onsemi 74LVX32MX

Overview

74LVX32MX from onsemi is a low-voltage quad 2-input OR gate IC designed for level-translating logic interfacing between 5 V and 3.3 V systems. It features 14-pin TSSOP-WB packaging, operates from 2.0 V to 3.6 V supply, supports input voltages up to 6.5 V, delivers ±25 mA output drive, and guarantees simultaneous switching noise performance for industrial digital control applications.

For engineers reviewing the 74LVX32MX datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.5 V-tolerant inputs, sub-7 ns propagation delay at 3.3 V, ±1.5 ns output skew, 4 pF input capacitance, and guaranteed dynamic threshold behavior across −40°C to +85°C.

Technical Context

The 74LVX32MX implements four independent CMOS-based OR gates in a single monolithic IC, with each gate accepting two inputs and producing one active-high output. Its input structure includes clamp diodes enabling 5 V–to–3.3 V voltage-level translation without external components.

It is characterized for operation under recommended conditions: VCC = 2.0–3.6 V, VI = 0–5.5 V, and TA = −40°C to +85°C. Unused inputs must be tied HIGH or LOW-floating inputs are prohibited per design specification.

Key Specifications

Pinout & Package

74LVX32MX is housed in a 14-pin Thin Shrink Small Outline Package – Wide Body (TSSOP−14 WB), case 948G, with 0.65 mm pitch and Pb-free, halide-free construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR gate logic applications.

Compared with 74LVX32MX, the 74LVC32PW lacks 5 V input tolerance and requires redesign for mixed-voltage interfaces, while SN74AUP1G32DBVR offers superior quiescent current but increases component count and layout complexity for quad-function needs.

Availability

74LVX32MX is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and guaranteed parametric consistency across production batches.

Supply support for 74LVX32MX 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The LVX logic family-including 74LVX32MX-is engineered specifically for mixed-voltage system interfacing, emphasizing robust level translation, low-noise switching, and industrial temperature resilience.

FAQ

What is the maximum input voltage the 74LVX32MX can tolerate?

The 74LVX32MX accepts DC input voltages up to 5.5 V across its entire operating temperature range, independent of VCC. This 5.5 V tolerance is explicitly specified in the Recommended Operating Conditions table and enables safe interfacing with standard 5 V TTL and CMOS outputs without external protection circuitry. The absolute maximum rating extends to 6.5 V, but sustained operation above 5.5 V is not recommended per datasheet guidance.

Does the 74LVX32MX support operation at 2.0 V supply?

Yes, the 74LVX32MX is fully specified and functional at VCC = 2.0 V, as confirmed in the Recommended Operating Conditions table. At this minimum supply, it maintains valid logic thresholds (VIH = 1.5 V, VIL = 0.5 V), delivers guaranteed output drive (VOH ≥ 1.9 V, VOL ≤ 0.1 V), and meets AC timing specifications including propagation delay and skew. This makes 74LVX32MX suitable for battery-powered or energy-harvesting systems where rail voltage may dip near 2.0 V.

Is the 74LVX32MX pin-compatible with standard 74HC32 or 74LS32 devices?

No, the 74LVX32MX uses a 14-pin TSSOP−14 WB package with a specific pinout optimized for its dual-rail interface capability-not the 14-pin SOIC or DIP layouts used by 74HC32 or 74LS32. While logical function (quad 2-input OR) matches, physical pin assignments differ significantly: for example, 74LVX32MX places GND at pin 7 and VCC at pin 14, whereas 74HC32 uses pin 7 for GND and pin 14 for VCC but assigns inputs/outputs to different pins. Direct PCB replacement is not possible without layout revision.

What is the typical power dissipation of the 74LVX32MX at 3.3 V?

At VCC = 3.3 V and TA = 25°C, the 74LVX32MX exhibits a typical quiescent supply current (ICC) of less than 2.0 μA, resulting in negligible static power dissipation. Dynamic power depends on switching frequency and load capacitance; using CPD = 14 pF (per gate), average operating current at 10 MHz and CL = 15 pF is approximately 0.46 mA per gate, yielding ~1.5 mW total for all four gates. This low power profile supports thermally constrained applications such as handheld diagnostics and dense PCB layouts.

Can unused inputs on the 74LVX32MX be left floating?

No-unused inputs on the 74LVX32MX must be actively tied HIGH or LOW, as explicitly stated in Note 1 of the Recommended Operating Conditions section. Floating inputs risk metastability, increased ICC, erratic output behavior, and elevated electromagnetic emissions due to undefined internal node voltages. The device does not include internal pull-up or pull-down resistors; external termination (e.g., 10 kΩ to VCC or GND) is required for any unconnected A or B input pins to ensure predictable 74LVX32MX operation and long-term reliability.