Analog Devices Inc./Maxim Integrated DS1040Z-A32

Overview

DS1040Z-A32 from Dallas Semiconductor (now Maxim Integrated) is a rising-edge-triggered, CMOS programmable one-shot pulse generator with five precise output widths selectable via three parallel programming pins (P0–P2). It delivers nominal pulse widths of 22.5 ns to 32.5 ns (min to max), ±5% or ±2 ns tolerance, and supports TTL/CMOS loads up to five 74LS units. Used in magneto-optical laser power control timing circuits.

For engineers reviewing the DS1040Z-A32 datasheet, DS1040Z-A32 pinout, DS1040Z-A32 application, or DS1040Z-A32 equivalent, key selection criteria include programmable width resolution (2.5 ns steps), intrinsic delay ≤10 ns, dual non-inverted/inverted outputs, 5 V supply compatibility, and SOIC-8 packaging for surface-mount integration.

Technical Context

The DS1040Z-A32 implements a fully silicon-based monostable multivibrator architecture with parallel binary-coded programming inputs (P2–P0) that select one of five fixed pulse widths. Its internal timing circuitry achieves stable width generation without external RC components, relying on process-controlled CMOS delay elements calibrated at wafer test.

It features dual complementary outputs (OUT and OUT) driven by low-impedance CMOS buffers capable of sourcing/sinking ≥1 mA at VOH/VOL specifications, with input trigger sensitivity defined by VIH ≥2.2 V and VIL ≤0.8 V under 5 V ±5% supply conditions.

Key Specifications

Pinout & Package

DS1040Z-A32 is housed in an 8-pin mini-SOIC package (150-mil width), RoHS-compliant, vapor-phase/wave-solderable, with 1.27 mm pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1040M-A32 and MAX16922AUB+T, the DS1040Z-A32 uniquely combines SOIC-8 surface-mount compatibility, factory-calibrated 2.5 ns width steps, and dual complementary outputs - making it optimal for space-constrained, high-reliability optical timing applications where precision and repeatability outweigh configurability.

Availability

DS1040Z-A32 is available at Aetrix Electronics and suitable for magneto-optical storage systems, high-speed test instrumentation, legacy TTL interface design, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.

Supply support for DS1040Z-A32 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, data communication, and mixed-signal ICs for industrial, computing, and telecom markets.

The DS1040 series was designed specifically for applications demanding repeatable, temperature-stable pulse generation without external timing components - targeting optical storage, test equipment, and digital system synchronization.

FAQ

What is the exact pulse width range programmed by P2–P0 logic states for DS1040Z-A32?

The DS1040Z-A32 provides five discrete pulse widths: 22.5 ns, 25 ns, 27.5 ns, 30 ns, and 32.5 ns - corresponding to binary codes 000 through 100 on P2–P0 (MSB to LSB). These values are fixed per device variant and verified in Table 1 of the official datasheet; no interpolation or intermediate widths are supported. The DS1040Z-A32 does not support custom widths beyond this set.

Does DS1040Z-A32 support both inverted and non-inverted outputs simultaneously?

Yes, DS1040Z-A32 provides two independent outputs: OUT (non-inverted) and OUT (inverted), both asserted synchronously on the rising edge of the IN trigger. Each output can drive up to five 74LS loads independently. This dual-output capability eliminates the need for external inverters in applications requiring complementary timing signals, such as H-bridge gate control or differential strobing.

What is the maximum intrinsic delay (tD) specification for DS1040Z-A32, and how is it measured?

The intrinsic delay tD for DS1040Z-A32 is specified as 0–10 ns, measured between the 1.5 V point on the rising edge of the IN trigger and the 1.5 V point on the rising edge of the OUT output, under TA = 25°C and VCC = 5.0 V ±0.1 V. This parameter is guaranteed across the full operating temperature range (0°C to +70°C) and defines the minimum latency between input activation and output response in the DS1040Z-A32.

Can DS1040Z-A32 operate reliably with a 3.3 V supply?

No, DS1040Z-A32 is specified only for VCC = 4.75 V to 5.25 V. Its input thresholds (VIH ≥2.2 V, VIL ≤0.8 V) and output drive characteristics are optimized for 5 V TTL/CMOS logic families. Operation at 3.3 V falls outside the Absolute Maximum Ratings and DC Electrical Characteristics - resulting in undefined timing behavior, increased width error, and potential failure to trigger or drive loads. Use only with regulated 5 V supply.

Is DS1040Z-A32 pin-compatible with other DS1040 variants like DS1040Z-100 or DS1040Z-200?

Yes, all DS1040Z variants - including DS1040Z-A32, DS1040Z-100, and DS1040Z-200 - share identical 8-pin SOIC packaging, pinout, and electrical interface. Only the programmed pulse width set differs per variant; all other timing, drive, and logic specifications remain unchanged. This allows drop-in replacement during design iteration or production ramp when different width requirements emerge.