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onsemi MC74AC02N
- Part No.:
- MC74AC02N
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MC74AC02N.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
MC74AC02N from onsemi is a quad 2-input NOR gate in high-performance silicon-gate CMOS technology, operating at 2.0–6.0 V supply, delivering ±24 mA output drive, with propagation delay as low as 4.0 ns at 5.0 V and 50 pF load, used in digital logic interfacing and control signal conditioning in industrial PLCs and embedded microcontroller peripheral decoding.
For engineers reviewing the MC74AC02N datasheet, pinout, applications, or equivalent options, key selection considerations include supply voltage range (2.0–6.0 V), output drive capability (±24 mA), propagation delay (≤6.5 ns over temperature), input threshold compatibility (CMOS-level), and SOIC-14 Pb-free packaging.
Technical Context
The MC74AC02N implements four independent 2-input NOR gates using silicon-gate CMOS process, ensuring rail-to-rail output swing and low static current (≤40 μA at 5.5 V). Its input structure accepts CMOS-compatible logic thresholds-VIH = 2.1 V min at VCC = 3.0 V, VIL = 0.9 V max-and exhibits low input capacitance (4.5 pF).
It supports operation across −40°C to +85°C ambient, with guaranteed AC performance at CL = 50 pF, and meets JEDEC latch-up immunity (>100 mA) and ESD robustness (>2000 V HBM). The device is not TTL-input compatible-distinct from the pin-compatible MC74ACT02 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR gate - provides four independent Boolean OR-NOT operations per package |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V systems without level shifting |
| Output Drive | ±24 mA - sufficient to directly drive LEDs, small relays, or fan-out to ≥10 74AC inputs |
| Propagation Delay | 4.0 ns typ / 6.5 ns max at VCC = 5.0 V, CL = 50 pF - supports >100 MHz toggle rates in 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 under nominal conditions |
| Quiescent ICC | ≤40 μA max at VCC = 5.5 V - enables use in low-power standby logic sections |
| ESD Rating | >2000 V HBM - reduces risk of handling damage during manual assembly or rework |
Pinout & Package
MC74AC02N is supplied in a 14-lead SOIC package (Case 751A), with standard dual-in-line pinout and 1.27 mm pitch. Pin 7 is GND; Pin 14 is VCC; each NOR gate occupies two inputs and one output across Pins 1–2–3, 4–5–6, 8–9–10, and 11–12–13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 8, 11 | NOR Gate Input A | First input of Gates 1–4; CMOS-compatible threshold, ≤1.0 μA leakage |
| 2, 5, 9, 12 | NOR Gate Input B | Second input of Gates 1–4; identical electrical specs to Input A |
| 3, 6, 10, 13 | NOR Gate Output Y | Active-low OR output; rail-to-rail swing, ±24 mA sink/source |
| 7 | GND | Ground reference for all logic and power domains; return path for output currents |
| 14 | VCC | Positive supply input; must be decoupled locally with ≥0.1 μF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| High-Speed Performance | 6.5 ns max propagation delay at 5 V enables synchronization in sub-100 ns timing windows |
| Pb-Free Construction | RoHS-compliant SOIC-14 package (suffix D or DR2G) meets global environmental compliance requirements |
| Wide Supply Range | Operates from 2.0 V to 6.0 V - supports mixed-voltage board designs and battery-backed logic |
| Low Dynamic Power | 30 pF power dissipation capacitance minimizes switching current in high-frequency clocked logic |
| Robust Input Protection | ±20 mA DC input diode current rating prevents damage from transient overvoltage or miswiring |
Applications
| Industrial Control Logic | Microcontroller Peripheral Decoding |
|---|---|
Use Scenario: Discrete safety interlock monitoring in programmable logic controllers where redundant sensor inputs must inhibit actuator activation. IC Role / Device Role / Timing Role: NOR gate implements active-low OR logic for fault detection-any high input forces low output to disable outputs. Use Value: Guaranteed 6.5 ns max delay ensures response within 10 μs cycle time budgets; ±24 mA drive directly controls optocoupler LED strings. |
Use Scenario: Address decoding for memory-mapped peripherals (e.g., UART, SPI, GPIO expanders) on 8-bit microcontrollers with limited native chip-select lines. IC Role / Device Role / Timing Role: Combines address bits and chip-enable signals to generate precise peripheral select strobes synchronized to bus timing. Use Value: 4.0 ns typical propagation delay preserves setup/hold margins on 20 MHz bus cycles; rail-to-rail output eliminates need for pull-ups. |
| Power Sequencing Supervision | Digital Signal Conditioning |
Use Scenario: Monitoring multiple DC/DC converter OK signals to assert a system-wide "power good" flag only when all rails are stable. IC Role / Device Role / Timing Role: Four NOR gates wired as active-low AND (via De Morgan) to detect simultaneous assertion of four independent PWR_OK signals. Use Value: Low 40 μA quiescent current avoids loading supervisor circuits; wide 2.0–6.0 V supply allows direct tie to main 3.3 V or 5 V rail. |
Use Scenario: Debouncing mechanical switch inputs or cleaning up noisy encoder quadrature signals before feeding to interrupt-capable MCU pins. IC Role / Device Role / Timing Role: Configured as SR latch or pulse stretcher to eliminate contact bounce or narrow glitches below 10 ns. Use Value: Sub-7 ns delay variation ensures deterministic edge alignment; ±24 mA output drives Schmitt-trigger inputs with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC74ACT02DG | TTL-compatible inputs (VIH = 2.0 V min at 4.5 V); otherwise identical pinout, speed, and drive | Required when interfacing with legacy 5 V TTL outputs or open-collector drivers | Select MC74ACT02DG only if driving circuitry uses TTL logic levels; MC74AC02N is preferred for pure CMOS systems. |
| SN74LVC02APW | 3.3 V only (1.65–3.6 V), lower drive (±24 mA), 3.7 ns max tPD, 14-pin TSSOP | Suitable for space-constrained 3.3 V-only designs; not interoperable with 5 V logic without translation | Choose SN74LVC02APW for new 3.3 V PCB layouts where footprint reduction is critical; not drop-in for MC74AC02N's 5 V or mixed-voltage use. |
Compared with MC74ACT02DG, MC74AC02N offers higher noise immunity in CMOS systems but lacks TTL input compatibility; versus SN74LVC02APW, it supports wider voltage range and 5 V legacy integration but uses larger SOIC packaging.
Availability
MC74AC02N is available at Aetrix Electronics and suitable for industrial control logic, microcontroller peripheral decoding, and power sequencing supervision requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MC74AC02N 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 management, analog, logic, and discrete devices for automotive, industrial, and cloud infrastructure markets.
The MC74AC02N belongs to the 74AC logic family, designed for high-speed, low-power CMOS applications where rail-to-rail swing, wide supply tolerance, and robust noise immunity are essential in industrial and embedded control systems.
FAQ
What is the maximum supply voltage rating for MC74AC02N?
The MC74AC02N has an absolute maximum DC supply voltage (VCC) rating of +6.5 V. However, its recommended operating range is 2.0 V to 6.0 V. Operation above 6.0 V is not advised for functional reliability, and exceeding 6.5 V may cause permanent damage. The MC74AC02N datasheet specifies that stresses beyond maximum ratings can impair device functionality and long-term reliability.
Does MC74AC02N support TTL-level input signals?
No, MC74AC02N does not support TTL-level inputs. It uses CMOS-compatible input thresholds: VIH ≥ 2.1 V at VCC = 3.0 V and ≥ 3.15 V at VCC = 4.5 V. For TTL-compatible operation (VIH ≈ 2.0 V), the pin-compatible MC74ACT02 variant must be used instead. The MC74AC02N datasheet explicitly distinguishes this functional difference between the AC and ACT families.
What is the typical propagation delay of MC74AC02N at 5.0 V?
The typical propagation delay (tPLH/tPHL) of MC74AC02N is 4.0 ns at VCC = 5.0 V with CL = 50 pF, as specified in the AC Characteristics table. The maximum guaranteed delay over temperature (−40°C to +85°C) is 6.5 ns under the same conditions. This value applies to each of the four NOR gates independently and is measured between 50% input and 50% output voltage transitions.
Is MC74AC02N available in RoHS-compliant packaging?
Yes, MC74AC02N is available in Pb-free, RoHS-compliant packaging. The SOIC-14 variants MC74AC02DG and MC74AC02DR2G both carry the "G" suffix denoting lead-free construction and comply with JEDEC standards. The marking diagram and ordering information in the official datasheet confirm Pb-free status and MSL Level 1 moisture sensitivity rating.
Can MC74AC02N drive a standard LED directly?
Yes, MC74AC02N can drive a standard 2 mA–20 mA indicator LED directly. With guaranteed 24 mA sink capability per output and VOL ≤ 0.44 V at IOL = 24 mA, it supports common-cathode configurations using a series resistor. For example, at VCC = 5 V and 10 mA LED current, a 390 Ω resistor yields ~10 mA with <0.4 V dropout - well within MC74AC02N's safe operating area.
MC74AC02N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AC
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
MC74AC02N FAQ
1.How can I place an order for MC74AC02N through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74AC02N 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 MC74AC02N reliable?
The price and inventory of MC74AC02N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74AC02N is usually 5 days.
3.What payment methods are accepted for MC74AC02N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74AC02N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74AC02N?
MC74AC02N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74AC02N 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 MC74AC02N?
For technical support, including MC74AC02N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74AC02N requirements.
6.How does Aetrix verify that MC74AC02N is sourced from the original manufacturer or authorized distributors?
All MC74AC02N 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 MC74AC02N meets industry standards.
7.What is the process for return or replacement of MC74AC02N?
All MC74AC02N units undergo pre-shipment inspection (PSI). If there is an issue with MC74AC02N, 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 MC74AC02N part is unused and in its original packaging.
Return procedure for MC74AC02N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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