Analog Devices Inc./Maxim Integrated DS1035Z-20

Overview

DS1035Z-20 from Dallas Semiconductor (now Maxim Integrated) is a 3-channel, all-silicon, high-speed logic delay line operating at +5 V. It provides three independent buffered delays of precisely 20 ns each, with ±1.5 ns initial tolerance and ±1.5 ns additional variation over 0°C to 70°C and 4.75 V–5.25 V supply. It preserves input signal symmetry via leading/trailing edge precision and drives up to 10 LS TTL loads - used in digital timing alignment, clock deskewing, and pulse width adjustment in test equipment and industrial controllers.

For engineers reviewing the DS1035Z-20 datasheet, DS1035Z-20 pinout, DS1035Z-20 application, or DS1035Z-20 equivalent, key selection criteria include guaranteed 20 ns per-output delay accuracy, 8-pin SOIC (150-mil) package compatibility, TTL/LS-load drive capability, temperature/voltage stability, and absence of external passive components required for delay generation.

Technical Context

The DS1035Z-20 implements three independent, identically trimmed silicon delay paths with buffered outputs, eliminating propagation skew between channels. Each path delivers matched tPLH/tPHL = 20 ns under nominal conditions (25°C, 5.0 V), with edge-aligned precision maintained across both rising and falling edges.

It operates within a commercial temperature range (0°C to 70°C) and requires no external timing elements - unlike RC or crystal-based solutions - making it suitable for deterministic, low-jitter digital timing functions where repeatability and board-level integration are critical.

Key Specifications

Pinout & Package

DS1035Z-20 is housed in an 8-pin SOIC package (150-mil width), pin-compatible with industry-standard 8-pin DIP footprints via adapter or layout adaptation. The package supports vapor phase, IR, and wave soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-channel fixed-delay line applications.

Compared with DS1035M-20 and MAX962-20, the DS1035Z-20 uniquely delivers three matched 20 ns delays in a surface-mount SOIC package with LS-TTL drive strength - making it irreplaceable for compact, multi-signal timing alignment where channel correlation and board space are critical.

Availability

DS1035Z-20 is available at Aetrix Electronics and suitable for digital test equipment, industrial PLC timing modules, and high-speed data acquisition systems requiring stable component supply and long-term obsolescence management.

Supply support for DS1035Z-20 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 (a subsidiary of Analog Devices), specializes in precision timing, memory, and mixed-signal ICs for industrial, communications, and computing applications.

The DS1035 series was designed specifically as a high-speed, all-silicon replacement for discrete RC delay networks and older hybrid delay lines - targeting applications demanding repeatable, temperature-stable, multi-channel digital timing without external components.

FAQ

What is the guaranteed delay accuracy of DS1035Z-20 over its full operating temperature range?

The DS1035Z-20 guarantees a total delay tolerance of ±1.5 ns initial plus ±1.5 ns over temperature (0°C to 70°C) and supply voltage (4.75 V–5.25 V), resulting in a worst-case deviation of ±3.0 ns from nominal 20 ns per output. This applies to both tPLH and tPHL measurements at the 1.5 V switching threshold, as verified under standardized test conditions per the official datasheet.

Does DS1035Z-20 require external decoupling capacitors, and if so, what value is recommended?

Yes, DS1035Z-20 requires local VCC decoupling to maintain delay stability and minimize noise-induced jitter. A 0.1 µF ceramic capacitor placed as close as possible between Pin 5 (VCC) and Pin 4 (GND) is specified in the datasheet. Additional bulk capacitance (e.g., 4.7 µF tantalum) may be added nearby for systems with high-current transients, but the 0.1 µF is mandatory for DS1035Z-20 functional compliance.

Can DS1035Z-20 drive standard 74LS logic inputs directly?

Yes, DS1035Z-20 is explicitly rated to drive up to 10 LS-TTL loads per output, meeting the VIH/VIL thresholds and current requirements of 74LS-series devices. Its IOL = 12 mA and IOH = –1.0 mA, combined with output rise/fall times of 2.0–2.5 ns, ensure reliable interfacing with 74LS inputs without external buffers or level-shifting circuitry.

Is DS1035Z-20 pin-compatible with DS1035Z-15 or other variants in the same family?

Yes, all DS1035Z-x variants (including DS1035Z-15, DS1035Z-20, DS1035Z-25) share identical 8-pin SOIC (150-mil) pinouts, electrical interfaces, and DC/AC characteristics except for nominal delay value and associated tolerance bands. No PCB redesign is needed when substituting between DS1035Z variants - only timing validation is required for the new delay value.

What is the maximum input frequency supported by DS1035Z-20 for reliable delay operation?

DS1035Z-20 does not specify a maximum input frequency, but its AC performance supports reliable operation with input pulses having ≥100 ns width (per datasheet note: tWI ≥ 100% of tap delay). Given its 20 ns delay and 2.0–2.5 ns rise/fall times, it reliably handles repetitive signals up to ~5 MHz (200 ns period) while preserving edge fidelity - higher frequencies may be used if pulse width and duty cycle remain within specification limits.