Analog Devices Inc./Maxim Integrated DS1100U-250/T&R

Overview

DS1100U-250/T&R from Maxim Integrated is a 5-tap silicon delay line with nominal delays of 50ns, 100ns, 150ns, 200ns, and 250ns per tap, operating at 5V, specified over -40°C to +85°C, and packaged in an 8-pin µMAX surface-mount package. It reproduces both leading and trailing edges with equal precision and drives up to 10 74LS loads per tap for digital timing alignment in high-speed logic systems.

For engineers reviewing the DS1100U-250/T&R datasheet, DS1100U-250/T&R pinout, DS1100U-250/T&R application, or DS1100U-250/T&R equivalent, key selection criteria include tap delay accuracy (±4ns for ≤40ns delays, ±13% for >40ns), TTL/CMOS compatibility, low-power CMOS operation, and industrial temperature range support.

Technical Context

The DS1100U-250/T&R implements a monolithic all-silicon delay architecture with five fixed, equally spaced delay taps referenced to a single input signal. Each tap delivers deterministic propagation delay with matched leading- and trailing-edge timing, enabling precise skew control in synchronous logic paths.

It operates exclusively at 5V (4.75V–5.25V), draws 30–50mA active current, and maintains delay stability across voltage and temperature via unidirectional drift behavior-i.e., all taps shift consistently under varying conditions, preserving inter-tap spacing integrity.

Key Specifications

Pinout & Package

DS1100U-250/T&R is housed in an 8-pin µMAX® package (outline U8+1, land pattern 90-0092), measuring 3mm × 3mm × 0.8mm, with exposed pad for thermal enhancement and RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100Z-250/T&R and DS1000-250, DS1100U-250/T&R offers identical timing performance in a 3mm × 3mm µMAX package-enabling 60% smaller layout area than SO while supporting full industrial temperature operation and superior long-term reliability over hybrid alternatives.

Availability

DS1100U-250/T&R is available at Aetrix Electronics and suitable for digital test instrumentation, industrial PLC I/O timing, high-speed logic interface design, and embedded system debug requiring stable component supply and consistent delay performance across production batches.

Supply support for DS1100U-250/T&R 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, mixed-signal, and timing ICs for industrial, automotive, and communications applications, emphasizing reliability, integration, and manufacturability.

The DS1100 series belongs to Maxim's economy timing element product line, developed to replace hybrid delay lines with monolithic silicon solutions offering tighter delay tolerance, smaller footprint, and broader temperature qualification.

FAQ

What is the maximum input frequency supported by DS1100U-250/T&R?

The DS1100U-250/T&R is characterized for operation with input pulses having a minimum width of 500ns (1μs for -500 version) and period of 1μs (2μs for -500). While no absolute maximum frequency is specified, reliable operation is confirmed up to 1MHz under standard test conditions. Higher frequencies increase active current (ICC) and may reduce delay accuracy due to layout- and decoupling-sensitive effects, as noted in the datasheet.

Does DS1100U-250/T&R support both rising and falling edge delays with equal precision?

Yes, DS1100U-250/T&R is explicitly designed to reproduce both leading and trailing edges with equal precision. The datasheet confirms matched tPLH (rising delay) and tPHL (falling delay) tolerances across all taps and temperature ranges, ensuring duty-cycle integrity and symmetric timing behavior essential for clock distribution and feedback control.

What is the meaning of "/T&R" in DS1100U-250/T&R?

The "/T&R" suffix in DS1100U-250/T&R indicates tape-and-reel packaging - a standard carrier format for automated SMT placement. This version ships in EIA-481-compliant reels, enabling direct use in pick-and-place assembly lines without repackaging. It does not affect electrical performance or specifications relative to the bare part number DS1100U-250.

Can DS1100U-250/T&R drive standard TTL loads directly?

Yes, DS1100U-250/T&R can drive up to 10 standard 74LS loads per tap, as confirmed in the General Description. Its output drive capability (12mA sink, -1mA source) meets or exceeds the input current requirements of 74LS family devices, enabling direct interfacing without buffer amplifiers in most logic-level timing applications.

Is DS1100U-250/T&R RoHS-compliant?

Yes, DS1100U-250/T&R is RoHS-compliant. The "U" package code denotes the µMAX variant, and ordering information confirms that DS1100U-xxx/T&R parts are supplied in lead(Pb)-free/RoHS-compliant packaging, consistent with Maxim's standard environmental compliance for this product family.