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

onsemi MC74HC03AFELG

Name: MC74HC03AFELG
Brand: onsemi
SKU: MC74HC03AFELG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74HC03AFELG

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: MC74HC03AFELG.pdf

Description:: IC GATE NAND 4CH 2-INP SOEIAJ-14

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Product details

Overview

MC74HC03AFELG from onsemi is a quad 2-input NAND gate with open-drain outputs, implemented in high-performance silicon-gate CMOS technology. It features four independent NAND logic functions, each with an N-channel MOS transistor output stage capable of sinking up to 25 mA per pin at V_CC = 6.0 V, operates across 2.0–6.0 V supply range, and supports wired-AND configurations using external pullup resistors - commonly used in LED driver circuits and level-shifting interfaces.

For engineers reviewing the MC74HC03AFELG datasheet, pinout, applications, or equivalent options, key selection considerations include its open-drain output architecture, compatibility with LSTTL/CMOS inputs, −40°C to +125°C operating temperature range, propagation delay as low as 20 ns at V_CC = 6.0 V, and SOIC-14 package footprint.

Technical Context

The MC74HC03AFELG implements four independent 2-input NAND gates, each with an open-drain N-channel output stage that requires an external pullup resistor for logic-high assertion. Its input structure is compatible with both standard CMOS and LSTTL outputs (with pullup), enabling mixed-logic interfacing without level translators.

Each output delivers guaranteed sink current of 2.4 mA at V_OL ≤ 0.1 V (V_CC = 2.0 V) and up to 5.2 mA at V_OL ≤ 0.4 V (V_CC = 6.0 V), with propagation delays ranging from 20 ns (V_CC = 6.0 V) to 180 ns (V_CC = 2.0 V). The device meets JEDEC Standard No. 7A and supports AEC-Q100 qualification when ordered with −Q suffix.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input NAND with open-drain outputs - enables wired-AND bus structures and active-low LED driving
Supply Voltage Range	2.0 V to 6.0 V - supports dual-supply systems and battery-powered designs down to 2 V
Output Sink Current	25 mA max per pin - sufficient to drive LEDs directly or interface with TTL loads via pullup
Propagation Delay	20 ns typical at V_CC = 6.0 V - ensures timing-critical combinational logic performance
Input Leakage Current	±0.1 µA max at V_CC = 6.0 V - minimizes power loss in high-impedance or battery-sensitive nodes
Operating Temperature	−55°C to +125°C - qualified for industrial and automotive under-hood applications
ESD Rating	>2000 V HBM - provides robust handling during PCB assembly and system integration

Pinout & Package

MC74HC03AFELG is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, case 751A, with 1.27 mm pitch and standard JEDEC-compliant footprint. Pin 1 is marked by a notch or beveled corner; pin 7 is GND and pin 14 is V_CC.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 9, 12	Input A (NAND gate 1–4)	Active-high logic input; compatible with CMOS and LSTTL (with pullup)
2, 5, 10, 13	Input B (NAND gate 1–4)	Second active-high logic input per gate; unused inputs must be tied to V_CC or GND
3, 6, 8, 11	Open-Drain Output Y (NAND gate 1–4)	Sinks current only; requires external pullup for HIGH logic level; supports wired-AND
7	GND	Ground reference for all inputs, outputs, and internal circuitry
14	V_CC	Positive supply rail; must be decoupled locally with 0.1 µF ceramic capacitor

Key Features

Feature	Design Value
Open-drain output architecture	Enables wired-AND bus topologies and flexible voltage-level translation without additional transistors
10 LSTTL load drive capability	Supports direct interface to legacy TTL logic families using a single 1 kΩ pullup resistor
High noise immunity	CMOS input threshold ratios (VIH/VIL) ensure reliable operation in electrically noisy industrial environments
Pb-free, RoHS-compliant packaging	Meets global environmental compliance requirements including halogen-free and BFR-free construction
AEC-Q100 qualification option	Available with −Q suffix for automotive applications requiring PPAP documentation and controlled change management

Applications

LED Driver Interface	Wired-AND Bus Logic
Use Scenario: Driving multiple indicator LEDs from microcontroller GPIO pins with active-low enable control. IC Role / Device Role / Timing Role: Open-drain NAND gate acts as current-sinking switch; each output controls one LED cathode while anodes connect to V_CC via current-limiting resistor. Use Value: Eliminates need for discrete NPN transistors; supports simultaneous multi-LED activation with shared pullup and precise current control up to 25 mA per channel.	Use Scenario: Implementing interrupt arbitration or status aggregation across multiple subsystems on a shared bus line. IC Role / Device Role / Timing Role: Each NAND output connects to common wired-AND line; any gate asserting LOW pulls entire bus LOW - used for priority-based interrupt signaling. Use Value: Enables hardware-level OR logic without additional logic gates; supports real-time fault detection and system-wide alert generation with sub-20 ns response latency.
Level-Shifting Interface	Legacy TTL-to-CMOS Translation
Use Scenario: Interfacing a 3.3 V microcontroller to a 5 V sensor module requiring active-low handshake signals. IC Role / Device Role / Timing Role: MC74HC03AFELG accepts 3.3 V CMOS inputs and sinks current into 5 V pullup, generating valid 5 V logic levels at its open-drain outputs. Use Value: Provides bidirectional voltage translation without direction control lines; maintains signal integrity across supply domains with no added propagation delay penalty.	Use Scenario: Replacing obsolete 74LS03 in industrial control panels where board space and power efficiency are constrained. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for LS03; identical pinout and wired-AND functionality but with lower ICC (≤40 µA) and wider V_CC range. Use Value: Reduces system power consumption by >90% versus LS03 while maintaining full functional and layout compatibility - simplifies legacy design refresh.

LED Driver Interface

Wired-AND Bus Logic

Use Scenario: Driving multiple indicator LEDs from microcontroller GPIO pins with active-low enable control.

IC Role / Device Role / Timing Role: Open-drain NAND gate acts as current-sinking switch; each output controls one LED cathode while anodes connect to V_CC via current-limiting resistor.

Use Value: Eliminates need for discrete NPN transistors; supports simultaneous multi-LED activation with shared pullup and precise current control up to 25 mA per channel.

Use Scenario: Implementing interrupt arbitration or status aggregation across multiple subsystems on a shared bus line.

IC Role / Device Role / Timing Role: Each NAND output connects to common wired-AND line; any gate asserting LOW pulls entire bus LOW - used for priority-based interrupt signaling.

Use Value: Enables hardware-level OR logic without additional logic gates; supports real-time fault detection and system-wide alert generation with sub-20 ns response latency.

Level-Shifting Interface

Legacy TTL-to-CMOS Translation

Use Scenario: Interfacing a 3.3 V microcontroller to a 5 V sensor module requiring active-low handshake signals.

IC Role / Device Role / Timing Role: MC74HC03AFELG accepts 3.3 V CMOS inputs and sinks current into 5 V pullup, generating valid 5 V logic levels at its open-drain outputs.

Use Value: Provides bidirectional voltage translation without direction control lines; maintains signal integrity across supply domains with no added propagation delay penalty.

Use Scenario: Replacing obsolete 74LS03 in industrial control panels where board space and power efficiency are constrained.

IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for LS03; identical pinout and wired-AND functionality but with lower ICC (≤40 µA) and wider V_CC range.

Use Value: Reduces system power consumption by >90% versus LS03 while maintaining full functional and layout compatibility - simplifies legacy design refresh.

Equivalent & Alternatives

The following parts are listed as comparable options for similar open-drain NAND gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC03DR	Same logic function and open-drain outputs; SOIC-14 package; TI-specified V_CC range 2.0–6.0 V and I_OUT = ±25 mA, but AC specs differ slightly (t_PLZ = 23 ns min at V_CC = 6 V vs. onsemi's 20 ns)	Valid for general-purpose wired-AND and LED driving, but not AEC-Q100 qualified; lacks −Q automotive variant	Select when sourcing from TI distribution channels or when AEC-Q100 is not required; verify timing margins in high-speed bus applications.
74VHC03M	Pin-compatible open-drain NAND; higher speed (t_PLZ = 16 ns typ at V_CC = 5 V); lower I_IN (±0.1 µA), but narrower V_CC range (2.0–5.5 V) and no AEC-Q100 option	Better suited for high-frequency clocked logic or portable devices with 5 V rails; unsuitable for 6 V systems or automotive deployment	Choose for speed-critical non-automotive designs where 6 V operation is unnecessary and tighter propagation delay is prioritized.

Compared with SN74HC03DR and 74VHC03M, MC74HC03AFELG offers the widest supply range (2.0–6.0 V), AEC-Q100 qualification path, and lowest quiescent current (1.0 µA typical), making it optimal for automotive, industrial, and battery-backed systems requiring long-term reliability and broad voltage tolerance.

Availability

MC74HC03AFELG is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, LED signage controllers, and legacy logic upgrades requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MC74HC03AFELG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

The MC74HC03AFELG belongs to the HC logic family designed for high-noise-immunity, low-power, pin-compatible replacements of legacy TTL devices - targeting cost-sensitive, reliability-critical embedded systems where supply flexibility and long-term manufacturability matter.

FAQ

What is the maximum sink current per output of the MC74HC03AFELG?

The MC74HC03AFELG guarantees a minimum sink current of 2.4 mA at V_OL ≤ 0.1 V with V_CC = 2.0 V, and up to 5.2 mA at V_OL ≤ 0.4 V with V_CC = 6.0 V. Absolute maximum rating is ±25 mA per output pin, verified across −55°C to +125°C operating range per onsemi datasheet Rev. 14.

Is the MC74HC03AFELG pin-compatible with the 74LS03?

Yes, the MC74HC03AFELG is explicitly designed to be identical in pinout to the 74LS03, as confirmed in the onsemi datasheet: "The MC74HC03A is identical in pinout to the LS03." This enables direct replacement in existing SOIC-14 layouts without PCB modification, preserving wiring and footprint integrity.

Does the MC74HC03AFELG support wired-AND functionality?

Yes - all four outputs of the MC74HC03AFELG are open-drain, allowing multiple outputs to be tied together with a single pullup resistor to implement wired-AND logic. This is validated in Figure 6 of the datasheet and supported by the device's output characteristic curves showing monotonic sink behavior up to 25 mA.

What is the operating temperature range for the MC74HC03AFELG?

The MC74HC03AFELG is rated for operation from −55°C to +125°C, as specified in the Recommended Operating Conditions table. This extended range supports deployment in under-hood automotive modules, industrial motor drives, and outdoor equipment where ambient thermal stress exceeds commercial-grade limits.

Can the MC74HC03AFELG drive LEDs directly?

Yes - the MC74HC03AFELG can drive LEDs directly using its open-drain outputs. Figure 7 in the datasheet provides a validated design example: with V_CC = 5 V, VF = 1.7 V, and desired ID = 10 mA, a 270 Ω pullup resistor yields V_DS ≈ 0.4 V, confirming safe and efficient LED sinking operation within absolute maximum ratings.

MC74HC03AFELG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HC

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: NAND Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: Open Drain

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 1 µA

Current - Output High, Low:: -, 5.2mA

Input Logic Level - Low:: 0.5V ~ 1.8V

Input Logic Level - High:: 1.5V ~ 4.2V

Max Propagation Delay @ V, Max CL:: 20ns @ 6V, 50pF

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOEIAJ-14

MC74HC03AFELG FAQ

1.How can I place an order for MC74HC03AFELG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74HC03AFELG 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 MC74HC03AFELG reliable?

The price and inventory of MC74HC03AFELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC03AFELG is usually 5 days.

3.What payment methods are accepted for MC74HC03AFELG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC03AFELG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74HC03AFELG?

MC74HC03AFELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74HC03AFELG 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 MC74HC03AFELG?

For technical support, including MC74HC03AFELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC03AFELG requirements.

6.How does Aetrix verify that MC74HC03AFELG is sourced from the original manufacturer or authorized distributors?

All MC74HC03AFELG 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 MC74HC03AFELG meets industry standards.

7.What is the process for return or replacement of MC74HC03AFELG?

All MC74HC03AFELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC03AFELG, 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 MC74HC03AFELG part is unused and in its original packaging.

Return procedure for MC74HC03AFELG:

1.Submit a request within 90 days.

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

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