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onsemi MC74HC03AFEL
- Part No.:
- MC74HC03AFEL
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC03AFEL.pdf
- Description:
- IC GATE NAND 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
MC74HC03AFEL from onsemi is a quad 2-input NAND gate with open-drain outputs, fabricated in high-performance silicon-gate CMOS technology. It operates from 2.0 V to 6.0 V, delivers sinking output current up to ±25 mA per pin, supports wired-AND logic implementation with external pullup resistors, and is pinout-compatible with LS03 for legacy TTL system upgrades.
For engineers reviewing the MC74HC03AFEL datasheet, pinout, applications, or equivalent options, this device is selected for level-shifted logic interfacing, LED driving with blanking control, and multi-source bus arbitration where high noise immunity, low input current (±0.1 µA), and guaranteed open-drain sink capability at 125°C are required.
Technical Context
The MC74HC03AFEL implements four independent NAND gates, each with an N-channel MOS open-drain output stage-no internal pullup-requiring external resistors for logic-high assertion. Its inputs accept standard CMOS and LSTTL-compatible voltage levels, with VIH ≥ 3.15 V and VIL ≤ 1.35 V at VCC = 4.5 V.
Propagation delay is specified at 24 ns (max) at VCC = 4.5 V under CL = 50 pF load; output transition time is 15 ns (max) under same conditions. The device features high-impedance three-state leakage < ±5.0 µA and input capacitance ≤ 10 pF, enabling stable operation in mixed-voltage digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NAND with open-drain outputs - enables wired-AND bus topology and level translation |
| Supply Voltage Range | 2.0 V to 6.0 V - supports dual-supply interface between 3.3 V and 5 V domains |
| Output Sink Current | ±25 mA per pin - drives LEDs directly or interfaces with higher-current loads via external pullup |
| Propagation Delay | 24 ns max at VCC = 4.5 V, CL = 50 pF - ensures timing compatibility with 74LS/HC logic families |
| Input Leakage Current | ±0.1 µA max at VCC = 6.0 V - minimizes static power draw and prevents unintended logic transitions |
| Operating Temperature | –55 °C to +125 °C - qualified for industrial and automotive under-hood environments |
| Package Type | SOEIAJ-14 (JEDEC MS-012 variant) - surface-mount, 150 mil body width, tape-and-reel compatible |
Pinout & Package
MC74HC03AFEL is housed in a 14-lead SOEIAJ (small-outline EIAJ) package - identical in footprint and lead pitch to SOIC-14 but with gull-wing leads conforming to JEDEC MO-153. Pin 1 is marked by a beveled corner; Pin 7 is GND; Pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | Input A1–A4 | First input of each NAND gate - accepts CMOS/LSTTL logic levels; must be tied to VCC or GND if unused |
| 2, 5, 10, 13 | Input B1–B4 | Second input of each NAND gate - electrically identical to A pins; no internal pullup |
| 3, 6, 8, 11 | Output Y1–Y4* | Open-drain N-channel output - sinks current only; requires external pullup for HIGH logic assertion |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry - must be low-impedance connection |
| 14 | VCC | Positive supply rail - decoupling capacitor (0.1 µF) recommended within 10 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Wired-AND Bus Compatibility | Four independent open-drain outputs allow direct connection to shared bus lines with single external pullup |
| LSTTL Load Drive | Sinks 10 LSTTL loads with suitable pullup resistor - eliminates need for buffer stages in legacy interface designs |
| High Noise Immunity | CMOS input structure provides >40% VCC noise margin - robust against EMI in industrial control panels |
| Pb-Free Packaging | RoHS-compliant SOEIAJ-14 package (FEL suffix) - meets IPC/JEDEC J-STD-020 reflow profile requirements |
| Wide Temperature Operation | Specified performance from –55 °C to +125 °C - validated for use in motor control and power supply monitoring |
Applications
| Industrial PLC I/O Expansion | LED Matrix Blanking Control |
|---|---|
|
Use Scenario: Adding isolated digital output channels to programmable logic controller backplanes using shared 24 V bus wiring. IC Role / Device Role / Timing Role: Open-drain NAND gates act as current-sinking switches that enable/discharge LED or relay driver transistors on command. Use Value: Eliminates discrete transistor buffers; leverages built-in logic to reduce component count while maintaining 125 °C operational reliability. |
Use Scenario: Driving multiplexed 7-segment displays where row/column blanking must be synchronized with digit enable signals. IC Role / Device Role / Timing Role: NAND gate outputs sink cathode current during active display cycles; blanking controlled via inverted enable logic. Use Value: Achieves precise 10 mA LED sink per segment without external drivers; propagation delay < 24 ns ensures flicker-free scanning at 1 kHz. |
| Legacy TTL-to-CMOS Level Translation | Multi-Source Bus Arbitration |
|
Use Scenario: Interfacing 5 V LSTTL microcontrollers with 3.3 V CMOS peripherals in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Acts as bidirectional level shifter when used with pullup to 3.3 V; inputs tolerate 5 V, outputs drive 3.3 V logic thresholds. Use Value: No external level-shifting ICs needed; VIH/VIL margins exceed JEDEC 7A requirements across full temperature range. |
Use Scenario: Coordinating access to shared serial bus (e.g., I²C-like control line) among multiple microcontrollers in distributed sensor nodes. IC Role / Device Role / Timing Role: Each node uses one NAND gate output tied to common bus; wired-AND behavior enforces priority-based arbitration. Use Value: Hardware-implemented arbitration avoids software race conditions; open-drain structure prevents bus contention damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NAND gate with open-drain applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC03DR | Same logic function and open-drain architecture; SOIC-14 package (not SOEIAJ); slightly higher ICC (10 µA vs. 1.0 µA typical) | Compatible for board-level replacement where footprint matches; not drop-in for MC74HC03AFEL's narrower SOEIAJ leadform | Select when SOIC-14 layout exists and Pb-free compliance is secondary to cost |
| 74LVC03PW | Lower VCC range (1.65–5.5 V); higher speed (tPD = 4.2 ns typ); push-pull option available; different input threshold specs | Better suited for high-speed 3.3 V systems; lacks guaranteed 125 °C operation and LSTTL load compatibility | Choose for new 3.3 V designs requiring sub-5 ns timing; avoid in industrial temp or legacy TTL interface contexts |
Compared with SN74HC03DR and 74LVC03PW, the MC74HC03AFEL uniquely combines SOEIAJ packaging, –55 °C to +125 °C qualification, LSTTL load compatibility, and 1.0 µA typical ICC - making it optimal for space-constrained industrial controllers needing long-term thermal stability and legacy interoperability.
Availability
MC74HC03AFEL is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, LED matrix blanking control, and legacy TTL-to-CMOS level translation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74HC03AFEL 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 electronics, delivering silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74HC03AFEL belongs to the 74HC logic family - designed for high-speed, low-power CMOS operation in mixed-signal systems where noise immunity, wide supply range, and interoperability with legacy TTL are critical.
FAQ
What is the maximum sink current per output pin of the MC74HC03AFEL?
The MC74HC03AFEL specifies a maximum DC output current of ±25 mA per pin under steady-state conditions. This rating applies to each of its four open-drain outputs (Y1–Y4) when sinking current into a properly biased external pullup network. Exceeding this limit risks parametric shift or long-term reliability degradation, especially above 85 °C.
Does the MC74HC03AFEL support operation at 3.3 V supply voltage?
Yes, the MC74HC03AFEL is fully specified for operation at 3.3 V, falling within its guaranteed 2.0 V to 6.0 V supply range. At VCC = 3.3 V, input thresholds (VIH ≥ 2.31 V, VIL ≤ 1.00 V) and propagation delay (≤30 ns max) remain valid across –55 °C to +125 °C, enabling reliable use in mixed-voltage 3.3 V/5 V systems.
Can unused inputs on the MC74HC03AFEL be left floating?
No - unused inputs on the MC74HC03AFEL must be tied to a defined logic level (VCC or GND) to prevent oscillation, excessive current draw, or unpredictable output states. Floating CMOS inputs exhibit high impedance and susceptibility to noise, which can cause dynamic power dissipation and potential latch-up in worst-case scenarios.
Is the MC74HC03AFEL pinout compatible with the 74LS03?
Yes, the MC74HC03AFEL is explicitly stated to be identical in pinout to the 74LS03. All 14 pins - including VCC (14), GND (7), inputs A1–A4 (1,4,9,12), B1–B4 (2,5,10,13), and open-drain outputs Y1–Y4 (3,6,8,11) - match the LS03 layout, enabling direct PCB replacement in legacy TTL designs with appropriate pullup resistor adjustment.
What package type does the MC74HC03AFEL use, and how does it differ from SOIC-14?
The MC74HC03AFEL uses the SOEIAJ-14 package - a JEDEC MO-153 compliant variant of SOIC with identical 1.27 mm lead pitch and 8.65 mm body width, but featuring shorter gull-wing leads optimized for Japanese domestic assembly standards. Unlike standard SOIC-14, SOEIAJ has tighter lead coplanarity and distinct mold compound dimensions, requiring specific stencil and reflow profiles.
MC74HC03AFEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 14-SOIC
MC74HC03AFEL FAQ
1.How can I place an order for MC74HC03AFEL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC03AFEL 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 MC74HC03AFEL reliable?
The price and inventory of MC74HC03AFEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC03AFEL is usually 5 days.
3.What payment methods are accepted for MC74HC03AFEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC03AFEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC03AFEL?
MC74HC03AFEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC03AFEL 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 MC74HC03AFEL?
For technical support, including MC74HC03AFEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC03AFEL requirements.
6.How does Aetrix verify that MC74HC03AFEL is sourced from the original manufacturer or authorized distributors?
All MC74HC03AFEL 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 MC74HC03AFEL meets industry standards.
7.What is the process for return or replacement of MC74HC03AFEL?
All MC74HC03AFEL units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC03AFEL, 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 MC74HC03AFEL part is unused and in its original packaging.
Return procedure for MC74HC03AFEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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