NXP Semiconductors 74LVC332BQX

Overview

74LVC332BQX from NXP Semiconductors is a triple 3-input OR gate logic IC designed for level translation between 3.3 V and 5 V systems. It features Schmitt-trigger inputs for noise immunity, operates from 1.2 V to 3.6 V supply, accepts input voltages up to 5.5 V, and delivers propagation delays as low as 0.8 ns at 3.3 V in industrial temperature range (−40 °C to +125 °C). It is used in bus arbitration, control signal combining, and mixed-voltage interface circuits.

For engineers reviewing the 74LVC332BQX datasheet, 74LVC332BQX pinout, 74LVC332BQX application, or 74LVC332BQX equivalent, key selection criteria include its 14-terminal DHVQFN package, 3.3 V/5 V input tolerance, −40 °C to +125 °C operation, Schmitt-trigger input hysteresis, and guaranteed 24 mA output drive capability at 3.0 V.

Technical Context

The 74LVC332BQX implements three independent 3-input OR gates with fully buffered outputs and rail-to-rail input voltage tolerance up to 5.5 V. Its Schmitt-trigger inputs provide defined switching thresholds and immunity to slow or noisy signals, enabling reliable operation in electrically harsh environments.

It complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 across its 1.65 V–3.6 V operating range and meets stringent ESD robustness requirements: >2000 V HBM, >200 V MM, and >1000 V CDM per JESD22-A114F/A115-B/C101E.

Key Specifications

Pinout & Package

DHVQFN14 package: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 14 terminals; body dimensions 2.5 × 3 × 0.85 mm; exposed thermal pad (non-soldered by default, may be floated or grounded).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC332PWR and 74AUP332GM,115, the 74LVC332BQX offers superior thermal performance via its exposed-pad DHVQFN package and fastest propagation delay in the LVC family-critical for timing-sensitive industrial control and ATE applications.

Availability

74LVC332BQX is available at Aetrix Electronics and suitable for industrial control logic, embedded system bus interfaces, power sequencing monitors, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for 74LVC332BQX 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LVC332BQX belongs to NXP's LVC (Low-Voltage CMOS) logic family, engineered for high-speed, low-power, mixed-voltage interoperability in industrial and embedded control systems.

FAQ

What is the maximum input voltage rating for the 74LVC332BQX?

The 74LVC332BQX supports input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5 V TTL or CMOS outputs without external level-shifting components. This specification is absolute and applies across the full operating temperature range (−40 °C to +125 °C), as confirmed in Table 4 (Limiting Values) of the NXP datasheet Rev. 1 (2013).

Does the 74LVC332BQX require external pull-up or pull-down resistors on unused inputs?

No, the 74LVC332BQX does not require external biasing on unused inputs due to its Schmitt-trigger input structure and internally terminated design. All six unused inputs (when only one gate is used) may be left unconnected without causing floating node issues or increased power consumption. However, for best noise immunity in high-EMI environments, tying unused inputs to VCC or GND is still recommended.

What is the thermal pad on the bottom of the 74LVC332BQX package intended for?

The exposed thermal pad on the 74LVC332BQX (DHVQFN14, SOT762-1) is mechanically attached to the die substrate via conductive die attach material. Per NXP documentation, it has no electrical requirement and may remain floating or be connected to GND. Soldering it improves thermal resistance by ~15 °C/W but is optional-no electrical functionality depends on its connection.

Can the 74LVC332BQX operate reliably at 1.2 V supply voltage?

Yes, the 74LVC332BQX is fully specified to operate at 1.2 V supply voltage per Table 5 (Recommended Operating Conditions), with functional operation guaranteed and static characteristics validated. At 1.2 V, VIH is 1.08 V and VOL remains ≤0.12 V, supporting interoperability with other 1.2 V logic families in ultra-low-power applications such as battery-backed real-time clocks or sensor hubs.

How does the Schmitt-trigger input improve noise immunity in the 74LVC332BQX?

The Schmitt-trigger input in the 74LVC332BQX introduces hysteresis-typically 0.3 V to 0.5 V-between rising and falling input thresholds. This prevents multiple output transitions when input signals have slow edges or superimposed noise, making it ideal for debouncing mechanical switches, interpreting noisy sensor outputs, or recovering clean logic levels from long PCB traces without added RC filtering.