Analog Devices Inc./Maxim Integrated DS1040Z-D70+

Overview

DS1040Z-D70+ from Maxim Integrated (formerly Dallas Semiconductor) is a rising-edge-triggered, CMOS programmable one-shot pulse generator with five precise pulse widths selectable via three parallel programming pins (P0–P2). It delivers nominal output pulse widths of 30 ns, 40 ns, 50 ns, 60 ns, and 70 ns (±5% or ±2 ns), features both inverted and non-inverted outputs, and drives up to five 74LS loads. It is used in magneto-optical laser power control and precision timing circuits requiring stable sub-100 ns pulses.

For engineers reviewing the DS1040Z-D70+ datasheet, DS1040Z-D70+ pinout, DS1040Z-D70+ application, or DS1040Z-D70+ equivalent, key selection criteria include programmable width resolution, intrinsic delay ≤10 ns, TTL/CMOS compatibility, dual-output polarity, and SOIC-8 packaging for space-constrained PCB layouts.

Technical Context

The DS1040Z-D70+ implements a fully silicon-based, all-CMOS one-shot architecture with no external timing components. Its pulse width is determined solely by the logic states of P0–P2, with fixed width steps (10 ns increments from 30 ns to 70 ns) and guaranteed accuracy of ±5% or ±2 ns - whichever is greater - over 0°C to +70°C.

It features dual complementary outputs (OUT and OUT̅), intrinsic delay ≤10 ns from trigger edge to output edge, and supports standard soldering processes (vapor phase, IR, wave). Input trigger requires ≥5 ns high/low pulse width and operates at VCC = 4.75 V to 5.25 V with VIH ≥ 2.2 V and VIL ≤ 0.8 V.

Key Specifications

Pinout & Package

DS1040Z-D70+ is housed in an 8-pin SOIC package (150-mil width, JEDEC MS-012), surface-mount compatible with automated assembly and reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1040M-D70+, the DS1040Z-D70+ offers identical timing performance in a smaller, surface-mount package; compared with MAX7360ETE+, it provides simpler, lower-cost, fixed-function pulse generation without firmware overhead or I²C dependency.

Availability

DS1040Z-D70+ is available at Aetrix Electronics and suitable for laser power control, disk drive timing, logic debouncing, and test equipment pulse shaping requiring stable component supply and guaranteed commercial-temperature operation.

Supply support for DS1040Z-D70+ 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) is a U.S.-based semiconductor company specializing in analog, mixed-signal, and high-reliability timing solutions.

The DS1040 series was developed by Dallas Semiconductor specifically for precision, low-jitter, single-event pulse generation in optical storage, industrial control, and instrumentation - emphasizing silicon-based stability over RC or crystal alternatives.

FAQ

What pulse widths does the DS1040Z-D70+ support?

The DS1040Z-D70+ supports five fixed pulse widths: 30 ns, 40 ns, 50 ns, 60 ns, and 70 ns. These widths are selected using the binary states of programming pins P0–P2. The "D70" suffix indicates the equal-increment variant (10 ns steps), and width accuracy is guaranteed at ±5% or ±2 ns - whichever is greater - across 0°C to +70°C.

Is the DS1040Z-D70+ pin-compatible with other DS1040 variants?

Yes, the DS1040Z-D70+ shares identical pinout and electrical behavior with all DS1040Z (SOIC-8) variants, including DS1040Z-500+ and DS1040Z-B50+. Pin compatibility extends to DS1040M-D70+ (DIP-8), differing only in physical package dimensions and mounting method - no changes to schematic or netlist are required when substituting within the same package family.

What is the intrinsic delay of the DS1040Z-D70+?

The intrinsic delay (t_D) of the DS1040Z-D70+ is specified as 0 ns to 10 ns - measured from the 1.5 V point on the rising edge of the IN trigger to the 1.5 V point on the rising edge of the OUT output. This low, bounded delay enables deterministic timing in high-speed control loops, such as laser diode gating where jitter must remain below 10 ns.

Can the DS1040Z-D70+ drive standard TTL loads directly?

Yes, the DS1040Z-D70+ can drive up to five 74LS TTL loads per output (OUT or OUT̅) without external buffering. Its I_OL ≥ 8 mA and I_OH ≥ –1 mA at V_CC = 4.75 V meet LS-TTL voltage and current requirements, making it suitable for direct interfacing with legacy logic families in industrial and test equipment designs.

Does the DS1040Z-D70+ require external passive components for operation?

No, the DS1040Z-D70+ requires no external resistors, capacitors, or crystals to generate its programmed pulse widths. It is a fully self-contained, all-silicon one-shot. A 0.1 µF ceramic decoupling capacitor between VCC and GND is recommended near the device for supply noise suppression, but no timing components are needed - simplifying BOM and improving long-term timing stability.