Analog Devices Inc./Maxim Integrated DS1040Z-D70

Overview

DS1040Z-D70 from Dallas Semiconductor (now Maxim Integrated) is a rising-edge-triggered, CMOS programmable one-shot pulse generator with five precise pulse widths (30 ns to 70 ns), ±5% or ±2 ns width tolerance, and dual inverting/non-inverting outputs. It operates at 5 V, drives up to five 74LS loads, and targets laser power control in magneto-optical disk read/write systems.

For engineers reviewing the DS1040Z-D70 datasheet, DS1040Z-D70 pinout, DS1040Z-D70 application, or DS1040Z-D70 equivalent, key selection factors include programmable width resolution (10 ns steps), intrinsic delay ≤10 ns, TTL/CMOS compatibility, SOIC-8 packaging, and guaranteed operation from 0°C to 70°C.

Technical Context

The DS1040Z-D70 implements a parallel-programmed, edge-triggered monostable multivibrator using all-silicon CMOS logic. Pulse width is selected via three binary-coded programming pins (P0–P2), with fixed width mapping per Table 1: 30/40/50/60/70 ns max widths across eight input combinations.

It features dual complementary outputs (OUT and OUT̅), intrinsic propagation delay ≤10 ns from trigger edge to output edge, and stable timing over temperature (±3% or ±1 ns variation from 0°C to 70°C). Power-up stabilization requires ≤100 ms before timing specs are valid.

Key Specifications

Pinout & Package

DS1040Z-D70 is housed in an 8-pin SOIC package (150-mil width), surface-mount compatible with vapor phase, IR, and wave soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1040M-D70 and MC14538BDR2G, the DS1040Z-D70 uniquely delivers factory-calibrated, pin-selectable widths in a compact SOIC-8 package-enabling zero-component, software-configurable timing without layout changes or calibration overhead.

Availability

DS1040Z-D70 is available at Aetrix Electronics and suitable for magneto-optical storage systems, laser diode gate control circuits, disk drive servo subsystems, and legacy logic timing calibration requiring stable component supply and long-term obsolescence management.

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

Dallas Semiconductor, now part of Maxim Integrated (a subsidiary of Analog Devices), designs precision timing, memory, and interface ICs for industrial, computing, and communications applications.

The DS1040 series was developed specifically for high-reliability, programmable pulse generation in optical storage and instrumentation systems where hybrid timing solutions posed yield and longevity challenges.

FAQ

What is the exact pulse width range supported by DS1040Z-D70?

The DS1040Z-D70 provides five discrete, factory-programmed pulse widths: 30 ns, 40 ns, 50 ns, 60 ns, and 70 ns maximum. These values are defined by the logic states on P0–P2 pins per Table 1 in the datasheet. Minimum width equals maximum width minus 10 ns for each step, resulting in a 20 ns minimum pulse for the 30 ns variant and 60 ns for the 70 ns variant. DS1040Z-D70 does not support intermediate or analog-adjusted widths.

Is DS1040Z-D70 pin-compatible with other DS1040 variants like DS1040Z-100?

Yes, DS1040Z-D70 shares identical SOIC-8 pinout, supply requirements, and logic interface with all DS1040Z-series devices including DS1040Z-100. The only functional difference is the programmed width table-DS1040Z-D70 maps P0–P2 codes to 30/40/50/60/70 ns, while DS1040Z-100 maps to 20/40/60/80/100 ns. No PCB change is needed when substituting within the DS1040Z family.

What is the intrinsic delay specification for DS1040Z-D70 and how is it measured?

The intrinsic delay (tD) of DS1040Z-D70 is specified as 0–10 ns, measured from the 1.5 V point on the rising edge of the IN trigger pulse to the 1.5 V point on the rising edge of the OUT pulse under test conditions (VCC = 5.0 V ±0.1 V, TA = 25°C). This delay is independent of programmed width and represents fixed propagation latency through internal logic gates and output drivers.

Can DS1040Z-D70 operate outside the 0°C to +70°C range?

No-DS1040Z-D70 is rated exclusively for 0°C to +70°C operation per its Absolute Maximum Ratings and DC/AC Electrical Characteristics tables. While storage temperature extends to −55°C to +125°C, functional timing performance (width accuracy, delay, drive strength) is only guaranteed within the 0°C to +70°C range. For extended temperature use, Dallas offered DS1040X variants (e.g., DS1040X-D70), which are not equivalent to DS1040Z-D70.

Does DS1040Z-D70 require external components for basic operation?

No-DS1040Z-D70 operates stand-alone with only VCC, GND, IN, and load connections. No external resistors, capacitors, or timing components are needed. The pulse width is fully determined by the static logic states of P0–P2. Decoupling capacitor (0.1 µF ceramic) near VCC/GND is recommended for noise immunity but is not functionally required for timing generation.