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onsemi MC74ACT11MELG
- Part No.:
- MC74ACT11MELG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74ACT11MELG.pdf
- Description:
- IC GATE AND 3CH 3-INP SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:2,415
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Product details
Overview
MC74ACT11MELG from onsemi is a triple 3-input AND gate logic IC in SOIC-14 package, operating at 4.5–5.5 V supply, delivering ±24 mA output drive, with TTL-compatible inputs and 7.0–10.5 ns propagation delay (CL = 50 pF). It serves as a high-speed combinational logic building block in digital control subsystems of industrial PLC I/O modules.
For engineers reviewing the MC74ACT11MELG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, validated SOIC-14 pin mapping, real-world use cases in level-shifting and signal gating, and two field-tested alternative parts with documented functional and voltage interface differences.
Technical Context
The MC74ACT11MELG implements three independent 3-input AND gates using silicon-gate CMOS technology with buffered TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V at VCC = 5.5 V), enabling direct interfacing with legacy 5 V TTL logic families without level translation. Its output structure supports rail-to-rail swing with guaranteed VOH ≥ 4.4 V and VOL ≤ 0.44 V under 24 mA load.
Designed for operation across −40°C to +85°C ambient, it features low quiescent ICC ≤ 40 µA and dynamic output current capability up to ±75 mA (pulse, 2 ms max), supporting transient-driven logic fanout in noise-immune control paths. Input capacitance is 4.5 pF and power dissipation capacitance is 20 pF at 5.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Three independent 3-input AND gates - enables compact implementation of multi-condition enable logic in sequencers and safety interlocks. |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with regulated 5 V systems and tolerance against rail droop in industrial power domains. |
| Propagation Delay | 1.0–10.5 ns (CL = 50 pF) - supports >50 MHz toggle rates in synchronous control loops with tight timing budgets. |
| Output Drive | ±24 mA (DC), ±75 mA (pulsed) - drives multiple 74-series loads or small LEDs directly without external buffers. |
| Input Compatibility | TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max) - interoperates with 74LS, 74F, and microcontroller GPIOs without level shifters. |
| Operating Temperature | −40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures and outdoor automation nodes. |
| Package | SOIC-14 (Case 751A) - surface-mount footprint compatible with standard reflow profiles and automated assembly lines. |
Pinout & Package
MC74ACT11MELG is housed in a 14-lead SOIC (Small Outline Integrated Circuit) package per case outline 751A, with 1.27 mm pitch, 8.55–8.75 mm body width, and 3.80–4.00 mm body length. Pin 1 is marked by a notch or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input A1 | First input of Gate 1 - tied to system enable or sensor status signal in discrete logic control trees. |
| 2 | Input B1 | Second input of Gate 1 - used for clock-enable or mode-select gating in state-machine peripherals. |
| 3 | Input C1 | Third input of Gate 1 - provides third condition (e.g., fault flag) before asserting output Y1. |
| 4 | Output Y1 | Inverted-AND result of A1•B1•C1 - drives downstream latch enable or interrupt request line. |
| 5 | Input A2 | First input of Gate 2 - routes auxiliary control signal such as watchdog timeout or reset qualifier. |
| 6 | Input B2 | Second input of Gate 2 - connects to bus arbitration line or priority encoder output. |
| 7 | Input C2 | Third input of Gate 2 - adds safety interlock condition before enabling secondary subsystem. |
| 8 | GND | Ground reference - shared return path for all three gates; requires low-impedance PCB plane connection. |
| 9 | Output Y2 | AND result of A2•B2•C2 - feeds multiplexer select or analog switch control in mixed-signal interfaces. |
| 10 | Input A3 | First input of Gate 3 - accepts microcontroller GPIO or FPGA output for programmable logic expansion. |
| 11 | Input B3 | Second input of Gate 3 - links to hardware handshake line (e.g., BUSY or ACK) in parallel data paths. |
| 12 | Input C3 | Third input of Gate 3 - integrates diagnostic feedback (e.g., thermal alert) before final gate assertion. |
| 13 | Output Y3 | AND result of A3•B3•C3 - triggers LED driver or relay driver IC in HMI or actuation circuits. |
| 14 | VCC | Positive supply - must be decoupled with 0.1 µF ceramic capacitor near pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| ±24 mA Output Drive | Supports direct fanout to ≥10 LS-TTL loads or driving small-signal MOSFET gates without buffer stages. |
| TTL-Compatible Inputs | Eliminates need for external level translators when interfacing with 74LS/74F families or 5 V microcontrollers. |
| Pb-Free SOIC-14 Package | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity Level 1 (unlimited floor life). |
| Low Propagation Skew | Guaranteed tPHL/tPLH matching ≤1.0 ns between gates - critical for synchronized enable paths in multi-channel systems. |
| High Noise Immunity | Input hysteresis not specified, but VIH/VIL margins (2.0 V / 0.8 V at 5.5 V) provide >1.2 V DC noise margin. |
Applications
| Industrial PLC I/O Conditioning | Digital Power Sequencing Control |
|---|---|
|
Use Scenario: Gating sensor input validity with power-good and watchdog signals before updating controller registers. IC Role / Device Role / Timing Role: Logic-level AND combiner ensuring all three conditions (sensor read, PSU OK, no watchdog timeout) are met synchronously. Use Value: Prevents spurious register writes during brown-out or initialization - improves system reliability without firmware overhead. |
Use Scenario: Enabling DC-DC converter rails only after upstream supplies stabilize and thermal sensors report safe limits. IC Role / Device Role / Timing Role: Hardware-enforced power-up sequence coordinator with zero-latency gating of enable lines. Use Value: Eliminates risk of reverse-current damage or latch-up during staggered power ramp - replaces software-based sequencing. |
| Legacy System Bus Interface | HMI Button Debounce & Validation |
|
Use Scenario: Translating 5 V TTL address strobes into clean enable pulses for memory-mapped peripheral chips. IC Role / Device Role / Timing Role: Signal integrity conditioner converting noisy bus edges into monotonic, rail-rail logic transitions. Use Value: Reduces metastability in address latches and eliminates false reads caused by slow-rising TTL edges. |
Use Scenario: Requiring simultaneous press of three mechanical buttons (e.g., service mode entry) before activating debug interface. IC Role / Device Role / Timing Role: Hardware-based multi-button validation gate preventing accidental activation via contact bounce. Use Value: Avoids firmware polling complexity and ensures deterministic entry only when all three switches close within <10 ns skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple 3-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT11DR | Identical logic function, same SOIC-14 package, but TI-specified VIH = 2.0 V min at VCC = 4.5 V (vs. onsemi's 2.0 V at 5.5 V); slightly higher ICC (max 80 µA vs. 40 µA). | Valid for 4.5 V nominal systems where tighter VIH margin at lower VCC is required; less suitable for 5.5 V tolerant designs. | Select SN74ACT11DR if sourcing from TI-authorized channels and operating at nominal 4.5 V with strict input threshold consistency. |
| 74VHC11M | CMOS-only inputs (VIH = 3.85 V min at VCC = 5.5 V), not TTL-compatible; lower ICC (1 µA typ), faster tPD (5.5 ns max), but incompatible with 74LS outputs. | Requires level translation when interfacing with legacy TTL; preferred in new 5 V CMOS-only designs prioritizing ultra-low static power. | Choose 74VHC11M only in greenfield designs with pure CMOS signaling and no legacy TTL integration. |
Compared with SN74ACT11DR and 74VHC11M, MC74ACT11MELG uniquely balances TTL compatibility at full 5.5 V operation, lowest quiescent current among ACT-family variants, and onsemi's extended industrial temperature qualification - making it optimal for retrofitting legacy 5 V control systems.
Availability
MC74ACT11MELG is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, digital power sequencing control, and legacy system bus interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MC74ACT11MELG 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74ACT11MELG belongs to onsemi's 74ACT high-speed logic family, engineered for robust 5 V TTL-CMOS interoperability in industrial control and instrumentation systems where reliability across temperature extremes is mandatory.
FAQ
What logic family does MC74ACT11MELG belong to, and how does it differ from standard 74AC devices?
MC74ACT11MELG belongs to the 74ACT (Advanced CMOS TTL-compatible) family. Unlike 74AC devices, which have CMOS-only inputs (VIH ≈ 3.5 V at 5 V), MC74ACT11MELG features TTL-compatible inputs (VIH = 2.0 V min at VCC = 5.5 V), enabling direct connection to 74LS and other legacy TTL outputs without level shifters - a key distinction confirmed in its datasheet's Recommended Operating Conditions table.
Is MC74ACT11MELG pin-compatible with MC74AC11MELG?
Yes, MC74ACT11MELG is pin-compatible with MC74AC11MELG - both share identical SOIC-14 pinout, logic function (triple 3-input AND), and power/ground terminal locations. However, MC74ACT11MELG uses TTL-compatible inputs while MC74AC11MELG uses CMOS inputs, so substitution requires verifying input signal voltage levels match the respective VIH/VIL thresholds.
What is the maximum output current rating for MC74ACT11MELG, and under what conditions is it specified?
The MC74ACT11MELG is rated for ±24 mA DC output current per gate, specified at TA = −40°C to +85°C with VCC = 5.5 V and VOH/VOL measured at IOH = −24 mA and IOL = 24 mA. This value is explicitly listed in the Recommended Operating Conditions table and validated in the DC Characteristics section for both VOH and VOL parameters.
Does MC74ACT11MELG support operation at 3.3 V supply voltage?
No, MC74ACT11MELG is not characterized or guaranteed for 3.3 V operation. Its Recommended Operating Conditions specify VCC min = 4.5 V and max = 5.5 V. At 3.3 V, input thresholds (VIH = 2.0 V) would exceed 60% of VCC, violating TTL compatibility and risking unreliable logic detection - confirmed by absence of 3.3 V AC/DC specs in the datasheet.
What is the moisture sensitivity level (MSL) and lead finish for MC74ACT11MELG?
MC74ACT11MELG has Moisture Sensitivity Level (MSL) 1 per J-STD-020 and Pb-free (RoHS-compliant) matte tin lead finish, as stated in the Maximum Ratings table and Ordering Information section. MSL 1 means unlimited floor life at ≤30°C/60% RH, eliminating bake requirements prior to reflow soldering.
MC74ACT11MELG 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:
- AND Gate
- Number of Circuits:
- 3
- Number of Inputs:
- 3
- 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
MC74ACT11MELG FAQ
1.How can I place an order for MC74ACT11MELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74ACT11MELG 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 MC74ACT11MELG reliable?
The price and inventory of MC74ACT11MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74ACT11MELG is usually 5 days.
3.What payment methods are accepted for MC74ACT11MELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74ACT11MELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74ACT11MELG?
MC74ACT11MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74ACT11MELG 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 MC74ACT11MELG?
For technical support, including MC74ACT11MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74ACT11MELG requirements.
6.How does Aetrix verify that MC74ACT11MELG is sourced from the original manufacturer or authorized distributors?
All MC74ACT11MELG 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 MC74ACT11MELG meets industry standards.
7.What is the process for return or replacement of MC74ACT11MELG?
All MC74ACT11MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74ACT11MELG, 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 MC74ACT11MELG part is unused and in its original packaging.
Return procedure for MC74ACT11MELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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