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onsemi MC74HC03AFL2
- Part No.:
- MC74HC03AFL2
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC03AFL2.pdf
- Description:
- IC GATE NAND 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
MC74HC03AFL2 from onsemi is a quad 2-input NAND gate IC with open-drain outputs, pin-compatible with LS03 and designed for wired-AND logic, LED sinking, and LSTTL-load interfacing. It operates from 2V to 6V, delivers 10 LSTTL loads with pullup, and features low input current (1 µA) and high noise immunity.
For engineers reviewing the MC74HC03AFL2 datasheet, pinout, applications, or equivalent options, key selection criteria include open-drain output behavior, sink-current capability (≤25 mA per output), JEDEC Std. 7A compliance, and compatibility with CMOS/NMOS/TTL inputs using external pullups.
Technical Context
The MC74HC03AFL2 implements four independent 2-input NAND gates, each with an N-channel open-drain MOSFET output stage-no internal pullup. Its logic function is Y = A·B with high-impedance (Hi-Z) when inactive, requiring external pullup resistors for wired-AND or level translation.
It supports wide VCC operation (2–6 V), exhibits propagation delays as low as 20 ns at 6 V (CL = 50 pF), and maintains guaranteed VOL ≤ 0.4 V at IOUT = 5.2 mA. Input thresholds scale with VCC (VIH ≥ 70% VCC, VIL ≤ 30% VCC), ensuring robust noise margins across supply voltages.
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 sinking only |
| Supply Voltage Range | 2.0 V to 6.0 V - supports dual-supply systems and battery-powered logic interfaces |
| Output Sink Current | ±25 mA per pin - sufficient for direct LED driving or driving 10 LSTTL loads with appropriate pullup |
| Propagation Delay | 20 ns max at VCC = 6 V (CL = 50 pF) - enables use in medium-speed digital control and timing circuits |
| Input Leakage Current | ±1.0 µA max at TA ≤ 85°C - minimizes power loss in high-impedance input networks and battery-critical designs |
| Operating Temperature | –55°C to +125°C - qualified for automotive under-hood, industrial control, and extended-environment applications |
| JEDEC Compliance | JESD7A - ensures interoperability with industry-standard TTL/CMOS logic families and test protocols |
Pinout & Package
MC74HC03AFL2 is supplied in SOIC–EIAJ 14-pin package (Case 940A–03), 3.9 mm wide body, 1.27 mm pitch, with standard pin 1 indicator and GND (pin 7) / VCC (pin 14) placement matching industry-wide HC logic conventions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 9, 10, 12, 13 | NAND Input (A1/B1/A2/B2/A3/B3/A4/B4) | Dual inputs per gate - must be tied to defined logic levels; floating inputs cause undefined output and increased power |
| 3, 6, 8, 11 | Open-Drain Output (Y1/Y2/Y3/Y4) | Sinks current only - requires external pullup resistor for HIGH logic; enables wired-AND, level shifting, and bus arbitration |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry - mandatory low-impedance connection |
| 14 | VCC | Positive supply rail - must be decoupled locally (0.1 µF ceramic) to suppress switching noise and ensure stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain output architecture | Enables wired-AND bus topologies without external diodes; supports mixed-voltage interface via pullup to different rail |
| 10 LSTTL load drive capability | Validated sink performance with external pullup - eliminates need for buffer stages in legacy TTL system upgrades |
| High noise immunity | CMOS input thresholds (VIH/VIL ratio ≥ 2.3:1 at VCC = 5 V) reject >1.5 V of common-mode noise on signal lines |
| Low quiescent ICC | ≤40 µA max at VCC = 6 V - reduces standby power in always-on control logic and sensor interface modules |
| JEDEC Std. 7A compliance | Guarantees interoperability with standardized CMOS/TTL logic families and automated test equipment interfaces |
Applications
| Industrial Control Logic | LED Status Indication |
|---|---|
Use Scenario: Discrete safety interlock monitoring in PLC I/O modules where multiple sensors feed into a shared fault-bus line. IC Role / Device Role / Timing Role: Each MC74HC03AFL2 gate sinks its sensor's fault signal; wired-AND bus pulls LOW if any sensor asserts fault. Use Value: Eliminates discrete diode-OR network and reduces component count by 60% versus discrete transistor solutions. | Use Scenario: Multi-color status LED driver in medical device front panel with shared anode configuration. IC Role / Device Role / Timing Role: MC74HC03AFL2 outputs sink cathodes of red/green/blue LEDs; microcontroller drives inputs to select color combinations. Use Value: Direct 10 mA sink capability enables single-gate LED drive without external transistors - simplifies layout and improves reliability. |
| Legacy TTL System Interface | Level Translation Interface |
Use Scenario: Interfacing modern 3.3 V microcontrollers to legacy 5 V LSTTL peripherals (e.g., EPROMs, address latches). IC Role / Device Role / Timing Role: MC74HC03AFL2 acts as logic-level translator and bus driver - inputs accept 3.3 V CMOS, outputs sink 5 V LSTTL loads. Use Value: Achieves bidirectional compatibility without level-shifter ICs; pullup to 5 V enables full LSTTL fanout while preserving MCU GPIO voltage limits. | Use Scenario: Isolating 1.8 V FPGA I/O banks from 3.3 V sensor bus with open-drain signaling (e.g., I²C SDA/SCL extension). IC Role / Device Role / Timing Role: MC74HC03AFL2 provides unidirectional sinking path - FPGA drives inputs, 3.3 V pullup defines HIGH level on sensor side. Use Value: Enables safe voltage-domain crossing with <10 ns added delay - avoids timing violations in high-speed sensor readout paths. |
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 |
|---|---|---|---|
| SN74LVC03APWR | 3.3 V only (1.65–3.6 V), lower VOL (0.55 V @ 24 mA), higher speed (tPD = 3.7 ns typ) | Not suitable for 5 V systems or wired-AND buses pulling to >3.6 V; optimized for low-voltage portable logic | Select when operating exclusively at 3.3 V and sub-5 ns timing is required; verify pullup voltage compatibility |
| 74AHC03PW,118 | Wider VCC range (2–5.5 V), higher sink current (±8 mA @ VOL = 0.33 V), smaller TSSOP14 package (4.4 × 5.0 mm) | Lower drive strength limits LED brightness and LSTTL loading; not rated for 125°C operation | Prefer for space-constrained consumer electronics where 125°C rating is unnecessary and 5.5 V max suffices |
Compared with SN74LVC03APWR and 74AHC03PW,118, the MC74HC03AFL2 uniquely supports full 2–6 V operation, 125°C extended temperature, and verified 10-LSTTL sink drive - making it the only choice for industrial-grade wired-AND bus design across mixed-voltage legacy systems.
Availability
MC74HC03AFL2 is available at Aetrix Electronics and suitable for industrial control logic, LED status indication, legacy TTL system interface, level translation interface, and safety interlock monitoring requiring stable component supply over extended temperature and long product lifecycles.
Supply support for MC74HC03AFL2 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74HC03AFL2 belongs to the high-performance HC logic family, engineered for pin-compatible replacement of bipolar TTL in cost-sensitive, thermally demanding, and mixed-voltage digital systems.
FAQ
What is the maximum sink current per output of the MC74HC03AFL2?
The MC74HC03AFL2 guarantees ±25 mA DC output current per pin under maximum ratings. In normal operation with VCC = 5 V and TA ≤ 85°C, it delivers up to 5.2 mA while maintaining VOL ≤ 0.4 V - sufficient for driving LEDs or 10 LSTTL loads with a suitable external pullup resistor. Exceeding recommended conditions risks parametric shift or latch-up.
Does the MC74HC03AFL2 have internal pullup resistors on its outputs?
No, the MC74HC03AFL2 does not include internal pullup resistors. Its outputs are true open-drain N-channel MOSFETs requiring external pullup resistors to define the HIGH logic state. This architecture enables wired-AND functionality, level translation, and bus arbitration - but leaves pullup selection (value, voltage rail) entirely to the system designer.
Can the MC74HC03AFL2 operate at 1.8 V supply voltage?
No, the MC74HC03AFL2 is not specified for 1.8 V operation. Its recommended operating range is 2.0 V to 6.0 V per JEDEC Std. 7A. At 1.8 V, input thresholds become undefined, propagation delay increases significantly, and output drive capability degrades below specification - risking functional failure. For 1.8 V systems, consider LVC or AHC logic families instead.
Is the MC74HC03AFL2 pin-compatible with the standard 74HC03?
Yes, the MC74HC03AFL2 is fully pin-compatible with the generic 74HC03 and identical in pinout to the TTL LS03. All 14 pins - including VCC (14), GND (7), and the four NAND gate inputs/outputs - match the industry-standard arrangement. This allows drop-in replacement in existing PCB layouts designed for HC or LS logic, provided voltage and timing requirements align.
What package type is used for the MC74HC03AFL2?
The MC74HC03AFL2 uses the SOIC–EIAJ 14-pin package (Case Outline 940A–03), measuring 3.9 mm wide with 1.27 mm lead pitch. It is distinct from standard SOIC–14 (751A–03) and features EIAJ-compliant dimensions - verified in the official onsemi package drawing for suffix "F". This variant supports tape-and-reel delivery (2000 units per reel) and is marked "HC03A" with date code.
MC74HC03AFL2 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
MC74HC03AFL2 FAQ
1.How can I place an order for MC74HC03AFL2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC03AFL2 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 MC74HC03AFL2 reliable?
The price and inventory of MC74HC03AFL2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC03AFL2 is usually 5 days.
3.What payment methods are accepted for MC74HC03AFL2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC03AFL2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC03AFL2?
MC74HC03AFL2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC03AFL2 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 MC74HC03AFL2?
For technical support, including MC74HC03AFL2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC03AFL2 requirements.
6.How does Aetrix verify that MC74HC03AFL2 is sourced from the original manufacturer or authorized distributors?
All MC74HC03AFL2 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 MC74HC03AFL2 meets industry standards.
7.What is the process for return or replacement of MC74HC03AFL2?
All MC74HC03AFL2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC03AFL2, 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 MC74HC03AFL2 part is unused and in its original packaging.
Return procedure for MC74HC03AFL2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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