Analog Devices Inc./Maxim Integrated DS1100U-250

Overview

DS1100U-250 from Maxim Integrated is a 5-tap silicon delay line providing precisely spaced delays of 50ns, 100ns, 150ns, 200ns, and 250ns 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-250 datasheet, DS1100U-250 pinout, DS1100U-250 application, or DS1100U-250 equivalent, key selection considerations include tap spacing accuracy, industrial temperature stability, TTL/CMOS compatibility, low-power CMOS operation, and µMAX package footprint constraints.

Technical Context

The DS1100U-250 implements an all-silicon delay architecture with fixed, monotonic delay progression across five equally spaced taps - all taps track identically with temperature and supply voltage changes, ensuring consistent relative timing. Input-to-output propagation delay (tPLH/tPHL) is measured at the 1.5V logic threshold for both rising and falling edges.

It supports full 5V TTL/CMOS logic interfacing with VIH ≥ 2.2V and VIL ≤ 0.8V, draws ≤50mA active current at 1MHz, and maintains edge fidelity for both leading and trailing edges without duty-cycle distortion - critical for pulse shaping and synchronous signal deskewing.

Key Specifications

Pinout & Package

DS1100U-250 is housed in an 8-pin µMAX® package (U8+1 outline), measuring 3mm × 3mm × 0.8mm with exposed pad, optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1000-250 and MC100EP195MNR4G, DS1100U-250 delivers optimal balance of precision, industrial reliability, and 5V logic compatibility - making it the preferred choice for embedded control, instrumentation, and industrial interface timing where simplicity and long-term supply stability matter.

Availability

DS1100U-250 is available at Aetrix Electronics and suitable for digital timing alignment, clock deskewing, and pulse-width adjustment applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for DS1100U-250 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 was designed as a low-cost, high-stability silicon replacement for hybrid delay lines - targeting board-level timing correction in space- and power-constrained embedded systems.

FAQ

What is the nominal delay value for each tap of the DS1100U-250?

The DS1100U-250 provides five equally spaced delays: TAP 1 = 50ns, TAP 2 = 100ns, TAP 3 = 150ns, TAP 4 = 200ns, and TAP 5 = 250ns. These values are specified at +25°C and 5V, with monotonic tracking across temperature and supply voltage - meaning all taps slow or speed together, preserving relative spacing. The DS1100U-250 datasheet confirms this in Table 1 and AC Electrical Characteristics.

Is the DS1100U-250 compatible with 3.3V logic systems?

No, the DS1100U-250 is specified for 5V operation only (VCC = 4.75V to 5.25V) and requires TTL/CMOS-compatible input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V). Driving it directly from a 3.3V logic source may result in marginal or unreliable switching. Level-shifting circuitry is required for interoperability with 3.3V systems. This limitation is explicitly stated in the DC Electrical Characteristics section of the DS1100U-250 datasheet.

Does the DS1100U-250 support both rising and falling edge delay accuracy?

Yes, the DS1100U-250 is engineered for equal precision on both leading and trailing edges - confirmed in the General Description and AC Electrical Characteristics sections. Propagation delays tPLH (rising) and tPHL (falling) are separately specified and matched within ±4ns over -40°C to +85°C. This ensures pulse width integrity and makes DS1100U-250 suitable for applications like clock stretching and non-distorting signal delay.

What is the maximum capacitive load the DS1100U-250 can drive per tap?

The DS1100U-250 is rated to drive up to 10 LS-TTL loads per tap, equivalent to ~20pF total load capacitance with appropriate termination. Its output drive strength is specified as IOL = 12mA (sink) and IOH = -1mA (source) under worst-case conditions. Exceeding this load may degrade delay accuracy and edge rate - verified in the DC Electrical Characteristics table and Test Conditions section of the DS1100U-250 datasheet.

How does the DS1100U-250 differ from the DS1100Z-250 variant?

The DS1100U-250 uses the 8-pin µMAX package (3mm × 3mm), while DS1100Z-250 uses the 8-pin SO (150-mil) package (larger footprint, 5mm × 6mm). Both share identical electrical specifications, timing performance, and temperature rating (-40°C to +85°C). Pinout is identical, but land patterns and thermal characteristics differ - DS1100U-250 offers higher board density and improved thermal dissipation via its exposed pad. This distinction is documented in the Ordering Information and Package Information sections.