Analog Devices Inc./Maxim Integrated DS1100U-50

Overview

DS1100U-50 from Maxim Integrated is a 5-tap silicon delay line IC delivering precisely spaced 10ns, 20ns, 30ns, 40ns, and 50ns delays at 5V supply, with ±4ns tolerance over –40°C to +85°C, TTL/CMOS-compatible outputs, and ability to drive up to 10 × 74LS loads - used in digital timing alignment, pulse shaping, and clock deskew circuits.

For engineers reviewing the DS1100U-50 datasheet, DS1100U-50 pinout, DS1100U-50 application, or DS1100U-50 equivalent, key selection considerations include tap delay accuracy across temperature, edge fidelity for both rising/falling transitions, VCC = 5V operation, µMAX-8 package footprint, and compatibility with legacy DS1000-based designs requiring discrete delay staging.

Technical Context

The DS1100U-50 implements an all-silicon delay architecture with five fixed, equally spaced output taps derived from a single input signal; each tap reproduces both leading and trailing edges with matched propagation delay characteristics. Delay values are factory-trimmed and specified with ±4ns absolute tolerance over full industrial temperature range (–40°C to +85°C) at 5V.

It operates exclusively at 5V (4.75V–5.25V), draws ≤50mA active current, and features TTL/CMOS-compatible input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V) and output drive capability meeting 74LS load requirements. Input capacitance is 5–10pF; power-up time is 200μs.

Key Specifications

Pinout & Package

DS1100U-50 is housed in an 8-pin µMAX® package (U8+1 outline, 3mm × 3mm body, 0.65mm pitch), pin-compatible with industry-standard SO-8 but with reduced PCB area. The package is RoHS-compliant (lead-free) and 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 DS1000-50 and MAX9601EUA+, the DS1100U-50 offers superior thermal stability, smaller footprint, and lower power in a fixed-delay, plug-and-play solution - ideal for cost-sensitive, volume production timing alignment where programmability is unnecessary.

Availability

DS1100U-50 is available at Aetrix Electronics and suitable for digital test equipment, industrial motion controllers, communication protocol timing, and embedded system calibration requiring stable component supply and long-term manufacturability.

Supply support for DS1100U-50 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 U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability timing solutions for industrial, automotive, and communications markets.

The DS1100 series belongs to Maxim's economy timing element product line, designed specifically to replace hybrid delay lines with robust, low-cost, all-silicon alternatives for fixed-interval digital signal staging.

FAQ

What is the exact delay value for each tap of the DS1100U-50?

The DS1100U-50 provides five fixed, equally spaced delays: TAP1 = 10ns, TAP2 = 20ns, TAP3 = 30ns, TAP4 = 40ns, and TAP5 = 50ns, measured at the 1.5V crossing point of input and output edges under VCC = 5.0V and TA = –40°C to +85°C. These values are factory-trimmed and guaranteed within ±4ns absolute tolerance across the full industrial temperature range.

Is the DS1100U-50 compatible with 3.3V logic systems?

No, the DS1100U-50 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. Direct interfacing with 3.3V logic requires level translation; the DS1100U-50 does not support dual-supply or 3.3V-only operation.

Does the DS1100U-50 require external components for basic operation?

No, the DS1100U-50 operates as a standalone delay element with only two external requirements: a 0.1μF ceramic decoupling capacitor between VCC and GND, and proper PCB grounding. No resistors, capacitors, or clock sources are needed - the device reproduces input logic states at each tap with fixed delay, independent of frequency or waveform shape.

How does the DS1100U-50 handle rising vs. falling edges?

The DS1100U-50 is engineered for equal precision on both edges: tPLH (rising delay) and tPHL (falling delay) are matched within specification limits (±4ns over –40°C to +85°C). This ensures preserved pulse width across all taps - a key differentiator from asymmetric delay elements - making it suitable for applications where duty cycle integrity is critical.

What is the maximum load the DS1100U-50 can drive per tap?

Each tap of the DS1100U-50 is rated to drive up to 10 × 74LS logic inputs, corresponding to a DC load of approximately 800μA per tap at VOH = 4.0V and VOL = 0.5V. This drive strength is verified under VCC = 4.75V minimum and supports direct connection to standard TTL/CMOS loads without buffer amplification.