Analog Devices Inc./Maxim Integrated DS1040Z-B50

Overview

DS1040Z-B50 from Dallas Semiconductor (now Maxim Integrated) is a CMOS programmable one-shot pulse generator with five precise, user-selectable pulse widths ranging from 30 ns to 50 ns in 5 ns increments. It features rising-edge triggering, dual complementary outputs (OUT and OUT), and operates at 5 V with TTL/CMOS compatibility. 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 criteria include programmable width resolution (5 ns steps), intrinsic delay ≤10 ns, ±5% or ±2 ns width tolerance, dual-output drive capability (up to five 74LS loads), and SOIC-8 packaging for surface-mount reliability.

Technical Context

The DS1040Z-B50 implements a parallel-programmed monostable multivibrator using all-silicon CMOS logic. Pulse width is selected via three binary-coded programming pins (P0–P2), with fixed mapping per Table 1 yielding max widths of 50 ns and min widths of 30 ns. The device produces both non-inverted and inverted output pulses simultaneously on separate terminals.

Timing behavior is defined by intrinsic delay (≤10 ns), input pulse width requirements (≥5 ns high/low), and power-up stabilization time (100 ms). Output pulse width accuracy is specified as ±5% or ±2 ns - whichever is greater - at 25°C and VCC = 5.0 V ±5%, with temperature-induced variation up to ±3% or ±1 ns over 0°C–70°C.

Key Specifications

Pinout & Package

DS1040Z-B50 is housed in an 8-pin SOIC package (150-mil width), RoHS-compliant, vapor-phase/wave-solderable, and auto-insertable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1040Z-D60 and DS1040Z-B40, the DS1040Z-B50 uniquely delivers a 30–50 ns width window with 5 ns steps - ideal for mid-range MO laser gating where 50 ns represents optimal thermal dwell time without compromising data density.

Availability

DS1040Z-B50 is available at Aetrix Electronics and suitable for magneto-optical storage systems, high-speed logic test fixtures, and programmable gate driver timing circuits requiring stable component supply and traceable sourcing.

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

Dallas Semiconductor, now part of Maxim Integrated (acquired 2001), specialized in precision analog, timing, and mixed-signal ICs for industrial, telecom, and storage applications.

The DS1040 series was designed specifically for programmable pulse generation in laser control and high-reliability digital timing systems, emphasizing silicon-based repeatability over hybrid alternatives.

FAQ

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

The DS1040Z-B50 provides five discrete pulse widths: 30 ns, 35 ns, 40 ns, 45 ns, and 50 ns - determined by the logic states of programming pins P0–P2. This range is fixed for the -B50 variant and differs from other DS1040 family members such as -D60 or -B40. Width accuracy is ±5% or ±2 ns, whichever is greater, under nominal operating conditions.

Does DS1040Z-B50 require external components for basic operation?

No, DS1040Z-B50 operates stand-alone with only VCC decoupling (0.1 µF ceramic capacitor recommended near the VCC pin) and proper grounding. No external resistors or capacitors are needed to set pulse width - selection is purely digital via P0–P2. Trigger input conditioning is minimal: IN accepts standard TTL/CMOS levels and requires ≥5 ns pulse width for reliable edge detection.

Can DS1040Z-B50 replace DS1040Z-50 or DS1040Z-D50?

No - DS1040Z-B50 is not interchangeable with DS1040Z-50 or DS1040Z-D50. The -B50 variant has a unique width table (30–50 ns in 5 ns steps), whereas -50 and -D50 denote different families or obsolete markings not documented in the official DS1040 datasheet. Always verify programming pin mapping and width values against Table 1 in the DS1040Z-B50-specific documentation before substitution.

What is the maximum output load capacity of DS1040Z-B50?

Each output (OUT and OUT) of DS1040Z-B50 can drive up to five 74LS TTL loads under standard conditions (VCC = 5.0 V, TA = 25°C). This corresponds to ~400 µA per LS input. For heavier loads or higher speed interfaces, external buffering is recommended. Drive capability degrades slightly at temperature extremes or reduced VCC.

Is DS1040Z-B50 available in DIP packaging?

No - DS1040Z-B50 is specified exclusively in the 8-pin SOIC (150-mil) package, denoted by the "Z" suffix. The through-hole DIP version carries the "M" suffix (e.g., DS1040M-B50), which is a separate orderable part. Pinout and electrical specifications are identical between Z and M variants, but mechanical mounting and thermal characteristics differ.