Analog Devices Inc./Maxim Integrated DS1100U-40

Overview

DS1100U-40 from Maxim Integrated is a 5-tap silicon delay line IC providing fixed, equally spaced delays of 8ns, 16ns, 24ns, 32ns, and 40ns at each tap, operating at 5V with ±4ns delay tolerance over –40°C to +85°C, and capable of driving 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-40 datasheet, DS1100U-40 pinout, DS1100U-40 application, or DS1100U-40 equivalent, key selection considerations include tap delay precision across temperature, TTL/CMOS compatibility, µMAX package footprint constraints, and input-to-output edge fidelity for synchronous logic interfacing.

Technical Context

The DS1100U-40 implements an all-silicon delay architecture with five discrete, monotonic output taps-each reproducing both leading and trailing edges with equal accuracy. Delay values are factory-trimmed and specified at 1.5V switching threshold under 5V ±5% supply.

It operates across industrial temperature range (–40°C to +85°C) with stable delay tolerance: ±4ns for ≤40ns delays, and ±13% for >40ns variants. Input pulse width must exceed 20ns, and power-up time is 200μs.

Key Specifications

Pinout & Package

DS1100U-40 is housed in an 8-pin µMAX® package (U8+1), 3mm × 3mm, 0.65mm pitch, RoHS-compliant, vapor-phase/reflow solderable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100Z-40 and MC100EP195DTG, the DS1100U-40 uniquely balances compact µMAX packaging, industrial-grade delay stability, and direct 5V logic interoperability - making it optimal for cost-sensitive, space-constrained embedded timing where ECL complexity or SO-8 footprint is impractical.

Availability

DS1100U-40 is available at Aetrix Electronics and suitable for digital test equipment, industrial PLC timing modules, legacy system signal conditioning, and high-speed logic prototyping requiring stable component supply and guaranteed long-term sourcing.

Supply support for DS1100U-40 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, automotive, and communications applications.

The DS1100U-40 belongs to Maxim's economy timing element family - engineered for fixed-delay signal alignment in cost-sensitive, high-volume 5V digital systems where hybrid delay lines were previously used.

FAQ

What is the nominal delay value for each tap of the DS1100U-40?

The DS1100U-40 provides five equally spaced delays: TAP 1 = 8ns, TAP 2 = 16ns, TAP 3 = 24ns, TAP 4 = 32ns, and TAP 5 = 40ns. These values are factory-trimmed and specified at +25°C and 5V, with tolerance tightening to ±4ns across the full –40°C to +85°C industrial range. Each tap reproduces both rising and falling edges with matched delay.

Is the DS1100U-40 compatible with TTL and CMOS logic families?

Yes, the DS1100U-40 is fully TTL/CMOS-compatible: its input accepts VIH ≥ 2.2V and VIL ≤ 0.8V, and outputs drive 12mA low / –1mA high - sufficient for direct interfacing with 74LS, 74F, and standard 5V CMOS devices. No level-shifting circuitry is needed when used with these families.

What is the maximum load each tap of the DS1100U-40 can drive?

Each tap of the DS1100U-40 can drive up to 10 LS-TTL loads, defined as 10× the input capacitance and current requirements of a standard 74LS gate. This corresponds to ~12mA sink capability at VOL = 0.5V and –1mA source at VOH = 4V under minimum VCC (4.75V). Exceeding this may degrade delay accuracy and edge fidelity.

Does the DS1100U-40 require external components for stable operation?

The DS1100U-40 requires only a 0.1μF ceramic decoupling capacitor placed as close as possible between VCC (Pin 1) and GND (Pin 8). No pull-up/pull-down resistors, termination networks, or timing calibration components are needed. Its all-silicon architecture eliminates external tuning elements required by hybrid delay solutions.

How does the DS1100U-40 differ from the DS1000 series?

The DS1100U-40 is a silicon-based improvement over the older DS1000 hybrid delay lines: it offers superior delay stability over temperature/voltage, lower cost, smaller µMAX footprint, and enhanced reliability due to absence of wire-bonded ceramic substrates. Unlike DS1000, DS1100U-40 guarantees matched leading/trailing edge delays and supports industrial temperature range without derating.