Analog Devices Inc./Maxim Integrated DS1040Z-B40+

Overview

DS1040Z-B40+ 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 20 ns, 25 ns, 30 ns, 35 ns, and 40 ns (max), with width tolerance ±5% or ±2 ns (whichever greater), and intrinsic delay ≤10 ns. Used in magneto-optical laser power control and precision timing circuits requiring stable sub-50 ns pulses.

For engineers reviewing the DS1040Z-B40+ datasheet, DS1040Z-B40+ pinout, DS1040Z-B40+ application, or DS1040Z-B40+ equivalent, key selection criteria include programmable width resolution, TTL/CMOS compatibility, dual (inverted/non-inverted) outputs, 5 V supply operation, and SOIC-8 packaging for automated assembly.

Technical Context

The DS1040Z-B40+ implements a fully silicon-based monostable multivibrator architecture with parallel binary programming (3-bit P2/P1/P0) to select one of five fixed pulse widths. Its internal timing circuitry is calibrated to deliver stable widths across 0°C to 70°C, with temperature-induced width variation ≤±1 ns or ±3% (≥50 ns variants) or ≤±1 ns or ±9% (<50 ns variants).

It features dual complementary outputs (OUT and OUT), each capable of driving up to five 74LS loads, and operates with 4.75 V to 5.25 V supply at typical active current of 35–75 mA depending on pulse frequency and width. Input trigger requires ≥5 ns high/low pulse width and is referenced to 1.5 V threshold for intrinsic delay measurement.

Key Specifications

Pinout & Package

DS1040Z-B40+ is housed in an 8-pin SOIC package (150-mil width), surface-mount compatible and vapor-phase/wave-solderable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1040M-B40+, DS1040Z-B40+ offers identical timing performance in a surface-mount package for automated production; compared with MAX7367EKA+T, it provides programmable width selection and dual outputs at the cost of larger area and higher active current.

Availability

DS1040Z-B40+ is available at Aetrix Electronics and suitable for magneto-optical storage systems, disk drive controllers, high-speed test equipment, and industrial PWM interfaces requiring stable component supply and long-term manufacturability.

Supply support for DS1040Z-B40+ 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The DS1040 series belongs to Maxim's legacy timing and pulse generation product line, designed specifically for applications demanding sub-50 ns programmable pulse widths with high repeatability and low jitter in commercial-temperature environments.

FAQ

What is the maximum pulse width supported by DS1040Z-B40+?

The DS1040Z-B40+ supports a maximum programmable pulse width of 40 ns, corresponding to the binary code P2=1, P1=0, P0=0. This value is factory-calibrated and guaranteed over 0°C to 70°C with tolerance of ±5% or ±2 ns, whichever is greater. All five widths (20 ns, 25 ns, 30 ns, 35 ns, 40 ns) are defined in Table 1 of the DS1040 datasheet and apply specifically to DS1040Z-B40+.

Does DS1040Z-B40+ require external components for basic operation?

No, DS1040Z-B40+ operates autonomously with only a 5 V supply (VCC), ground (GND), and a clean trigger input (IN). A 0.1 µF ceramic decoupling capacitor is recommended between VCC and GND near the device. No external timing resistors or capacitors are needed-pulse width is set entirely by the logic states of P0–P2, making DS1040Z-B40+ a self-contained, zero-component one-shot solution.

Can DS1040Z-B40+ drive standard TTL loads directly?

Yes, DS1040Z-B40+ is specified to drive up to five 74LS loads per output (OUT or OUT) under DC conditions, with IOL = 8 mA and IOH = –1 mA at VOL = 0.5 V and VOH = 4 V. Its TTL/CMOS-compatible input thresholds and output voltage levels ensure interoperability with legacy 5 V logic families without level-shifting circuitry, confirming DS1040Z-B40+ suitability for mixed-technology systems.

What is the intrinsic delay of DS1040Z-B40+ and how is it measured?

The intrinsic delay (tD) of DS1040Z-B40+ is guaranteed ≤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 pulse, at TA = 25°C and VCC = 5.0 V ±5%. This parameter is independent of programmed width and reflects internal propagation latency. DS1040Z-B40+'s consistent tD enables predictable timing alignment in synchronous systems.

Is DS1040Z-B40+ RoHS compliant and lead-free?

Yes, DS1040Z-B40+ is RoHS compliant and lead-free, meeting JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements for SOIC-8 packages. It supports vapor-phase, infrared, and wave soldering per manufacturer specifications, with peak solder temperature rated at 260°C for 10 seconds. Full compliance documentation is available in Maxim's official product change notices for DS1040Z-B40+.