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onsemi MC74AC02D
- Part No.:
- MC74AC02D
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC74AC02D.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,814
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Product details
Overview
MC74AC02D from onsemi is a quad 2-input NOR gate in SOIC-14 package, implementing standard positive-logic NOR function with CMOS technology. It operates from 2.0 V to 6.0 V supply, delivers ±24 mA output drive, exhibits 4.0 ns typical propagation delay at 5.0 V/50 pF, and supports industrial temperature range (−40°C to +85°C) - used in digital logic interfacing, address decoding, and control signal conditioning.
For engineers reviewing the MC74AC02D datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated SOIC-14 pin mapping, confirmed DC/AC electrical limits, and real-world substitution guidance for logic-level translation and combinational logic design.
Technical Context
The MC74AC02D uses high-performance silicon-gate CMOS process to achieve rail-to-rail output swing and low static current. Its inputs are compatible with both CMOS and TTL logic thresholds when operated at ≥4.5 V, and it features symmetrical tPLH/tPHL propagation delays under 50 pF load.
It integrates four independent NOR gates with no internal interconnects; each gate has dedicated inputs and output. Input leakage is limited to ±1.0 μA over full temperature range, and dynamic output current capability reaches ±75 mA per output for short-duration pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR gate - implements Boolean Y = NOT(A OR B) per channel |
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing (e.g., 3.3 V or 5 V rails) |
| Output Drive | ±24 mA - sufficient to directly drive LEDs, small MOSFET gates, or other 74-series inputs |
| Propagation Delay | 6.0 ns max at 5.0 V/50 pF - enables reliable operation up to ~80 MHz toggle rate in non-critical paths |
| Input Thresholds | VIH = 2.1 V min, VIL = 0.9 V max at VCC = 3.0 V - ensures noise margin >0.6 V in 3.3 V systems |
| Quiescent ICC | 40 μA max - negligible power impact in battery-backed or low-power standby modes |
| ESD Rating | HBM >2000 V - withstands typical handling without external protection diodes |
Pinout & Package
MC74AC02D is supplied in SOIC-14 (Case 751A) package, 8.75 mm × 3.90 mm body, 1.27 mm pitch, gull-wing leads, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input A of Gate 1 | First input to first NOR gate; referenced to GND/VCC for logic evaluation |
| 2 | Input B of Gate 1 | Second input to first NOR gate; both inputs must be LOW for HIGH output |
| 3 | Output Y of Gate 1 | Active-HIGH open-drain–compatible output; sinks or sources up to 24 mA |
| 4 | Input A of Gate 2 | First input to second independent NOR gate; electrically isolated from Gate 1 |
| 5 | Input B of Gate 2 | Second input to Gate 2; no internal coupling to other gates |
| 6 | Output Y of Gate 2 | Dedicated output for Gate 2; shares no loading or timing dependency with other outputs |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance |
| 8 | Output Y of Gate 3 | Third independent NOR output; identical electrical specs to Pins 3 and 6 |
| 9 | Input B of Gate 3 | Second input to Gate 3; matches Pin 2 and Pin 5 functionality |
| 10 | Input A of Gate 3 | First input to Gate 3; matches Pin 1 and Pin 4 functionality |
| 11 | Output Y of Gate 4 | Fourth independent NOR output; fully buffered and decoupled |
| 12 | Input B of Gate 4 | Second input to Gate 4; conforms to same VIH/VIL thresholds as other inputs |
| 13 | Input A of Gate 4 | First input to Gate 4; completes quad gate set with no shared resources |
| 14 | VCC | Positive supply rail; must be bypassed locally with 0.1 μF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| CMOS Technology | Enables ultra-low static power consumption (<40 μA) while maintaining TTL-compatible speed |
| Rail-to-Rail Output Swing | VOH ≥ 4.4 V and VOL ≤ 0.44 V at VCC = 4.5 V/24 mA - ensures robust logic level restoration |
| High Noise Immunity | Input hysteresis not present, but guaranteed VIH/VIL margins provide >0.6 V noise margin at 3.3 V |
| Pb-Free Packaging | RoHS-compliant SOIC-14 with "G" suffix marking - qualified for lead-free reflow per J-STD-020 |
| Industrial Temperature Range | Specified operation from −40°C to +85°C - suitable for automotive body control and industrial PLC modules |
Applications
| Address Decoding | Power-On Reset Logic |
|---|---|
|
Use Scenario: Generating chip-select signals for memory or peripheral ICs based on address bus states. IC Role / Device Role / Timing Role: Combinational logic element performing active-LOW enable generation via NOR-based address comparison. Use Value: Eliminates need for discrete transistor networks; supports fast decode cycles due to sub-7 ns propagation delay. |
Use Scenario: Combining reset sources (power monitor, manual button, watchdog timeout) into a single synchronized reset pulse. IC Role / Device Role / Timing Role: Active-LOW reset combiner where any asserted input forces global reset assertion. Use Value: Provides glitch-free reset arbitration with predictable timing and no external pull-ups required. |
| LED Driver Interface | Microcontroller I/O Expansion |
|
Use Scenario: Directly driving common-anode LED segments from microcontroller GPIO pins with inverted logic. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between MCU outputs and LED anodes. Use Value: Delivers 24 mA sink capability per output - sufficient for bright indicator LEDs without external transistors. |
Use Scenario: Expanding limited GPIO count on embedded controllers for keypad scanning or sensor polling. IC Role / Device Role / Timing Role: Combinational logic block generating row/column strobes or scan enable signals. Use Value: Enables deterministic timing control with known propagation delay, critical for debounced matrix scanning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC02N | Same AC logic family, identical pinout and DC specs; TI version uses different wafer fab and qualification flow | Identical functional behavior; minor variation in CIN (4.5 pF vs 5.0 pF) has no impact on 50 pF load timing | Select SN74AC02N when dual-sourcing across onsemi and TI supply chains is required for BOM resilience |
| 74VHC02M | Higher VCC max (7.0 V), lower ICC (2.0 μA typ), but slower tPLH/tPHL (7.5 ns max at 5 V) | Preferred in ultra-low-power systems where <5 μA quiescent current outweighs 1.5 ns speed penalty | Choose 74VHC02M only if system-level power budget mandates sub-5 μA static draw and timing slack exists |
Compared with MC74AC02D, SN74AC02N offers drop-in compatibility and identical performance, while 74VHC02M trades 1.5 ns speed for >10× lower ICC - making MC74AC02D optimal for balanced speed/power in industrial control logic.
Availability
MC74AC02D is available at Aetrix Electronics and suitable for address decoding, power-on reset sequencing, LED interface circuits requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for MC74AC02D 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 electronics for automotive, industrial, cloud, and IoT applications.
The MC74AC02D belongs to the 74AC logic family, designed for high-speed, low-power, TTL-compatible CMOS digital interfacing in harsh-environment embedded systems.
FAQ
What logic family does MC74AC02D belong to, and how does it differ from 74ACT variants?
The MC74AC02D belongs to the 74AC (Advanced CMOS) logic family. Unlike the 74ACT variant, which features TTL-compatible input thresholds (VIH = 2.0 V min at 5 V), the MC74AC02D uses CMOS-compatible inputs (VIH = 3.15 V min at 4.5 V). This makes MC74AC02D better suited for pure CMOS systems, while 74ACT variants interface more easily with legacy TTL outputs. Both share identical pinout, output drive, and propagation delay specs.
Can MC74AC02D operate reliably at 3.3 V supply voltage?
Yes, MC74AC02D is fully specified down to 2.0 V and supports 3.3 V operation across the full industrial temperature range (−40°C to +85°C). At VCC = 3.3 V, VOH ≥ 2.9 V and VOL ≤ 0.44 V under 24 mA load, providing >0.6 V noise margin. Propagation delay increases to 7.5 ns max (vs 6.0 ns at 5 V), remaining suitable for most 3.3 V digital control applications.
Is MC74AC02D pin-compatible with MC74ACT02D?
Yes, MC74AC02D and MC74ACT02D share identical SOIC-14 pinout, terminal assignments, and package dimensions (Case 751A). They differ only in input threshold specifications and minor AC timing variations - allowing direct PCB replacement when system-level input voltage levels permit. No layout changes are required for substitution.
What is the maximum capacitive load MC74AC02D can drive while maintaining specified timing?
MC74AC02D is characterized for CL = 50 pF in its AC specifications, with tPLH/tPHL guaranteed ≤6.5 ns at VCC = 5.0 V. Driving loads beyond 50 pF increases propagation delay nonlinearly; for 100 pF, delay typically rises to ~9 ns. For reliable timing closure above 50 pF, add series termination or reduce trace length - MC74AC02D itself does not specify derating curves beyond 50 pF.
Does MC74AC02D require external pull-up or pull-down resistors on unused inputs?
No, MC74AC02D inputs do not require external biasing. Each input has CMOS structure with negligible leakage (±1.0 μA max), so floating inputs will remain near VCC or GND due to internal gate capacitance and board parasitics - but best practice dictates tying unused inputs to VCC or GND to prevent noise-induced switching. The device does not include internal pull-ups or pull-downs.
MC74AC02D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 4 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.9V ~ 1.65V
- Input Logic Level - High:
- 2.1V ~ 3.85V
- Max Propagation Delay @ V, Max CL:
- 6.5ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MC74AC02D FAQ
1.How can I place an order for MC74AC02D through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74AC02D 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 MC74AC02D reliable?
The price and inventory of MC74AC02D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74AC02D is usually 5 days.
3.What payment methods are accepted for MC74AC02D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74AC02D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74AC02D?
MC74AC02D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74AC02D 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 MC74AC02D?
For technical support, including MC74AC02D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74AC02D requirements.
6.How does Aetrix verify that MC74AC02D is sourced from the original manufacturer or authorized distributors?
All MC74AC02D 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 MC74AC02D meets industry standards.
7.What is the process for return or replacement of MC74AC02D?
All MC74AC02D units undergo pre-shipment inspection (PSI). If there is an issue with MC74AC02D, 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 MC74AC02D part is unused and in its original packaging.
Return procedure for MC74AC02D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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