). Its input thresholds (VIH = 2.2V min, VIL = 0.8V max) and output drive levels are specified only at 5V, and DC characteristics such as ICC and IOL are validated exclusively within that supply range. Interfacing DS1100U-35+ with 3.3V logic requires level-shifting circuitry; direct connection may result in undefined logic states or degraded timing accuracy. DS1100U-35+ is not 3.3V tolerant.

Can the DS1100U-35+ reproduce both rising and falling edges with equal accuracy?

Yes, the DS1100U-35+ is explicitly characterized for both leading-edge (tPLH) and trailing-edge (tPHL) delay accuracy, with identical ±4ns tolerance over –40°C to +85°C. This dual-edge fidelity ensures preserved duty cycle in regenerated signals and enables reliable use in applications like pulse shaping and glitch filtering where waveform symmetry matters. The DS1100U-35+ achieves this via matched internal propagation paths-not through external compensation.

What is the maximum input frequency supported by the DS1100U-35+?

The DS1100U-35+ is characterized for operation up to 1MHz input frequency, with active current (ICC) specified at that rate. While higher frequencies may function, delay accuracy degrades near maximum frequency due to layout sensitivity and decoupling limitations. Input pulse width must remain ≥20% of Tap 5 delay (≥7ns), and period must exceed twice that width. For robust performance, DS1100U-35+ should be used below 500kHz in production designs unless validated per application.

Does the DS1100U-35+ require external decoupling capacitors?

Yes, DS1100U-35+ requires a 0.1μF ceramic decoupling capacitor placed within 10mm of the VCC and GND pins. This is critical to maintain delay stability and suppress supply-induced jitter, especially under fast-switching load conditions. The device draws pulsed current during output transitions, and inadequate local decoupling causes measurable delay variation (>1ns) and increased ICC. No internal bypassing is provided-DS1100U-35+ relies entirely on proper PCB-level decoupling for specification compliance.