Analog Devices Inc./Maxim Integrated DS1040Z-75

Overview

DS1040Z-75 from Dallas Semiconductor (now Maxim Integrated) is a rising-edge-triggered, CMOS programmable one-shot pulse generator with fixed 75 ns nominal maximum output pulse width, 5% or 2 ns width tolerance, TTL/CMOS-compatible I/O, 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-75 datasheet, DS1040Z-75 pinout, DS1040Z-75 application, or DS1040Z-75 equivalent, key selection considerations include its precise 75 ns max pulse width, intrinsic delay ≤10 ns, dual-output capability, SOIC-8 packaging, and compatibility with standard logic families in timing-critical digital control circuits.

Technical Context

The DS1040Z-75 implements a user-programmable monostable multivibrator using all-silicon CMOS technology. Its pulse width is determined solely by internal logic decoding of the P0–P2 programming pins - for DS1040Z-75, this configuration yields a fixed 75 ns maximum width with increments of 15 ns (15/30/45/60/75 ns), stable across 0°C to 70°C.

It features separate OUT and OUT̅ outputs, both capable of driving 5× 74LS loads, with intrinsic delay ≤10 ns from trigger (IN) to output edge. Power-up time is 100 ms, and it supports vapor-phase, IR, and wave soldering per JEDEC standards.

Key Specifications

Pinout & Package

DS1040Z-75 is housed in an 8-pin SOIC package (150-mil width), pin-compatible with industry-standard 8-lead mini-SOIC footprints. Pin 1 is IN (trigger input), Pins 2–4 are P0–P2 (programming inputs), Pin 5 is GND, Pins 6–7 are OUT and OUT̅ (complementary pulse outputs), and Pin 8 is VCC (+5 V).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1040M-75 and MAX16922ETA+, the DS1040Z-75 delivers optimal balance of simplicity, precision, and SMT compatibility for fixed 75 ns pulse generation - requiring no firmware, no external components, and zero layout changes versus other DS1040 variants.

Availability

DS1040Z-75 is available at Aetrix Electronics and suitable for magneto-optical storage systems, disk drive controller designs, digital test instrumentation, and industrial timing modules requiring stable component supply and long-lifecycle availability.

Supply support for DS1040Z-75 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), specialized in precision timing, memory, and mixed-signal ICs for industrial and embedded applications.

The DS1040 series was designed specifically for high-reliability, fixed- and programmable-pulse timing in optical storage, test equipment, and digital control systems where hybrid solutions posed reliability and cost challenges.

FAQ

What is the exact pulse width behavior of the DS1040Z-75?

The DS1040Z-75 provides five selectable pulse widths: 15 ns, 30 ns, 45 ns, 60 ns, and 75 ns - all with a tolerance of ±(5% or 2 ns, whichever is greater). The width is set by the logic states of P0–P2 pins; for DS1040Z-75, the default or factory-configured setting yields 75 ns maximum width. Each width is stable over temperature (0°C to +70°C) and supply (4.75 V to 5.25 V), with intrinsic delay ≤10 ns.

Does the DS1040Z-75 require external components to operate?

No, the DS1040Z-75 operates autonomously with only a +5 V supply and ground connection. A 0.1 µF ceramic bypass capacitor is recommended near the VCC pin for noise suppression, but no resistors, capacitors, or clocks are needed for basic pulse generation. Programming is done via static logic levels on P0–P2, and triggering occurs on the rising edge of the IN signal - making DS1040Z-75 a true plug-and-play timing element.

Can the DS1040Z-75 drive modern logic families like 74LVC or ARM GPIO?

Yes, the DS1040Z-75 outputs are TTL/CMOS-compatible and specified to drive up to five 74LS loads. Its VOH ≥4.0 V and VOL ≤0.5 V at VCC = 4.75 V meet 74LVC input thresholds, and its output swing (0 V to ~5 V) is safe for 5 V-tolerant ARM microcontroller GPIO. However, for 3.3 V-only I/O, a level shifter is advised - DS1040Z-75 itself does not support 3.3 V operation.

Is the DS1040Z-75 pin-compatible with other DS1040 variants?

Yes, all DS1040 variants - including DS1040Z-75, DS1040M-75, DS1040Z-100, and DS1040Z-500 - share identical 8-pin SOIC (Z) or DIP (M) pinouts and logic-level compatibility. The only functional difference is the programmed pulse width range; the DS1040Z-75's internal logic decodes P0–P2 to deliver its specific 15–75 ns set, but pin assignment, timing behavior, and electrical specs remain consistent across the family.

What is the power-up behavior of the DS1040Z-75?

After VCC reaches valid level, the DS1040Z-75 requires 100 ms before timing specifications stabilize - during this power-up time, outputs remain inactive and unpredictable. This specification is explicitly defined in the datasheet and must be accounted for in systems where immediate post-power-on triggering is required. No external reset is needed; DS1040Z-75 enters ready state automatically after tPU completes.