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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

onsemi DM74ALS32SJX

Name: DM74ALS32SJX
Brand: onsemi
SKU: DM74ALS32SJX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DM74ALS32SJX

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-SOIC (0.209", 5.30mm Width)

Datasheet:: DM74ALS32SJX.pdf

Description:: IC GATE OR 4CH 2-INP 14SOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DM74ALS32SJX from Fairchild Semiconductor is a quad 2-input OR gate IC in 14-lead SOP (EIAJ TYPE II, 5.3 mm wide) package, operating at VCC = 4.5–5.5 V, with propagation delays as low as 3 ns (tPLH/tPHL), output drive of ±112 mA (IO), and guaranteed performance across 0°C to +70°C. It performs discrete logic OR functions in TTL-compatible digital control paths.

For engineers reviewing the DM74ALS32SJX datasheet, pinout, applications, or equivalent options, key selection criteria include its 50 pF load-optimized switching speed, Schottky TTL process compatibility, input voltage thresholds (VIH = 2.0 V, VIL = 0.8 V), and guaranteed operation over full commercial temperature range.

Technical Context

This device implements four independent 2-input OR gates using advanced oxide-isolated, ion-implanted Schottky TTL technology. Each gate delivers rail-to-rail compatible logic levels with VOH ≥ VCC − 2 V and VOL ≤ 0.5 V at IOL = 8 mA, supporting direct interfacing with standard TTL and LS families.

Switching characteristics are specified at CL = 50 pF and RL = 500 Ω, with tPLH/tPHL ranging 3–14 ns. Input clamp voltage (VIK = −1.5 V) and low-level input current (IIL = −0.1 mA) ensure robust noise immunity and bus termination compatibility in multi-gate logic systems.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	4.5 V to 5.5 V - Ensures stable operation with standard +5 V supply rails and tolerance for ripple or droop.
tPLH / tPHL	3 ns (min) to 14 ns (max) - Enables high-speed combinational logic in clocked control and address decoding paths.
VOH / VOL	≥ VCC − 2 V / ≤ 0.5 V - Guarantees TTL-compatible output swing for reliable fanout to up to 20 LS-TTL loads.
IOL / IOH	8 mA / −0.4 mA - Supports direct driving of LEDs, small relays, or downstream TTL inputs without external buffers.
VIH / VIL	2.0 V / 0.8 V - Defines unambiguous logic threshold for noise margin > 0.4 V in mixed-logic systems.
Operating Temp	0°C to +70°C - Qualified for commercial-grade embedded controllers, instrumentation, and industrial logic panels.

Pinout & Package

DM74ALS32SJX uses a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm wide (Package Number M14D), with gull-wing leads and standard 1.27 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 8, 9, 11, 12	Input A/B for Gates 1–4	Dual inputs per OR gate; electrically identical, support wired-OR expansion via open-collector emulation.
3, 6, 10, 13	Output Y for Gates 1–4	Active-high TTL outputs; each capable of sinking 8 mA or sourcing −0.4 mA under spec conditions.
7	GND	Logic ground reference; must be low-impedance connection to minimize switching noise coupling.
14	VCC	+5 V power supply; requires local 0.1 µF ceramic decoupling adjacent to pin for stable AC performance.

Key Features

Feature	Design Value
Quad 2-input OR logic	Four independent gates on one die-reduces board space and interconnect count vs. discrete gate arrays.
50 pF switching spec	Guaranteed timing at realistic PCB trace/load capacitance-eliminates need for derating in layout-critical designs.
Full temp/VCC range guarantee	Electrical specs validated from 0°C to +70°C and VCC = 4.5–5.5 V-no design margin assumptions required.
Schottky TTL process	Oxide-isolated, ion-implanted construction-delivers lower power-delay product than standard TTL while maintaining pinout compatibility.

Applications

Industrial Control Logic	Test Equipment Signal Routing
Use Scenario: Combining multiple sensor fault signals into a single alarm line in PLC backplanes. IC Role / Device Role / Timing Role: Discrete OR gate performing real-time wired-OR aggregation of active-low fault flags. Use Value: Eliminates need for microcontroller polling; provides sub-14 ns response to any input assertion.	Use Scenario: Enabling signal path selection in automated test fixtures with parallel stimulus channels. IC Role / Device Role / Timing Role: Gate-level enable combiner routing trigger pulses to DUT interface points. Use Value: Delivers deterministic <14 ns propagation delay between control input and output activation.
Legacy System Repair	Power-Up Sequencing Logic
Use Scenario: Replacing obsolete 74S32 or 74LS32 in vintage computer peripheral boards. IC Role / Device Role / Timing Role: Pin-for-pin drop-in OR gate replacement preserving original timing and loading behavior. Use Value: Maintains functional equivalence without PCB rework or timing recalculations.	Use Scenario: Generating master reset enable when all DC/DC converters reach regulation. IC Role / Device Role / Timing Role: OR-ing individual POK (power-ok) signals to form system-wide reset release. Use Value: Leverages guaranteed VOL ≤ 0.5 V to drive TTL reset inputs directly with no level-shifting.

Industrial Control Logic

Test Equipment Signal Routing

Use Scenario: Combining multiple sensor fault signals into a single alarm line in PLC backplanes.

IC Role / Device Role / Timing Role: Discrete OR gate performing real-time wired-OR aggregation of active-low fault flags.

Use Value: Eliminates need for microcontroller polling; provides sub-14 ns response to any input assertion.

Use Scenario: Enabling signal path selection in automated test fixtures with parallel stimulus channels.

IC Role / Device Role / Timing Role: Gate-level enable combiner routing trigger pulses to DUT interface points.

Use Value: Delivers deterministic <14 ns propagation delay between control input and output activation.

Legacy System Repair

Power-Up Sequencing Logic

Use Scenario: Replacing obsolete 74S32 or 74LS32 in vintage computer peripheral boards.

IC Role / Device Role / Timing Role: Pin-for-pin drop-in OR gate replacement preserving original timing and loading behavior.

Use Value: Maintains functional equivalence without PCB rework or timing recalculations.

Use Scenario: Generating master reset enable when all DC/DC converters reach regulation.

IC Role / Device Role / Timing Role: OR-ing individual POK (power-ok) signals to form system-wide reset release.

Use Value: Leverages guaranteed VOL ≤ 0.5 V to drive TTL reset inputs directly with no level-shifting.

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALS32N	Same ALS family, PDIP package (N14A); identical electrical specs but higher θJA (89°C/W vs. 120°C/W for SOP).	Preferred where through-hole assembly or socketing is required; thermal performance better in low-airflow environments.	Select SN74ALS32N for legacy through-hole builds or manual prototyping; DM74ALS32SJX preferred for surface-mount volume production.
MC74ALS32DG	Identical function and specs; manufactured by ON Semiconductor (ex-Fairchild), SOIC-14 package with same M14D footprint.	No functional or mechanical difference; qualified for same commercial temperature range and supply conditions.	MC74ALS32DG is a second-source option with identical pinout, timing, and drive capability-ideal for supply chain diversification.

Compared with SN74ALS32N and MC74ALS32DG, DM74ALS32SJX offers identical logic functionality and electrical behavior but differs in package thermal resistance and sourcing origin-making it optimal for modern SMT lines requiring JEDEC-compliant SOP assembly and consistent lifecycle management.

Availability

DM74ALS32SJX is available at Aetrix Electronics and suitable for industrial control logic, test equipment signal routing, legacy system repair, and power-up sequencing applications requiring stable component supply and long-term obsolescence mitigation.

Supply support for DM74ALS32SJX 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and discrete power products, acquired by ON Semiconductor in 2016. Its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The DM74ALS32SJX belongs to the 74ALS (Advanced Low-Power Schottky) logic family, designed for high-speed, low-power digital control in commercial-grade systems where TTL compatibility and predictable timing are essential.

FAQ

What logic family does DM74ALS32SJX belong to, and how does it differ from standard TTL?

DM74ALS32SJX belongs to the 74ALS (Advanced Low-Power Schottky) family. It uses oxide-isolated, ion-implanted Schottky TTL process to achieve faster switching (3–14 ns) and lower power consumption than standard 74TTL, while maintaining pin compatibility and identical logic function. Unlike 74LS, DM74ALS32SJX guarantees performance across full VCC (4.5–5.5 V) and temperature (0°C to +70°C) ranges.

Is DM74ALS32SJX pin-compatible with other 74-series OR gate variants like 74LS32 or 74S32?

Yes, DM74ALS32SJX is functionally and pin-for-pin compatible with 74LS32 and 74S32. All three share identical 14-pin SOP/SOIC/DIP pinouts, input/output voltage thresholds, and logic truth table (Y = A + B). However, DM74ALS32SJX offers improved AC performance and tighter parameter guarantees across temperature and supply voltage.

What is the maximum capacitive load DM74ALS32SJX can drive while maintaining specified propagation delay?

DM74ALS32SJX switching characteristics-including tPLH and tPHL-are specified and guaranteed at CL = 50 pF. Driving loads significantly above this value will increase propagation delay beyond the 3–14 ns range and may cause timing violations in synchronous systems. For heavier loads, buffer stages or lower-capacitance routing should be used.

Does DM74ALS32SJX support mixed-voltage interfacing, such as 3.3 V inputs?

No, DM74ALS32SJX is a 5 V-only TTL-family device. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) are designed for 5 V logic levels. Applying 3.3 V inputs may result in marginal or undefined logic states, especially under temperature or supply variation. Level-shifting circuitry is required for reliable 3.3 V to 5 V interface.

What is the recommended decoupling for DM74ALS32SJX in high-speed applications?

A 0.1 µF ceramic capacitor placed as close as possible to the VCC (pin 14) and GND (pin 7) pins is mandatory for stable operation. This minimizes supply bounce during simultaneous output transitions. For systems with multiple DM74ALS32SJX devices, add a bulk 4.7–10 µF tantalum or aluminum electrolytic capacitor per power rail segment.

DM74ALS32SJX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74ALS

Package/Case:: 14-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: OR Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: -

Current - Output High, Low:: 400µA, 8mA

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 14ns @ 5V, 50pF

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOP

DM74ALS32SJX FAQ

1.How can I place an order for DM74ALS32SJX through Aetrix?

Please submit a Request for Quotation (RFQ) for DM74ALS32SJX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DM74ALS32SJX reliable?

The price and inventory of DM74ALS32SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS32SJX is usually 5 days.

3.What payment methods are accepted for DM74ALS32SJX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS32SJX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DM74ALS32SJX?

DM74ALS32SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DM74ALS32SJX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DM74ALS32SJX?

For technical support, including DM74ALS32SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS32SJX requirements.

6.How does Aetrix verify that DM74ALS32SJX is sourced from the original manufacturer or authorized distributors?

All DM74ALS32SJX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DM74ALS32SJX meets industry standards.

7.What is the process for return or replacement of DM74ALS32SJX?

All DM74ALS32SJX units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS32SJX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DM74ALS32SJX part is unused and in its original packaging.

Return procedure for DM74ALS32SJX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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