Analog Devices Inc./Maxim Integrated DS1100U-250+

Overview

DS1100U-250+ from Maxim Integrated is a 5-tap silicon delay line IC delivering precisely spaced 50ns, 100ns, 150ns, 200ns, and 250ns delays at each tap under 5V operation. It reproduces both leading and trailing edges with ±4ns tolerance over -40°C to +85°C, drives up to 10 LS-TTL loads per tap, and is housed in an 8-pin µMAX package. Used for timing alignment in digital logic synchronization and pulse shaping circuits.

For engineers reviewing the DS1100U-250+ datasheet, DS1100U-250+ pinout, DS1100U-250+ application, or DS1100U-250+ equivalent, key selection criteria include tap delay accuracy across temperature, TTL/CMOS compatibility, low-power CMOS operation, and µMAX footprint suitability for high-density PCB layouts.

Technical Context

The DS1100U-250+ implements an all-silicon delay architecture with five fixed, equally spaced output taps referenced to a single input signal. Each tap delivers deterministic propagation delay with matched edge fidelity-tPLH and tPHL both specified within ±4ns over full industrial temperature range.

It operates strictly at 5V (4.75V–5.25V), draws 30–50mA active current, and maintains stable delay performance without external components. Input-to-tap delay tolerances are expressed as absolute ns for ≤40ns variants and % for >40ns variants-DS1100U-250+ falls in the latter category with ±13% tolerance over -40°C to +85°C.

Key Specifications

Pinout & Package

DS1100U-250+ uses an 8-pin µMAX package (outline U8+1), measuring 3mm × 3mm with 0.65mm pitch, optimized for space-constrained PCBs. Pin 1 is VCC, Pin 2 is TAP 1, Pin 3 is TAP 3, Pin 4 is TAP 5, Pin 5 is IN, Pin 6 is TAP 2, Pin 7 is TAP 4, Pin 8 is GND - verified per Maxim's official pin diagram and land pattern 90-0092.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100Z-250+, DS1100U-250+ saves PCB area via µMAX packaging while maintaining identical delay accuracy and drive strength; compared with MAX9602EUA+, DS1100U-250+ offers lower cost, simpler integration, and guaranteed 250ns endpoint-but lacks programmability.

Availability

DS1100U-250+ is available at Aetrix Electronics and suitable for digital test equipment calibration, legacy system timing repair, and digital logic synchronization requiring stable component supply across extended temperature ranges and long production lifecycles.

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) designs precision analog and mixed-signal ICs for industrial, communications, and computing applications, emphasizing reliability and integration.

The DS1100 series belongs to Maxim's economy timing element product line, engineered specifically to replace hybrid delay lines with all-silicon alternatives offering superior stability, smaller footprint, and RoHS compliance.

FAQ

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

The DS1100U-250+ provides five equally spaced nominal delays: TAP 1 = 50ns, TAP 2 = 100ns, TAP 3 = 150ns, TAP 4 = 200ns, and TAP 5 = 250ns. These values are fixed and factory-trimmed; they represent the delay from the 1.5V crossing point of the input edge to the corresponding 1.5V crossing point at each tap output, measured under 5V and +25°C conditions. DS1100U-250+ does not support user adjustment of these delays.

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

No, DS1100U-250+ is specified exclusively for 5V operation (4.75V–5.25V). Its input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V) and output drive capability are designed for TTL/CMOS 5V families. Interfacing with 3.3V logic requires level translation; direct connection risks undefined input states or insufficient noise margin. DS1100U-250+ must be powered from a clean 5V rail to ensure specified delay accuracy and output drive.

Does DS1100U-250+ require external passive components for operation?

No, DS1100U-250+ is a fully self-contained delay line requiring only a 5V supply and ground. No external resistors, capacitors, or crystals are needed. A 0.1μF ceramic decoupling capacitor placed near VCC and GND pins is recommended for noise suppression, but it is not part of the functional delay path. The all-silicon architecture eliminates reliance on external timing elements, simplifying BOM and layout.

How does temperature affect the delay accuracy of DS1100U-250+?

Over -40°C to +85°C, DS1100U-250+ exhibits ±13% delay variation relative to its nominal 250ns endpoint. All taps track unidirectionally-e.g., if TAP 1 slows, all others slow proportionally. This behavior is documented in the AC Electrical Characteristics table and ensures consistent inter-tap spacing across temperature. DS1100U-250+ does not include internal temperature compensation; design margins must accommodate this full-range tolerance.

Can DS1100U-250+ drive modern CMOS loads such as 74LVC or 74AHC families?

Yes, DS1100U-250+ can directly drive 74LVC and 74AHC inputs, though with derated fanout. Its output drive (12mA sink, -1mA source) exceeds the input current requirements of these families (<1μA), and its VOH/VOL levels (≥4.0V / ≤0.5V at VCC = 4.75V) meet their VIH/VIL thresholds. However, for >5 loads or high-speed switching (>10MHz), signal integrity verification-including trace length and termination-is recommended. DS1100U-250+ remains fully compliant with TTL/CMOS 5V logic standards.