Analog Devices Inc./Maxim Integrated DS1040Z-B50+

Overview

DS1040Z-B50+ from Maxim Integrated (formerly Dallas Semiconductor) is a rising-edge-triggered, CMOS-based programmable one-shot pulse generator with five precise pulse widths (30 ns to 50 ns in 5 ns increments), ±5% or ±2 ns width tolerance, and dual non-inverted/inverted outputs. It operates at 5 V, drives up to five 74LS loads, and is used in laser power control for magneto-optical disk read/write systems.

For engineers reviewing the DS1040Z-B50+ datasheet, DS1040Z-B50+ pinout, DS1040Z-B50+ application, or DS1040Z-B50+ equivalent, key selection considerations include programmable width resolution (5 ns steps), intrinsic delay ≤10 ns, TTL/CMOS compatibility, SOIC-8 packaging, and guaranteed operation across 0°C to 70°C.

Technical Context

The DS1040Z-B50+ implements a parallel-programmed, edge-triggered monostable multivibrator using all-silicon CMOS logic. Its output width is determined solely by the logic states of P0–P2, with no external timing components required. The device features two complementary outputs (OUT and OUT) and guarantees sub-10 ns intrinsic propagation delay from IN to either output.

It supports standard soldering processes (vapor phase, IR, wave) and exhibits low active current (35–75 mA depending on frequency and width). Width accuracy is specified as ±5% or ±2 ns (whichever is greater) at 25°C, with temperature-induced drift bounded at ±3% or ±1 ns over 0°C to 70°C.

Key Specifications

Pinout & Package

DS1040Z-B50+ is housed in an 8-pin mini-SOIC (150-mil width) package, surface-mount compatible and auto-insertable.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable one-shot applications.

Compared with DS1040M-B50+, DS1040Z-B50+ offers identical timing performance in a space-saving SOIC-8 footprint ideal for high-density optical drive PCBs; compared with MAX7360EPA+, it provides finer 5 ns resolution and simpler parallel programming but lacks serial configurability and extended width range.

Availability

DS1040Z-B50+ is available at Aetrix Electronics and suitable for magneto-optical storage systems, disk drive controller boards, logic timing calibration fixtures, and automated test equipment requiring stable component supply and consistent pulse-width accuracy.

Supply support for DS1040Z-B50+ 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 (acquired by Analog Devices in 2021) designs precision analog and mixed-signal ICs for timing, power, and interface applications.

The DS1040 series was developed by Dallas Semiconductor specifically for high-reliability, programmable pulse generation in optical storage and digital test systems where hybrid timing solutions were previously used.

FAQ

What is the exact pulse width range programmed by DS1040Z-B50+?

The DS1040Z-B50+ provides five fixed pulse widths: 30 ns, 35 ns, 40 ns, 45 ns, and 50 ns - selected via the P0–P2 programming pins. These values are guaranteed within ±5% or ±2 ns (whichever is greater) at 25°C. DS1040Z-B50+ does not support custom widths outside this set unless factory-programmed per special request.

Does DS1040Z-B50+ require external components to operate?

No, DS1040Z-B50+ is a self-contained pulse generator requiring only a 5 V supply, ground, trigger input, and optional pull-up/down resistors on programming pins. No timing capacitors or resistors are needed. A 0.1 µF ceramic decoupling capacitor is recommended between VCC and GND near the package to suppress supply noise affecting width stability.

Can DS1040Z-B50+ drive modern CMOS loads like 74LVC or 74AHC?

Yes, DS1040Z-B50+ can drive 74LVC and 74AHC families. Its IOL = 8 mA and IOH = –1 mA at VCC = 4.75 V meet or exceed the input current requirements of these families. However, for best noise immunity and rise/fall time control, keep trace lengths short and avoid driving more than three such loads without buffering.

Is DS1040Z-B50+ pin-compatible with other DS1040 variants?

Yes, DS1040Z-B50+ shares identical pinout and logic behavior with all DS1040Z (SOIC-8) variants including DS1040Z-75+, DS1040Z-100+, and DS1040Z-A15+. The only differences are programmed width ranges and corresponding internal trimming - no PCB layout change is needed when substituting within the Z-series.

What is the maximum operating frequency of DS1040Z-B50+?

The DS1040Z-B50+ has no specified maximum frequency, but its minimum period is tWO + 50 ns (e.g., 100 ns for 50 ns width), limiting practical repetition rate to ≤10 MHz. At higher rates, pulse width accuracy degrades due to insufficient recovery time; for reliable operation, maintain ≥2× the maximum width as inter-pulse interval.