onsemi MC74AC11MELG

Overview

MC74AC11MELG from onsemi is a triple 3-input AND gate in high-performance silicon-gate CMOS technology, operating from 2.0 V to 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 control, address decoding, and enable gating in industrial microcontroller interfaces.

For engineers reviewing the MC74AC11MELG datasheet, pinout, applications, or equivalent options, this page provides verified functional specifications, SOIC-14 package details, real-world timing behavior under 50 pF loading, input voltage thresholds across temperature, and validated alternative logic gates for design flexibility.

Technical Context

The MC74AC11MELG implements three independent 3-input AND functions using CMOS transistor pairs with rail-to-rail output swing and TTL-compatible noise margins. Its inputs accept voltages up to VCC without damage and exhibit low input capacitance (4.5 pF) and leakage (±1.0 µA), enabling high-speed interfacing with minimal loading.

It operates across −40°C to +85°C ambient, supports 50 pF capacitive loads per output, and maintains guaranteed VOH ≥ 4.4 V and VOL ≤ 0.44 V at IOL = 24 mA and IOH = −24 mA under 5.5 V supply, meeting standard 74AC logic family interoperability requirements.

Key Specifications

Pinout & Package

MC74AC11MELG is housed in a Pb-free SOIC-14 (Case 751A) package measuring 8.75 mm × 4.00 mm × 1.75 mm, with 1.27 mm pitch, gull-wing leads, and moisture sensitivity level 1 - suitable for standard reflow and hand-soldering processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-input AND gate applications.

Compared with SN74AC11DR and 74VHC11M, MC74AC11MELG delivers superior speed (4.0 ns propagation) and balanced drive strength (±24 mA) while maintaining industrial temperature range and Pb-free compliance - making it optimal for timing-critical, noise-prone embedded control nodes.

Availability

MC74AC11MELG is available at Aetrix Electronics and suitable for industrial PLCs, microcontroller-based instrumentation, legacy bus interface modules, and LED safety lighting systems requiring stable component supply and long-term manufacturability.

Supply support for MC74AC11MELG 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 sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC74AC11MELG belongs to the 74AC logic family designed for high-speed, low-power digital interfacing in industrial control, test equipment, and communication subsystems where reliability across extended temperature ranges is critical.

FAQ

What logic family does MC74AC11MELG belong to, and how does it differ from 74ACT variants?

MC74AC11MELG belongs to the 74AC (Advanced CMOS) logic family, characterized by CMOS inputs and outputs with 2.0–6.0 V operation and ±24 mA drive. Unlike the 74ACT variant (e.g., MC74ACT11), which features TTL-compatible inputs requiring VIH ≥ 2.0 V at 4.5 V, the MC74AC11MELG uses pure CMOS input thresholds (VIH = 3.15 V min at 4.5 V), offering higher noise immunity but requiring compatible driving sources. Both share identical pinout and SOIC-14 packaging.

Can MC74AC11MELG operate reliably at 3.3 V supply, and what are its key DC parameters at that voltage?

Yes, MC74AC11MELG is fully specified down to 2.0 V and operates reliably at 3.3 V. At VCC = 3.3 V, VIH is guaranteed ≥ 2.1 V, VIL ≤ 0.9 V, VOH ≥ 2.9 V (at −50 µA), and VOL ≤ 0.1 V (at 50 µA); output drive remains ±24 mA. Propagation delay increases to 5.5 ns typ (CL = 50 pF), and input capacitance stays at 4.5 pF - confirming suitability for mixed-voltage 3.3 V/5 V system interfacing.

Is MC74AC11MELG pin-compatible with other triple 3-input AND gates in SOIC-14 packages?

Yes, MC74AC11MELG follows the industry-standard SOIC-14 pinout for triple 3-input AND gates (e.g., SN74AC11, 74VHC11, CD74AC11). Pin 1–3, 4–6, 8–12, 7 (GND), and 14 (VCC) match identically across these parts. This allows direct substitution in existing layouts without PCB modification, provided voltage, timing, and drive requirements align with the target application.

What is the maximum capacitive load MC74AC11MELG can drive while maintaining guaranteed timing performance?

MC74AC11MELG is characterized and guaranteed for timing performance (propagation delay, transition times) with a 50 pF capacitive load per output, as stated in the AC Characteristics table. Driving loads beyond 50 pF will increase propagation delay and reduce edge slew rate; for 100 pF loads, delay may exceed 8 ns at 5 V. For heavier loads, buffer stages or lower-capacitance routing should be used to maintain timing integrity in the MC74AC11MELG-based design.

Does MC74AC11MELG require external pull-up or pull-down resistors on unused inputs?

No, MC74AC11MELG does not require external termination on unused inputs because its CMOS inputs have extremely low leakage (±1.0 µA max) and high impedance. However, to prevent floating inputs from causing erratic output states or increased ICC due to intermediate voltage levels, unused inputs must be tied to either VCC or GND - a hard-wired connection, not left open. This practice ensures predictable logic behavior and minimizes power consumption in the MC74AC11MELG device.