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onsemi MC74HC02AFL2
- Part No.:
- MC74HC02AFL2
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC02AFL2.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
MC74HC02AFL2 from onsemi is a quad 2-input NOR gate IC in SOIC-14 (EIAJ) package, operating from 2.0 V to 6.0 V, delivering 10 LSTTL load drive capability with ≤1.0 µA input current and high noise immunity. It serves as a logic-level combinatorial gate in digital control subsystems, such as industrial sequencers and embedded power management state machines.
For engineers reviewing the MC74HC02AFL2 datasheet, pinout, applications, or equivalent options, key selection considerations include its JEDEC Std. 7A compliance, guaranteed propagation delay of 13 ns at 6.0 V (CL = 50 pF), direct interface compatibility with CMOS/NMOS/TTL, and support for –55 °C to +125 °C operation across all package variants.
Technical Context
The MC74HC02AFL2 implements four independent 2-input NOR gates using high-performance silicon-gate CMOS technology. Each gate features symmetrical input thresholds (VIH = 1.5 V min at VCC = 2.0 V; VIL = 0.5 V max), rail-to-rail output swing (VOH ≥ 5.9 V, VOL ≤ 0.26 V at VCC = 6.0 V, IOUT = 2.4 mA), and low quiescent ICC (≤40 µA at 125 °C).
It is pinout-compatible with TTL LS02 and supports mixed-voltage interfacing via pull-up resistors for LSTTL inputs. Input capacitance is limited to 10 pF, and propagation delays are characterized across –55 °C to +125 °C with CL = 50 pF and input rise/fall times ≤6 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR gate - enables compact implementation of negative-logic OR/NOT combinations in control logic |
| Supply Voltage Range | 2.0 V to 6.0 V - supports single-supply operation across 3.3 V and 5 V systems without level shifters |
| Propagation Delay | 13 ns max at VCC = 6.0 V (CL = 50 pF) - ensures timing predictability in synchronous digital state machines |
| Output Drive | 10 LSTTL loads - sufficient to directly drive legacy TTL inputs without buffering |
| Input Leakage Current | ±1.0 µA max at 125 °C - maintains stable logic states in low-power hold modes |
| Operating Temperature | –55 °C to +125 °C - qualified for under-hood automotive, industrial motor control, and outdoor equipment |
| ESD Protection | Integrated protection circuitry - guards against human-body-model (HBM) discharge per JEDEC Std. 7A |
Pinout & Package
MC74HC02AFL2 is supplied in SOIC-14 package (EIAJ outline, case 940A-03), 8.55 mm × 3.80 mm body, 1.27 mm lead pitch, gull-wing leads. Pin 1 is marked by notch or bevel; Pin 7 = GND, Pin 14 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input A/B of NOR gates | Two dedicated inputs per gate; compatible with CMOS outputs and LSTTL (with pull-ups) |
| 3, 6, 10, 13 | Output Y of NOR gates | Active-low NOR output; drives up to 10 LSTTL loads or directly interfaces CMOS/NMOS/TTL |
| 7 | GND | Ground reference for all logic and supply terminals; must be low-impedance connection |
| 14 | VCC | Positive supply rail; decoupling capacitor (0.1 µF ceramic) required within 10 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | VOH ≥ 5.9 V and VOL ≤ 0.26 V at VCC = 6.0 V and IOUT = 2.4 mA - ensures full logic margin in 5 V systems |
| High noise immunity | Typical noise margin >1.0 V across full VCC range - suppresses false triggering in electrically noisy environments |
| Low static power consumption | ICC ≤ 40 µA at 125 °C - enables use in always-on monitoring circuits without thermal penalty |
| JEDEC Std. 7A compliance | Fully conforms to industry-standard DC and AC parametric limits for HC-series logic - guarantees interoperability and testability |
| Chip complexity | 40 FETs / 10 equivalent gates - reflects optimized die size for cost-sensitive volume applications |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Logic decoding of multiple sensor fault signals into a single aggregated alert line. IC Role / Device Role / Timing Role: NOR gate performing active-low wired-OR summation of open-drain sensor alerts. Use Value: Eliminates need for external diodes or pull-up networks while maintaining deterministic propagation (<19 ns at 125 °C). |
Use Scenario: Interlocking logic for door lock/unlock sequence validation before actuator enable. IC Role / Device Role / Timing Role: Combinatorial gate verifying simultaneous presence of valid key signal and door closed status. Use Value: Meets ASIL-B timing constraints with guaranteed 22 ns max tPLH/tPHL at 125 °C and VCC = 4.5 V. |
| Medical Infusion Pump Controller | Smart Energy Meter Firmware Boot Guard |
Use Scenario: Safety-critical watchdog reset arbitration between primary MCU and backup monitor. IC Role / Device Role / Timing Role: NOR-based voting logic ensuring reset assertion only when both monitors agree on fault condition. Use Value: Supports extended temperature operation (–55 °C to +125 °C) and meets IEC 60601 leakage current limits via <1 µA input current. |
Use Scenario: Hardware-enforced boot validation preventing execution of corrupted firmware images. IC Role / Device Role / Timing Role: Gate-level logic verifying simultaneous integrity flags from two independent flash checksum engines. Use Value: Provides deterministic, zero-software fail-safe path with no clock dependency or metastability risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC02DR | TI part; identical logic function and pinout, but specified only to +85 °C (not +125 °C); VOH/VOL tested at lower IOUT (2 mA vs 2.4 mA) | Not suitable for under-hood automotive or high-temp industrial enclosures requiring full –55 °C to +125 °C operation | Select MC74HC02AFL2 when extended temperature qualification and JEDEC Std. 7A compliance are mandatory |
| 74HC02PW,118 | Nexperia TSSOP-14 variant; same electrical specs, but different package footprint (2.5 mm × 6.5 mm vs SOIC-14's 3.8 mm × 8.55 mm) and moisture sensitivity level (MSL3 vs MSL1) | Requires PCB layout revision; unsuitable for reflow profiles incompatible with MSL3 handling | Choose MC74HC02AFL2 for drop-in replacement in existing SOIC-14 designs with MSL1 assembly requirements |
Compared with SN74HC02DR and 74HC02PW,118, the MC74HC02AFL2 provides verified operation across –55 °C to +125 °C, JEDEC Std. 7A conformance, and SOIC-14 (EIAJ) packaging optimized for automated placement and high-reliability reflow-making it the preferred choice for mission-critical industrial and automotive control logic.
Availability
MC74HC02AFL2 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical infusion pump controllers, and smart energy meter firmware boot guard circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74HC02AFL2 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 specializing in energy-efficient power, analog, sensing, and logic solutions for automotive, industrial, cloud, and medical markets.
The MC74HC02AFL2 belongs to the high-speed CMOS (HC) logic family, designed specifically for robust, low-power, wide-voltage-range digital interfacing in harsh-environment embedded systems.
FAQ
What is the maximum operating temperature for the MC74HC02AFL2?
The MC74HC02AFL2 is fully specified and guaranteed to operate from –55 °C to +125 °C across all electrical parameters, including propagation delay, output drive, and input thresholds. This rating applies to the SOIC-14 (EIAJ) package variant and is validated per JEDEC Std. 7A. The MC74HC02AFL2 therefore supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom infrastructure where ambient temperatures exceed +85 °C.
Is the MC74HC02AFL2 pin-compatible with TTL devices?
Yes, the MC74HC02AFL2 is pinout-identical to the 74LS02 TTL device and shares the same 14-pin SOIC footprint. Its inputs are compatible with standard CMOS outputs and, when used with pull-up resistors, interface directly to LSTTL outputs. This allows direct replacement in legacy TTL designs without PCB modification, provided supply voltage remains within the 2.0 V to 6.0 V range supported by the MC74HC02AFL2.
What is the typical power dissipation of the MC74HC02AFL2 at 5 V?
At VCC = 5.0 V and 25 °C, the MC74HC02AFL2 exhibits a typical power dissipation capacitance (CPD) of 22 pF per gate. Using the formula PD = CPD × VCC² × f + ICC × VCC, total dynamic power depends on switching frequency (f) and quiescent current (ICC ≈ 1.0 µA). For example, at 1 MHz toggle rate, one gate consumes ~0.55 mW - enabling efficient use in battery-backed or thermally constrained applications where the MC74HC02AFL2 operates reliably.
Does the MC74HC02AFL2 require external pull-up resistors for TTL interfacing?
Yes - when interfacing with LSTTL outputs, the MC74HC02AFL2 requires external pull-up resistors on its inputs to ensure VIH exceeds the minimum threshold (e.g., ≥2.1 V at VCC = 3.0 V). This is because LSTTL outputs cannot source sufficient current to meet CMOS input voltage requirements without assistance. The MC74HC02AFL2 datasheet confirms this requirement explicitly, and omitting pull-ups may result in indeterminate logic states or increased susceptibility to noise.
What package type does the MC74HC02AFL2 use, and what are its key mechanical dimensions?
The MC74HC02AFL2 uses the SOIC-14 package per EIAJ standard, case outline 940A-03. Its body measures 8.55 mm × 3.80 mm, with 1.27 mm lead pitch and gull-wing terminations. Total height is ≤1.75 mm, and lead coplanarity is controlled to ≤0.10 mm. These dimensions ensure compatibility with standard SOIC-14 pick-and-place equipment and reflow profiles, making the MC74HC02AFL2 suitable for high-volume SMT manufacturing without special tooling.
MC74HC02AFL2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Input Logic Level - Low:
- 0.5V ~ 1.8V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 13ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
MC74HC02AFL2 FAQ
1.How can I place an order for MC74HC02AFL2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC02AFL2 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 MC74HC02AFL2 reliable?
The price and inventory of MC74HC02AFL2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC02AFL2 is usually 5 days.
3.What payment methods are accepted for MC74HC02AFL2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC02AFL2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC02AFL2?
MC74HC02AFL2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC02AFL2 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 MC74HC02AFL2?
For technical support, including MC74HC02AFL2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC02AFL2 requirements.
6.How does Aetrix verify that MC74HC02AFL2 is sourced from the original manufacturer or authorized distributors?
All MC74HC02AFL2 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 MC74HC02AFL2 meets industry standards.
7.What is the process for return or replacement of MC74HC02AFL2?
All MC74HC02AFL2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC02AFL2, 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 MC74HC02AFL2 part is unused and in its original packaging.
Return procedure for MC74HC02AFL2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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