Analog Devices Inc./Maxim Integrated DS1044R-10

Overview

DS1044R-10 from Dallas Semiconductor is a 4-channel, +5 V silicon delay line IC with nominal 10 ns per-output propagation delay (tPLH/tPHL), ±1.5 ns initial tolerance, and ±1.0 ns additional variation over 0°C–70°C and 4.75 V–5.25 V supply. It delivers four independent buffered outputs, each capable of driving 10 LS TTL loads, and preserves input signal symmetry via precise leading/trailing edge timing-used in high-speed digital timing alignment, clock skew correction, and pulse-width stabilization.

For engineers reviewing the DS1044R-10 datasheet, DS1044R-10 pinout, DS1044R-10 application, or DS1044R-10 equivalent, key selection criteria include guaranteed 10 ns delay accuracy, 14-pin SOIC (150 mil) package compatibility, dual-edge precision, temperature/voltage stability, and TTL/LS-load drive capability in synchronous logic systems.

Technical Context

The DS1044R-10 implements four independent, fully buffered delay paths within a single monolithic silicon die, each with matched tPLH and tPHL characteristics measured at the 1.5 V switching threshold. Its all-silicon architecture eliminates quartz or RC-based drift, enabling stable operation across voltage (±5% of 5 V) and temperature (0°C to 70°C).

Each output features symmetrical rise/fall times (2.0–2.5 ns) and supports full TTL fanout (10 LS loads). The device requires no external components, operates with 45 mA typical active current, and achieves power-up stabilization within 100 ms-making it suitable for deterministic timing in high-reliability digital control and test instrumentation.

Key Specifications

Pinout & Package

DS1044R-10 is housed in a 14-pin SOIC package (150 mil width), RoHS-compliant and compatible with vapor phase, IR, and wave soldering processes. Pin 1 is VCC; pins 2–5 are NC; pins 6–9 are OUT1–OUT4; pins 10–13 are IN1–IN4; pin 14 is GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel fixed-delay line applications.

Compared with DS1044-10 (DIP), DS1044R-10 provides identical timing performance in surface-mount form for automated production; compared with MAX962, DS1044R-10 delivers superior delay accuracy (±1.5 ns vs. ±2.5 ns) and lower supply current, making it optimal for cost-sensitive, commercial-temperature digital timing applications.

Availability

DS1044R-10 is available at Aetrix Electronics and suitable for high-speed logic skew compensation, digital test instrumentation, and programmable pulse width stabilization requiring stable component supply, long-term obsolescence management, and RoHS-compliant manufacturing support.

Supply support for DS1044R-10 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) specialized in precision analog, timing, and mixed-signal ICs for industrial, computing, and communications markets.

The DS1044R-10 belongs to the DS1044 series of silicon delay lines-designed specifically to replace unreliable RC networks and crystal-based delays in high-speed digital systems demanding deterministic, temperature-stable timing.

FAQ

What is the guaranteed delay accuracy of DS1044R-10 over its full operating temperature and voltage range?

The DS1044R-10 guarantees ±1.0 ns additional delay variation over 0°C to 70°C and 4.75 V to 5.25 V supply, on top of its ±1.5 ns initial tolerance at +25°C and 5.0 V. This yields a total worst-case delay window of 10 ns ±2.5 ns across all specified conditions-verified by automated time-interval measurement under IEEE 488-controlled test setups.

Can DS1044R-10 drive standard TTL logic directly without external buffers?

Yes, DS1044R-10 can drive up to 10 LS TTL loads per output, meeting standard TTL voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and delivering 12 mA sink current at VOL = 0.5 V. Its –1.0 mA source capability also satisfies TTL VOH requirements, eliminating need for external level-shifting or buffering in most legacy and modern TTL-compatible designs.

Is DS1044R-10 pin-compatible with DS1044-10?

Yes, DS1044R-10 and DS1044-10 share identical pin functions and numbering: both use 14-pin configurations with VCC at pin 1, GND at pin 14, IN1–IN4 at pins 10–13, OUT1–OUT4 at pins 6–9, and NC at pins 2–5. Only the package differs-SOIC vs. DIP-so PCB layout must match the selected variant.

Does DS1044R-10 preserve input signal duty cycle and edge symmetry?

Yes, DS1044R-10 maintains input symmetry through matched tPLH and tPHL characteristics-both specified identically in Table 1 and measured at the 1.5 V switching threshold. Its all-silicon buffered design ensures <0.2 ns edge skew between rising and falling delays, preserving duty cycle integrity critical for clock distribution and sampling applications.

What is the maximum recommended input pulse width for DS1044R-10?

The DS1044R-10 datasheet specifies that input pulse width (tWI) must be at least 100% of the tap delay (i.e., ≥10 ns for DS1044R-10) to ensure accurate delay measurement and stable output behavior. Shorter pulses may cause incomplete switching or metastability; for robust operation, use ≥20 ns pulses with <3 ns rise/fall times and 500 ns minimum period.