onsemi MC74LVX240DWR2G

Overview

MC74LVX240DWR2G from onsemi is an advanced high-speed CMOS octal bus buffer with inverting 3-state outputs, dual active-low output enables (1OE, 2OE), and 5V-tolerant inputs up to 7.0 V. It supports level-shifting between 3.0 V and 5.0 V systems, delivers 4.3 ns typical propagation delay at 3.3 V, and operates across −40 °C to +85 °C for industrial bus interfacing.

For engineers reviewing the MC74LVX240DWR2G datasheet, pinout, applications, or equivalent options, key selection criteria include 3-state timing (tPLZ/tPHZ ≤ 13.0 ns), input voltage tolerance (0–5.5 V), output drive capability (±25 mA), and SOIC-20 package compatibility with legacy LVX logic families.

Technical Context

The MC74LVX240DWR2G implements two independent 4-bit inverting buffers, each controlled by its own active-low enable (1OE for channels 1D0–1D3/1O0–1O3; 2OE for 2D0–2D3/2O0–2O3). All inputs tolerate 5.0 V signals while powered from a 2.0–3.6 V supply, enabling safe interfacing with higher-voltage peripherals without external level shifters.

Its 3-state outputs exhibit balanced propagation delays (tPLH/tPHL matching within 1.5 ns skew), low dynamic noise (VOLP ≤ 0.8 V), and power-down input protection. The device meets ESD standards (>2000 V HBM) and latchup immunity (>300 mA), supporting robust operation in noisy industrial environments.

Key Specifications

Pinout & Package

MC74LVX240DWR2G uses a 20-pin SOIC wide-body (Case 751D) package with standard 1.27 mm pitch, 7.5 mm body width, and Pb-free finish. Pin 1 is marked with a notch or dot; pin numbering follows standard SOIC top-view convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal inverting buffer applications.

Compared with SN74LVC240APWR and 74LVX240M, the MC74LVX240DWR2G uniquely combines 5 V input tolerance with SOIC-20 packaging and Pb-free compliance-making it optimal for new industrial designs requiring mixed-voltage interoperability and surface-mount manufacturability.

Availability

MC74LVX240DWR2G is available at Aetrix Electronics and suitable for industrial control systems, test equipment interfaces, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MC74LVX240DWR2G 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, and IoT applications.

The MC74LVX240DWR2G belongs to the LVX low-voltage logic family, designed specifically for mixed-voltage system interfacing and high-reliability industrial bus buffering with extended voltage tolerance and robust ESD performance.

FAQ

What is the maximum input voltage rating for MC74LVX240DWR2G?

The MC74LVX240DWR2G supports DC input voltages from −0.5 V to +7.0 V, allowing safe interfacing with 5 V logic signals while operating from a 3.3 V supply. This 5 V-tolerant feature is confirmed in the Maximum Ratings table of the official onsemi datasheet (Rev. 5, November 2024), eliminating the need for external level-shifting circuitry in mixed-voltage designs involving the MC74LVX240DWR2G.

Does MC74LVX240DWR2G support true 3-state operation with independent enable controls?

Yes, the MC74LVX240DWR2G provides two independent active-low output enables (1OE and 2OE), each controlling a separate 4-bit inverting buffer section. When either enable is HIGH, its corresponding outputs enter high-impedance state with leakage ≤ ±2.5 µA. This architecture enables flexible bus arbitration and modular signal routing in systems using the MC74LVX240DWR2G.

What is the typical propagation delay of MC74LVX240DWR2G at 3.3 V supply?

The MC74LVX240DWR2G exhibits a typical propagation delay (tPD) of 4.3 ns at VCC = 3.3 V with CL = 15 pF, as specified in the AC Electrical Characteristics table of the onsemi datasheet. This value applies to both rising and falling edges and is measured under standardized test conditions, making the MC74LVX240DWR2G suitable for high-speed bus applications up to ~100 MHz with appropriate timing margins.

Is MC74LVX240DWR2G compatible with standard SOIC-20 footprints?

Yes, the MC74LVX240DWR2G uses the SOIC-20 wide-body package (Case 751D) with 1.27 mm pitch and 7.5 mm body width. Its mechanical dimensions-including pin spacing, pad layout, and thermal pad absence-are fully compatible with industry-standard SOIC-20 land patterns, ensuring drop-in placement on PCBs designed for similar logic devices without layout modification for the MC74LVX240DWR2G.

What are the ESD and latchup ratings for MC74LVX240DWR2G?

The MC74LVX240DWR2G is rated for Human Body Model (HBM) ESD > 2000 V and Machine Model (MM) > 200 V, with latchup performance exceeding 300 mA per JEDEC JESD78. These values are verified per onsemi's qualification testing and documented in the Features section of the MC74LVX240DWR2G datasheet, confirming robustness for handling and operation in industrial environments where the MC74LVX240DWR2G is deployed.