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onsemi MC74ACT02MELG
- Part No.:
- MC74ACT02MELG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74ACT02MELG.pdf
- Description:
- IC GATE NOR 4CH 2-INP SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:4,538
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Product details
Overview
MC74ACT02MELG from onsemi is a quad 2-input NOR gate in SOIC-14 package, featuring TTL-compatible inputs, 24 mA output drive capability, propagation delay ≤9.0 ns at 5.0 V and −40°C to +85°C operating range - used for digital logic level translation and signal inversion in industrial control and embedded interface circuits.
For engineers reviewing the MC74ACT02MELG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package mapping, functional role in combinational logic design, and validated alternative options for board-level compatibility assessment.
Technical Context
This device implements four independent 2-input NOR gates using high-performance silicon-gate CMOS technology. Each gate provides rail-to-rail output swing, operates with 4.5 V to 5.5 V supply, and accepts TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V).
It supports fan-out of ≥10 LS-TTL loads per output, exhibits low input leakage (±1.0 μA max), and maintains guaranteed VOH ≥4.4 V and VOL ≤0.44 V under 24 mA sink/source load - enabling robust noise margin and inter-stage interfacing in mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR gate - performs Boolean OR-NOT operation on two inputs per channel |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL and CMOS systems |
| Propagation Delay | ≤9.0 ns max (tPHL), ≤9.0 ns max (tPLH) at VCC = 5.0 V, CL = 50 pF - ensures timing-critical combinational logic integrity |
| Output Drive | ±24 mA - drives 10+ LS-TTL loads or interfaces directly with microcontroller GPIOs |
| Input Compatibility | TTL-compatible inputs - accepts 0.8 V/2.0 V thresholds, eliminating need for level-shifting circuitry |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental reliability |
| ESD Rating | >2000 V HBM - withstands handling and board assembly electrostatic stress |
Pinout & Package
MC74ACT02MELG is housed in a Pb-free SOIC-14 (Case 751A) package, 8.75 mm × 4.00 mm × 1.75 mm body size, with 1.27 mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 12, 13 | Input (A/B per gate) | Eight total inputs across four NOR gates - each pair feeds one gate's A and B terminals |
| 3, 6, 10, 11 | Output (Y per gate) | Four independent NOR outputs - active-low logic result of A NOR B |
| 7 | GND | Ground reference for all logic and power domains - must be low-impedance connection |
| 14 | VCC | Positive supply terminal - decoupling capacitor (0.1 μF) required within 10 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct connection to legacy 5 V TTL outputs without external resistors or translators |
| 24 mA output sink/source | Supports driving multiple downstream logic inputs or small LEDs without buffer stages |
| Low quiescent ICC (40 μA max) | Minimizes static power draw in always-on control logic or battery-backed subsystems |
| Pb-free SOIC-14 packaging | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity Level 1 |
| Guaranteed AC/DC performance over temperature | Specified parameters valid across full −40°C to +85°C range - no derating needed for industrial use |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Signal conditioning and enable/disable logic for relay drivers and sensor interface lines in programmable logic controllers. IC Role / Device Role / Timing Role: NOR gate performing active-low enable gating and status inversion prior to optocoupler or MOSFET driver stages. Use Value: Eliminates discrete transistor inverters; 24 mA drive directly interfaces with 2N2222 base or TC4420 input, reducing BOM count by 4–6 components per channel. |
Use Scenario: Door lock actuator control logic and mirror position feedback validation in centralized body electronics modules. IC Role / Device Role / Timing Role: Combinational logic element generating lock/unlock command signals from door switch and key fob inputs. Use Value: TTL-compatible inputs accept raw switch bounce signals; propagation delay ≤9 ns ensures deterministic response within 20 ms safety window. |
| Medical Diagnostic Equipment Panels | Test & Measurement Instrumentation |
|
Use Scenario: Front-panel button debouncing and LED indicator control in ultrasound or ECG monitor user interfaces. IC Role / Device Role / Timing Role: NOR-based SR latch and signal inversion for momentary push-button state capture and visual feedback. Use Value: Guaranteed −40°C to +85°C operation supports wide ambient storage and clinical deployment; 0.44 V VOL ensures clean low-state detection by ADC reference comparators. |
Use Scenario: Digital trigger path arbitration and signal routing control in oscilloscope and logic analyzer front-end boards. IC Role / Device Role / Timing Role: Glue logic for synchronizing external trigger events with internal sampling clocks and state machines. Use Value: Low input capacitance (4.5 pF) prevents signal edge degradation on 100 MHz+ trigger paths; 2.0 V VIH threshold rejects sub-threshold noise in noisy lab environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT02DR | Identical logic function, same 4.5–5.5 V supply, but TI part uses different process - VOH/VOL specs match within 0.05 V tolerance | Qualified to AEC-Q100 Grade 2 (−40°C to +105°C); suitable for automotive under-hood use where extended temp is required | Select SN74ACT02DR when operating ambient exceeds +85°C or AEC-Q100 compliance is mandatory |
| 74VHC02M | Higher VCC range (2.0–5.5 V), lower drive (±8 mA), faster typical tPD (5.5 ns), but lacks TTL-compatible inputs (VIH = 70% VCC) | Requires level-shifting for TTL sources; preferred in low-power 3.3 V systems where fan-out < 4 is acceptable | Choose 74VHC02M only if supply voltage flexibility down to 2.0 V is critical and input sources are CMOS-only |
Compared with MC74ACT02MELG, SN74ACT02DR extends thermal range and adds automotive qualification at identical pinout and drive strength, while 74VHC02M trades TTL compatibility and output current for wider VCC range and lower static power - making MC74ACT02MELG optimal for cost-sensitive 5 V industrial designs requiring plug-in TTL interoperability.
Availability
MC74ACT02MELG is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.
Supply support for MC74ACT02MELG 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 electronics, delivering power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC74ACT02MELG belongs to the 74ACT logic family designed specifically for high-speed, TTL-compatible 5 V digital interfacing - balancing speed, noise immunity, and legacy system integration.
FAQ
What logic family does MC74ACT02MELG belong to, and how does it differ from standard 74AC devices?
MC74ACT02MELG belongs to the 74ACT logic family, distinguished by TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at 5 V), unlike 74AC which requires CMOS-level inputs (VIH = 3.15 V min). This allows MC74ACT02MELG to interface directly with legacy TTL outputs without pull-up resistors or level shifters - a key advantage in mixed-technology upgrades. The core NOR functionality and pinout remain identical between MC74AC02 and MC74ACT02 variants.
What is the maximum propagation delay specification for MC74ACT02MELG under industrial temperature conditions?
The maximum propagation delay for MC74ACT02MELG is 9.0 ns for tPHL and 9.0 ns for tPLH, specified at VCC = 5.0 V ±0.5 V, CL = 50 pF, and TA = −40°C to +85°C. These values are guaranteed across the full industrial temperature range - no derating is required. Measured at 50% input/output transition points, this delay enables reliable operation in synchronous logic paths up to ~55 MHz clock-equivalent frequencies.
Does MC74ACT02MELG support mixed-voltage operation, such as interfacing with 3.3 V microcontrollers?
No, MC74ACT02MELG is not rated for 3.3 V operation: its recommended VCC range is strictly 4.5 V to 5.5 V, and input thresholds are defined only for 4.5–5.5 V supplies. Driving its inputs from a 3.3 V microcontroller GPIO may result in marginal or non-functional VIH recognition (2.0 V threshold vs. 3.3 V logic high). For 3.3 V systems, use 74LVC02 or 74AHC02 instead. MC74ACT02MELG must be powered from a regulated 5 V rail.
What package type and lead finish does MC74ACT02MELG use, and is it RoHS-compliant?
MC74ACT02MELG uses a Pb-free SOIC-14 package (Case 751A), with matte tin lead finish and moisture sensitivity level (MSL) 1 - meaning unlimited floor life at ≤30°C/60% RH. It complies fully with RoHS Directive 2011/65/EU and JEDEC J-STD-020. The "G" suffix in the part number explicitly denotes Pb-free construction, and the device is rated for reflow soldering per IPC/JEDEC J-STD-020.
Can MC74ACT02MELG drive LEDs directly, and what current-limiting considerations apply?
Yes, MC74ACT02MELG can drive LEDs directly via its 24 mA sink capability (IOL = 24 mA). For a typical red LED (VF ≈ 1.8 V @ 20 mA), connect anode to VCC and cathode to an MC74ACT02MELG output pin - no series resistor is needed if VF + VOL ≤ VCC. At VCC = 5.0 V, worst-case VOL = 0.44 V, leaving 2.76 V headroom - sufficient for most indicator LEDs. Avoid continuous DC drive above 16 mA per output to maintain junction temperature within limits.
MC74ACT02MELG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ACT
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 4 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 9.5ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74ACT02MELG FAQ
1.How can I place an order for MC74ACT02MELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT02MELG 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 MC74ACT02MELG reliable?
The price and inventory of MC74ACT02MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT02MELG is usually 5 days.
3.What payment methods are accepted for MC74ACT02MELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT02MELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT02MELG?
MC74ACT02MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT02MELG 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 MC74ACT02MELG?
For technical support, including MC74ACT02MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT02MELG requirements.
6.How does Aetrix verify that MC74ACT02MELG is sourced from the original manufacturer or authorized distributors?
All MC74ACT02MELG 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 MC74ACT02MELG meets industry standards.
7.What is the process for return or replacement of MC74ACT02MELG?
All MC74ACT02MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT02MELG, 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 MC74ACT02MELG part is unused and in its original packaging.
Return procedure for MC74ACT02MELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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