onsemi 74LVX32M

Overview

74LVX32M from onsemi is a low-voltage quad 2-input OR gate IC designed for level-translating logic interfaces between 5 V and 3.3 V systems. It operates from 2.0 V to 3.6 V, tolerates input voltages up to 6.5 V, delivers ±25 mA output drive, and features guaranteed simultaneous switching noise immunity. It is used in mixed-voltage digital control subsystems such as industrial I/O modules and embedded microcontroller peripheral interfacing.

For engineers reviewing the 74LVX32M datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.5 V-tolerant inputs, TSSOP-14 WB package, sub-7 ns propagation delay at 3.3 V, dual-rail noise performance, and compatibility with 3.3 V CMOS logic families.

Technical Context

The 74LVX32M implements four independent OR gates in a single monolithic CMOS structure, each with rail-to-rail input voltage tolerance (−0.5 V to 6.5 V) and output swing limited to VCC + 0.5 V. Its design enables bidirectional level translation without external biasing - inputs accept 5 V signals while outputs swing fully within 3.3 V logic thresholds.

It meets stringent dynamic noise specifications: quiet-output VOLP ≤ 0.5 V and VIL(D) ≤ 0.8 V at 3.3 V/50 pF, ensuring robust operation in electrically noisy environments. Propagation delays are characterized across temperature (−40°C to +85°C) and supply (2.0–3.6 V), with skew between outputs ≤ 1.5 ns.

Key Specifications

Pinout & Package

TSSOP-14 WB (Case 948G), 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, Pb-free and halide-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC32PW,118 and SN74AUP1G32DBVR, the 74LVX32M uniquely combines quad-gate density, 6.5 V input tolerance, and industrial temperature rating - making it the only option among the three capable of direct 5 V-to-3.3 V translation without ancillary components.

Availability

74LVX32M is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller GPIO level translation, and automotive body control module designs requiring stable component supply, long-term lifecycle support, and consistent Pb-free manufacturing compliance.

Supply support for 74LVX32M 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 LVX logic family - including the 74LVX32M - was engineered specifically for mixed-voltage system interoperability, emphasizing input overvoltage tolerance, low-noise switching, and industrial reliability without sacrificing speed or power efficiency.

FAQ

What is the maximum input voltage the 74LVX32M can safely accept?

The 74LVX32M supports DC input voltages from −0.5 V to 6.5 V, independent of VCC. This allows direct connection to 5 V logic sources without damage or level-shifting components. Operation above 6.5 V risks permanent damage per Absolute Maximum Ratings, and sustained exposure near this limit requires thermal derating verification.

Does the 74LVX32M require external pull-up or pull-down resistors on unused inputs?

Yes - per datasheet Note 1, all unused inputs of the 74LVX32M must be held HIGH or LOW; floating inputs are prohibited. This prevents increased ICC, erratic output behavior, and potential latch-up due to undefined internal node states. A 10 kΩ pull-up to VCC or pull-down to GND is recommended for stability.

Can the 74LVX32M drive a 50 pF capacitive load at full speed?

Yes - the 74LVX32M's AC Electrical Characteristics specify tPLH/tPHL up to 11.5 ns at 3.3 V with CL = 50 pF and TA = −40°C to +85°C. This confirms full-speed operation into typical PCB trace + input capacitance loads without timing violation in industrial control applications.

Is the 74LVX32M pin-compatible with standard 74-series OR gates like the 74HC32?

No - the 74LVX32M uses a TSSOP-14 WB package (Case 948G) with 0.65 mm pitch, whereas the 74HC32 typically uses SOIC-14 (1.27 mm pitch) or PDIP-14. Pin functions match the industry-standard 74xx32 logic assignment, but physical layout and soldering requirements differ significantly; PCB redesign is required for substitution.

What is the typical power dissipation of the 74LVX32M during active operation?

The 74LVX32M exhibits CPD = 14 pF (Power Dissipation Capacitance), yielding typical active ICC ≈ 1.5 mA at 3.3 V and 10 MHz toggle rate per gate. Total device consumption remains under 6 mA at full activity - well within its 833 mW absolute maximum rating and suitable for thermally constrained enclosures.