onsemi MC74LVX08MELG

Overview

MC74LVX08MELG from onsemi is a quad 2-input AND gate IC designed for level-translating logic interfacing between 3.0 V and 5.0 V systems. It features 5 V-tolerant inputs (up to 6.5 V), 4.8 ns typical propagation delay at 3.3 V, ±25 mA output drive, and operates across −40 °C to +85 °C. It is used in mixed-voltage digital control subsystems such as industrial I/O modules and embedded microcontroller peripheral interfaces.

For engineers reviewing the MC74LVX08MELG datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage tolerance, propagation delay consistency across gates, output drive capability under 3.3 V supply, and SOIC-14 package compatibility with legacy 74-series footprint layouts.

Technical Context

The MC74LVX08MELG implements four independent 2-input AND functions using advanced high-speed CMOS technology. Each gate supports rail-to-rail input swing up to 6.5 V while powered from 2.0–3.6 V, enabling robust 3.3 V core logic to interface with 5 V peripherals without external level shifters.

It delivers balanced tPLH/tPHL propagation delays (≤12.0 ns max at 3.3 V, 50 pF load) and low output skew (≤1.5 ns), ensuring deterministic timing in synchronous control paths. Input protection includes power-down safe clamping and ESD robustness >2000 V HBM.

Key Specifications

Pinout & Package

MC74LVX08MELG is packaged in a 14-lead SOIC-NB (case 751A), 3.9 mm body width, with standard 1.27 mm pitch. Pin 1 is index-marked; pin 7 is GND and pin 14 is VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Compared with SN74LVC08APWR and 74AHC08D,118, the MC74LVX08MELG uniquely enables true 3.3 V core logic to safely accept 5 V inputs without redesign - a capability neither alternative provides without added components or supply changes.

Availability

MC74LVX08MELG is available at Aetrix Electronics and suitable for industrial automation, embedded control, and test equipment requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for MC74LVX08MELG 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 delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74LVX08MELG belongs to the LVX low-voltage logic family, engineered specifically for mixed-voltage system interfacing with emphasis on 5 V-tolerant inputs, low static current, and industrial temperature reliability.

FAQ

What is the maximum input voltage the MC74LVX08MELG can tolerate while operating from a 3.3 V supply?

The MC74LVX08MELG supports DC input voltages from −0.5 V to +6.5 V regardless of VCC setting, meaning it safely accepts 5 V logic signals even when powered at 3.3 V. This eliminates external level-shifting components and simplifies interconnection with legacy 5 V peripherals in modern 3.3 V systems. The MC74LVX08MELG achieves this via integrated input clamping diodes and robust oxide design.

Does the MC74LVX08MELG support operation at 2.0 V supply, and what performance trade-offs apply?

Yes, the MC74LVX08MELG is fully specified down to VCC = 2.0 V, with VIH = 1.5 V and VOL = 0.44 V (max) at 4 mA load. Propagation delay increases to 13.5 ns (max) at 2.7 V/50 pF, so timing-critical paths should be validated at minimum VCC. The MC74LVX08MELG maintains full functionality and 5 V input tolerance across its entire 2.0–3.6 V operating range.

Is the MC74LVX08MELG pin-compatible with standard 74-series AND gates like the 74HC08?

The MC74LVX08MELG uses the same 14-pin SOIC footprint and identical pinout as the 74HC08 and 74LS08, including VCC on pin 14 and GND on pin 7. However, unlike those families, the MC74LVX08MELG offers 5 V-tolerant inputs and lower ICC - making it a functional upgrade, not just a drop-in replacement. The MC74LVX08MELG retains full pin and function compatibility while adding voltage-domain bridging capability.

What is the output drive capability of the MC74LVX08MELG, and how many 74LVC inputs can one output drive?

The MC74LVX08MELG delivers ±25 mA per output, sufficient to drive ≥10 standard 74LVC inputs (each drawing ~1 µA static, ~10 pF capacitive load) at 3.3 V while maintaining VOL < 0.44 V and VOH > 2.48 V. At 25 mA sink, VOL remains ≤0.36 V, supporting robust fanout in dense logic arrays. The MC74LVX08MELG's drive strength exceeds most 3.3 V logic families, easing interface design.

How does the MC74LVX08MELG handle unused inputs, and is termination required?

Unused inputs on the MC74LVX08MELG must be tied to VCC or GND - floating inputs cause increased ICC, noise susceptibility, and potential oscillation due to CMOS threshold sensitivity. No pull-up/pull-down resistors are required beyond direct connection; 10 kΩ is acceptable but unnecessary. All four gates remain fully functional regardless of other gate usage. The MC74LVX08MELG exhibits no latch-up risk under proper biasing, with latchup immunity >300 mA.