Analog Devices Inc./Maxim Integrated DS1044R-25

Overview

DS1044R-25 from Dallas Semiconductor is a 4-channel, all-silicon, +5 V high-speed delay line with nominal 25 ns per-output propagation delay (tPLH/tPHL), ±2.0 ns initial tolerance, and ±1.5 ns additional variation over 0°C–70°C and 4.75 V–5.25 V supply. Each output drives up to 10 LS-TTL loads and preserves input signal symmetry via precise leading/trailing edge accuracy. It is used in digital timing alignment, clock deskewing, and pulse-width adjustment circuits.

For engineers reviewing the DS1044R-25 datasheet, DS1044R-25 pinout, DS1044R-25 application, or DS1044R-25 equivalent, this page delivers verified timing parameters, SOIC-14 package mapping, functional role in edge-aligned delay networks, and validated alternative delay lines for 25 ns fixed-delay implementations.

Technical Context

The DS1044R-25 implements four independent logic-buffered delay paths in a single monolithic silicon IC, each with identical 25 ns nominal delay and matched edge-to-edge performance. Its architecture ensures simultaneous tPLH and tPHL control within ±2.0 ns at 25°C, with no external components required.

It operates strictly at +5 V (4.75–5.25 V), supports 0°C–70°C industrial temperature range, and maintains delay stability across voltage and temperature-±1.5 ns additional deviation beyond initial tolerance-without trimming or calibration.

Key Specifications

Pinout & Package

DS1044R-25 uses a 14-pin SOIC (150 mil) package with standard footprint and lead pitch. Pin 1 is VCC; pins 2–4 and 6–7 are outputs (OUT1–OUT4); pins 9–12 are inputs (IN1–IN4); pins 5, 8, and 13 are NC; pin 14 is GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1044-25 (DIP), DS1044R-25 offers identical timing performance in a surface-mount package optimized for automated manufacturing; compared with MC100EP195DTG, it delivers simpler +5 V single-supply operation at the cost of higher jitter and lower speed ceiling-making DS1044R-25 ideal for industrial digital timing where robustness and ease of use outweigh extreme bandwidth needs.

Availability

DS1044R-25 is available at Aetrix Electronics and suitable for digital clock deskewing, high-speed data capture, and logic signal retiming requiring stable component supply and guaranteed 25 ns fixed delay performance.

Supply support for DS1044R-25 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

Dallas Semiconductor (now part of Maxim Integrated, then Analog Devices) specialized in precision timing, memory, and analog interface ICs for industrial and communications systems.

The DS1044 series was designed specifically for fixed-delay signal alignment in TTL/LS-TTL logic systems-prioritizing delay accuracy, edge fidelity, and multi-channel independence over programmability or wide voltage range.

FAQ

What is the operating temperature range for DS1044R-25?

The DS1044R-25 is specified for industrial operation from 0°C to +70°C. All timing parameters-including the 25 ns nominal delay, ±2.0 ns initial tolerance, and ±1.5 ns additional variation-are guaranteed across this full range when powered from 4.75 V to 5.25 V. Operation outside this range may cause parametric shift or reliability degradation.

Does DS1044R-25 support mixed-signal applications involving both analog and digital signals?

No-DS1044R-25 is a purely digital timing device intended for logic-level signal delay. Its inputs require TTL-compatible thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), and outputs swing rail-to-rail between 0.5 V and 4.0 V under load. It does not process analog waveforms, provide gain, or maintain signal integrity for non-digital signals.

Can DS1044R-25 be used with 3.3 V logic families?

No-DS1044R-25 requires a +5 V supply (4.75–5.25 V) and is not 3.3 V tolerant. Driving its inputs with 3.3 V logic may result in marginal VIH compliance (minimum VIH = 2.2 V), and its outputs exceed 3.3 V logic high thresholds, risking damage or contention if directly interfaced without level translation.

How many loads can each DS1044R-25 output drive reliably?

Each DS1044R-25 output is rated to drive up to 10 LS-TTL loads, defined as the capacitive and DC loading equivalent of one 74F04 input gate. This corresponds to ~12 mA sink current at VOL = 0.5 V and –1.0 mA source current at VOH = 4.0 V. Exceeding this load count degrades delay accuracy and edge rates.

Is DS1044R-25 pin-compatible with other DS1044 variants like DS1044R-10 or DS1044R-20?

Yes-DS1044R-25 shares identical SOIC-14 pinout, power/ground assignments, and I/O terminal mapping with all DS1044R-x variants. Only the internal delay value differs (10 ns, 20 ns, 25 ns, etc.). No PCB redesign is needed when swapping between DS1044R variants, provided timing margins accommodate the new delay value.