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

onsemi DM74ALS30AN

Name: DM74ALS30AN
Brand: onsemi
SKU: DM74ALS30AN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DM74ALS30AN

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: DM74ALS30AN.pdf

Description:: IC GATE NAND 1CH 8-INP 14MDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DM74ALS30AN from Fairchild Semiconductor is a single 8-input NAND gate logic IC in 14-lead PDIP package, operating at V_CC = 4.5–5.5 V, with t_PLH/t_PHL ≤ 10/12 ns (CL = 50 pF), I_OL = 8 mA sink capability, and guaranteed performance across 0°C to +70°C. It serves as a high-speed combinational logic element in address decoding, bus control, and enable gating circuits.

For engineers reviewing the DM74ALS30AN datasheet, pinout, applications, or equivalent options, key selection criteria include propagation delay under 50 pF load, TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2.0 V), output drive strength, thermal resistance (θ_JA = 86.5°C/W), and PDIP-14 mechanical compatibility with legacy through-hole PCB layouts.

Technical Context

The DM74ALS30AN implements a single 8-input NAND function using advanced oxide-isolated, ion-implanted Schottky TTL process technology. It delivers improved AC performance over standard Schottky and low-power Schottky TTL counterparts while maintaining functional and pin-for-pin compatibility with those families.

Its logic behavior is strictly defined by the truth table: output Y = NOT(A·B·C·D·E·F·G·H), with all eight inputs referenced to standard TTL voltage levels and capable of driving up to eight standard TTL loads. The device operates only within the recommended V_CC range (4.5–5.5 V) and ambient temperature (0°C to +70°C).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5 V to 5.5 V - ensures stable operation with standard 5 V TTL power rails and tolerates typical supply ripple.
t_PLH/t_PHL	3–10 ns / 3–12 ns - defines maximum signal path delay for synchronous timing-critical logic trees.
I_OL	8 mA - supports direct fan-out to up to 8 standard TTL inputs without buffering.
V_IL/V_IH	0.8 V / 2.0 V - matches standard TTL input threshold requirements for interoperability.
θ_JA	86.5°C/W - enables thermal design margin estimation for PDIP-14 mounting on FR-4 PCBs.
Operating Temp	0°C to +70°C - qualified for commercial-grade industrial control and instrumentation environments.

Pinout & Package

DM74ALS30AN is housed in a 14-lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" wide, with standard through-hole footprint and 0.100" lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
1–8	NAND Inputs A–H	Eight independent TTL-compatible logic inputs; all must be HIGH for LOW output.
9	Ground (GND)	Reference return path for all internal logic and output current sinking.
10	Output (Y)	Active-Low open-collector–compatible TTL output; sinks up to 8 mA.
14	V_CC	Positive supply terminal; requires 4.5–5.5 V DC with local bypass capacitance.

Key Features

Feature	Design Value
8-input NAND logic function	Reduces discrete gate count in wide-input combinatorial logic, e.g., memory chip select decoding.
Guaranteed switching at 50 pF	Ensures predictable timing behavior with standard PCB trace and load capacitance.
Full temperature & V_CC range spec	Eliminates need for derating in commercial-temperature embedded systems.
Pin-for-pin compatible with 74S30/74LS30	Enables drop-in replacement in existing designs using Schottky or low-power Schottky NAND gates.

Applications

Memory Address Decoding	Bus Arbitration Control
Use Scenario: Selecting one of multiple RAM or ROM chips based on upper address bits. IC Role / Device Role / Timing Role: 8-input NAND acts as active-low chip enable generator when all decoded address lines are HIGH. Use Value: Replaces 3–4 smaller NAND gates, reducing component count and propagation delay accumulation.	Use Scenario: Resolving priority among multiple DMA or peripheral request lines. IC Role / Device Role / Timing Role: Combines eight request signals into a single arbitration grant enable with minimal added latency. Use Value: Provides deterministic, race-free enable logic with sub-12 ns worst-case delay.
System Reset Synchronization	Legacy Peripheral Interface Enable
Use Scenario: Generating a synchronized system reset pulse only when eight status conditions are met. IC Role / Device Role / Timing Role: NAND gate functions as an 8-term safety interlock, asserting reset when all monitored signals are valid. Use Value: Ensures fail-safe startup sequencing without external microcontroller intervention.	Use Scenario: Enabling legacy ISA or parallel port peripherals only when all handshake and configuration signals align. IC Role / Device Role / Timing Role: Acts as final hardware-level enable gate before data transfer begins. Use Value: Prevents spurious writes by requiring full 8-signal readiness before activation.

Memory Address Decoding

Bus Arbitration Control

Use Scenario: Selecting one of multiple RAM or ROM chips based on upper address bits.

IC Role / Device Role / Timing Role: 8-input NAND acts as active-low chip enable generator when all decoded address lines are HIGH.

Use Value: Replaces 3–4 smaller NAND gates, reducing component count and propagation delay accumulation.

Use Scenario: Resolving priority among multiple DMA or peripheral request lines.

IC Role / Device Role / Timing Role: Combines eight request signals into a single arbitration grant enable with minimal added latency.

Use Value: Provides deterministic, race-free enable logic with sub-12 ns worst-case delay.

System Reset Synchronization

Legacy Peripheral Interface Enable

Use Scenario: Generating a synchronized system reset pulse only when eight status conditions are met.

IC Role / Device Role / Timing Role: NAND gate functions as an 8-term safety interlock, asserting reset when all monitored signals are valid.

Use Value: Ensures fail-safe startup sequencing without external microcontroller intervention.

Use Scenario: Enabling legacy ISA or parallel port peripherals only when all handshake and configuration signals align.

IC Role / Device Role / Timing Role: Acts as final hardware-level enable gate before data transfer begins.

Use Value: Prevents spurious writes by requiring full 8-signal readiness before activation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-input NAND gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALS30N	Identical logic function, same PDIP-14 package, identical AC/DC specs per TI datasheet Rev B (1996); minor packaging marking variance.	No functional or layout impact; validated in same legacy computer backplane designs.	Direct second-source option with identical sourcing and qualification history.
74F30PC	Fast TTL variant: faster t_PLH/t_PHL (3.5/3.5 ns), higher I_OL (20 mA), but higher ICC (16 mA) and stricter V_CC tolerance (4.75–5.25 V).	Requires updated power rail filtering and may overload legacy fan-out budgets if replacing multiple ALS devices.	Preferred where speed > 8 ns is mandatory and power budget allows.

Compared with SN74ALS30N and 74F30PC, the DM74ALS30AN offers optimal balance of speed, power efficiency (ICC < 1 mA), and broad V_CC tolerance for cost-sensitive commercial systems, while maintaining full pin and functional compatibility with established 74ALS designs.

Availability

DM74ALS30AN is available at Aetrix Electronics and suitable for memory decoding, bus control, and system reset synchronization requiring stable component supply and long-term obsolescence management.

Supply support for DM74ALS30AN 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 designer and manufacturer of analog and mixed-signal semiconductors, acquired by ON Semiconductor in 2016; its legacy TTL logic portfolio remains widely deployed.

The DM74ALS30AN belongs to the 74ALS (Advanced Low-Power Schottky) logic family, engineered for improved speed-power trade-offs in commercial-grade digital systems where reliability and pin compatibility outweigh ultra-high frequency demands.

FAQ

What logic function does the DM74ALS30AN implement?

The DM74ALS30AN implements a single 8-input NAND gate: output Y is LOW only when all eight inputs (A–H) are HIGH; otherwise, Y is HIGH. This Boolean function-Y = NOT(A·B·C·D·E·F·G·H)-is fully specified in the truth table of the Fairchild DS006189 datasheet. The DM74ALS30AN performs this function using oxide-isolated Schottky TTL technology, ensuring compatibility with standard TTL voltage thresholds and loading rules.

Is the DM74ALS30AN pin-compatible with other 74-series 8-input NAND gates?

Yes, the DM74ALS30AN is pin-for-pin compatible with the 74S30 and 74LS30 in the same 14-lead PDIP package. All share identical pin assignments: inputs on pins 1–8, GND on pin 9, output Y on pin 10, and V_CC on pin 14. This allows direct substitution in legacy designs without PCB modification, provided timing and drive requirements remain within ALS specifications.

What is the maximum capacitive load the DM74ALS30AN can drive while meeting timing specs?

The DM74ALS30AN's switching characteristics-including t_PLH and t_PHL-are guaranteed up to 50 pF total load capacitance, as tested per the DS006189 datasheet. Exceeding 50 pF will increase propagation delay nonlinearly and may violate setup/hold margins in synchronous systems. For heavier loads, buffer stages or lower-capacitance routing should be used alongside the DM74ALS30AN.

Does the DM74ALS30AN support mixed-voltage interfacing, such as 3.3 V logic inputs?

No, the DM74ALS30AN is a 5 V-only TTL device with V_IL = 0.8 V and V_IH = 2.0 V thresholds. It is not designed for direct 3.3 V logic interfacing: a 3.3 V HIGH signal may fall below the 2.0 V V_IH minimum and register as indeterminate or LOW. Level-shifting circuitry or a 3.3 V–tolerant logic family (e.g., 74LVC) is required when interfacing with 3.3 V systems using the DM74ALS30AN.

What is the thermal resistance (θ_JA) of the DM74ALS30AN in its PDIP package?

Per the Fairchild DS006189 datasheet, the DM74ALS30AN in the N14A (PDIP-14) package has a typical junction-to-ambient thermal resistance (θ_JA) of 86.5°C/W. This value assumes standard mounting on a FR-4 PCB with no copper pour; actual thermal performance depends on board layout, airflow, and adjacent heat sources. It enables safe operation up to +70°C ambient when power dissipation remains below ~115 mW.

DM74ALS30AN Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74ALS

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: NAND Gate

Number of Circuits:: 1

Number of Inputs:: 8

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:: 12ns @ 5V, 50pF

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-MDIP

DM74ALS30AN FAQ

1.How can I place an order for DM74ALS30AN through Aetrix?

Please submit a Request for Quotation (RFQ) for DM74ALS30AN 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 DM74ALS30AN reliable?

The price and inventory of DM74ALS30AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS30AN is usually 5 days.

3.What payment methods are accepted for DM74ALS30AN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS30AN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DM74ALS30AN?

DM74ALS30AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DM74ALS30AN 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 DM74ALS30AN?

For technical support, including DM74ALS30AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS30AN requirements.

6.How does Aetrix verify that DM74ALS30AN is sourced from the original manufacturer or authorized distributors?

All DM74ALS30AN 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 DM74ALS30AN meets industry standards.

7.What is the process for return or replacement of DM74ALS30AN?

All DM74ALS30AN units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS30AN, 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 DM74ALS30AN part is unused and in its original packaging.

Return procedure for DM74ALS30AN:

1.Submit a request within 90 days.

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

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