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onsemi MC74HC02AFELG
- Part No.:
- MC74HC02AFELG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC02AFELG.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,748
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Product details
Overview
MC74HC02AFELG from onsemi is a quad 2-input NOR gate in SOEIAJ-14 (JEDEC MS-012) package, operating across 2.0–6.0 V supply, delivering 10 LSTTL load drive capability with propagation delays as low as 13 ns at 6.0 V, used for digital logic inversion and combinational control in industrial interface circuits.
For engineers reviewing the MC74HC02AFELG datasheet, pinout, applications, or equivalent options, key selection considerations include its CMOS-compatible input thresholds, guaranteed 125°C operation, direct TTL/CMOS/NMOS interfacing, and Pb-free SOEIAJ-14 footprint compatibility with legacy 74HC logic designs.
Technical Context
The MC74HC02AFELG implements four independent 2-input NOR gates using high-performance silicon-gate CMOS technology, with inputs compatible with standard CMOS outputs and pullup-resistor-enabled LSTTL interfacing. Its logic function Y = A + B is strictly negative-OR, requiring active-low inputs for high output.
It operates over –55°C to +125°C, supports rail-to-rail input voltage (0 to VCC), and features low quiescent ICC (≤40 µA at 6.0 V, 125°C) and input leakage (±1.0 µA max), enabling robust noise immunity and stable DC operation in mixed-signal embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR (Y = A + B); enables basic combinational logic, reset generation, and enable/disable control |
| Supply Voltage Range | 2.0 V to 6.0 V - supports dual-supply systems and battery-powered 3.3 V/5.0 V logic domains |
| Propagation Delay (tPLH/tPHL) | 13 ns max at VCC = 6.0 V - ensures timing-critical signal routing in high-speed digital control paths |
| Output Drive | 10 LSTTL loads - directly drives legacy TTL inputs without level-shifting or buffering |
| Input Leakage Current | ±1.0 µA max at VCC = 6.0 V, 125°C - guarantees stable logic states under extended temperature stress |
| Operating Temperature | –55°C to +125°C - qualified for automotive under-hood, industrial motor control, and harsh-environment applications |
| ESD Protection | Human Body Model ≥2 kV - provides built-in static discharge resilience during board assembly and handling |
Pinout & Package
MC74HC02AFELG uses the SOEIAJ-14 (JEDEC MS-012) surface-mount package: 8.2 mm × 5.45 mm body, 1.27 mm pitch, 1.42 mm max height, gull-wing leads, RoHS-compliant Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input (A1/B1/A2/B2/A3/B3/A4/B4) | CMOS-compatible logic inputs; require external pull-up for LSTTL interfacing; must be tied to VCC or GND if unused |
| 3, 6, 10, 13 | Output (Y1/Y2/Y3/Y4) | Push-pull CMOS outputs; capable of sourcing/sinking ±25 mA; must remain open if unused |
| 7 | GND | Ground reference for all internal circuitry and I/O; requires low-impedance PCB connection |
| 14 | VCC | Primary power supply (2.0–6.0 V); requires local 0.1 µF ceramic decoupling near the pin |
Key Features
| Feature | Design Value |
|---|---|
| Pinout Compatibility | Identical to LS02 - enables drop-in replacement in legacy TTL designs without layout change |
| Noise Immunity | High CMOS noise margin (>40% of VCC) - resists EMI in electrically noisy industrial environments |
| Interfacing Flexibility | Direct connection to CMOS, NMOS, and TTL families - eliminates need for level translators in mixed-technology systems |
| Power Efficiency | Quiescent ICC ≤1.0 µA at 25°C - reduces standby power in always-on control modules |
| Environmental Compliance | Pb-free, halogen-free, RoHS-compliant - meets global regulatory requirements for industrial and automotive use |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Signal conditioning and enable/disable logic for relay drivers and sensor input buffers in programmable logic controller backplanes. IC Role / Device Role / Timing Role: NOR gate performs active-low enable gating and hardware reset synthesis with sub-15 ns timing margins. Use Value: Guaranteed 125°C operation and 10 LSTTL drive ensure reliable interface between microcontroller GPIOs and industrial-grade actuators. | Use Scenario: Door lock actuator control and window lift logic in centralized body electronics modules. IC Role / Device Role / Timing Role: Implements fail-safe interlock logic and priority-based command arbitration using wired-OR/NOR structures. Use Value: Rail-to-rail input range and low input current allow direct connection to 5 V MCU peripherals without external biasing. |
| Consumer Appliance Control Boards | Medical Diagnostic Equipment Interfaces |
Use Scenario: Power sequencing and safety interlock validation in washing machine and HVAC main control boards. IC Role / Device Role / Timing Role: Generates synchronized enable signals for motor drivers and displays based on multiple sensor inputs. Use Value: Propagation delay consistency across voltage/temperature ensures deterministic timing in safety-critical state machines. | Use Scenario: Isolated communication line conditioning and status flag aggregation in portable ultrasound and patient monitor front-ends. IC Role / Device Role / Timing Role: Buffers and inverts handshake signals between isolated UART transceivers and ARM-based application processors. Use Value: Low input leakage (<1 µA) prevents false triggering in high-impedance diagnostic signal paths. |
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 | SOIC-14 package (wider 3.9 mm body vs. SOEIAJ's 5.45 mm length); identical electrical specs and pinout | Requires PCB footprint revision; suitable where SOIC-14 is already standardized | Select when leveraging existing SOIC-14 land patterns and tape-and-reel logistics |
| TC74HC02AF | Toshiba variant in SOP-14 (JEITA P-MAP-14-A); VIH/VIL thresholds differ slightly at 2.0 V (VIH min = 1.5 V vs. 1.5 V, same spec) | Validated for consumer-grade temperature range only (–40°C to +85°C) | Prefer for cost-sensitive non-industrial applications with relaxed thermal requirements |
Compared with SN74HC02DR and TC74HC02AF, MC74HC02AFELG offers the widest temperature range (–55°C to +125°C) and JEDEC-standard SOEIAJ-14 footprint optimized for high-density industrial PCB layouts, while maintaining full functional and timing equivalence to the 74HC02 family.
Availability
MC74HC02AFELG is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and consumer appliance control boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74HC02AFELG 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 technologies for automotive, industrial, cloud, medical, and IoT applications.
The MC74HC02AFELG belongs to the 74HC logic family, designed specifically for high-noise-immunity, low-power, pin-compatible upgrades of legacy TTL logic in mission-critical embedded systems.
FAQ
What is the maximum operating temperature for MC74HC02AFELG?
The MC74HC02AFELG is rated for continuous operation from –55°C to +125°C across all package types, including the SOEIAJ-14 variant. This specification is validated per JEDEC JESD22-A108 and confirmed in the device's Recommended Operating Conditions table, making MC74HC02AFELG suitable for under-hood automotive and industrial motor drive applications where ambient temperatures exceed 105°C.
Does MC74HC02AFELG support 3.3 V logic systems?
Yes, MC74HC02AFELG fully supports 3.3 V operation: its recommended supply range (2.0–6.0 V) includes 3.3 V, and DC electrical characteristics - including VIH (min 2.1 V at VCC = 3.0 V), VOL (max 0.26 V), and propagation delay (≤22 ns) - are guaranteed across temperature. MC74HC02AFELG interfaces directly with 3.3 V CMOS microcontrollers without level shifters.
Is MC74HC02AFELG pin-compatible with the obsolete 74LS02?
Yes, MC74HC02AFELG has identical pinout and logic function to the 74LS02, as explicitly stated in the datasheet: "The MC74HC02A is identical in pinout to the LS02." While electrical characteristics differ (e.g., CMOS input structure, wider VCC range), the physical pin mapping for all 14 terminals matches, enabling direct PCB replacement in legacy designs when combined with appropriate supply and loading considerations.
What is the input capacitance of MC74HC02AFELG?
The maximum input capacitance (Cin) of MC74HC02AFELG is 10 pF per input, specified across –55°C to +125°C and verified under AC test conditions. This low value minimizes loading on driving sources and supports clean signal integrity in high-frequency clock or data paths - critical when cascading multiple gates or driving transmission lines in MC74HC02AFELG-based logic networks.
Can unused inputs on MC74HC02AFELG be left floating?
No, unused inputs on MC74HC02AFELG must never be left floating. The datasheet mandates: "Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC)." Floating CMOS inputs cause increased ICC, unpredictable logic states, and potential device malfunction due to internal node oscillation - a design requirement strictly enforced in MC74HC02AFELG's Absolute Maximum Ratings and DC Electrical Characteristics sections.
MC74HC02AFELG 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
MC74HC02AFELG FAQ
1.How can I place an order for MC74HC02AFELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC02AFELG 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 MC74HC02AFELG reliable?
The price and inventory of MC74HC02AFELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC02AFELG is usually 5 days.
3.What payment methods are accepted for MC74HC02AFELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC02AFELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC02AFELG?
MC74HC02AFELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC02AFELG 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 MC74HC02AFELG?
For technical support, including MC74HC02AFELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC02AFELG requirements.
6.How does Aetrix verify that MC74HC02AFELG is sourced from the original manufacturer or authorized distributors?
All MC74HC02AFELG 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 MC74HC02AFELG meets industry standards.
7.What is the process for return or replacement of MC74HC02AFELG?
All MC74HC02AFELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC02AFELG, 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 MC74HC02AFELG part is unused and in its original packaging.
Return procedure for MC74HC02AFELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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