onsemi 74LVQ32SJX

Overview

74LVQ32SJX from Fairchild Semiconductor is a low-voltage quad 2-input OR gate IC operating at 2.0–3.6 V, delivering guaranteed tPLH/tPHL ≤ 10.0 ns (VCC = 3.3 V, CL = 50 pF), VIH = 2.0 V min, VOL = 0.44 V max at IOL = 12 mA, and designed for noise-sensitive 3.3 V digital logic interfacing in industrial control and embedded systems.

For engineers reviewing the 74LVQ32SJX datasheet, pinout, applications, or equivalent options, key selection criteria include simultaneous switching noise immunity, incident-wave switching into 75 Ω transmission lines, pin-to-pin skew ≤ 1.5 ns, and guaranteed dynamic threshold performance across −40°C to +85°C.

Technical Context

The 74LVQ32SJX implements four independent 2-input OR logic functions in a single 14-lead SOP package (EIAJ TYPE II, 5.3 mm wide), with all inputs and outputs referenced to a single 2.0–3.6 V supply. It features rail-to-rail input voltage tolerance (0 V to VCC) and output swing (0 V to VCC), supporting direct interfacing with other 3.3 V CMOS logic families.

Its AC performance is characterized by matched propagation delays (tPLH/tPHL ≤ 10.0 ns) and tightly controlled output-to-output skew (≤ 1.5 ns), enabling reliable timing in synchronous bus structures. Dynamic input thresholds (VIHD = 2.0 V, VILD = 0.8 V at VCC = 3.3 V) and incident-wave switching capability ensure robust signal integrity on controlled-impedance traces.

Key Specifications

Pinout & Package

74LVQ32SJX is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm wide (Package Number M14D), with gull-wing leads and standard 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32APWR and 74AHC32PW,118, the 74LVQ32SJX uniquely delivers verified 75 Ω incident-wave switching and ≤1.5 ns output skew-critical for deterministic timing in test instrumentation and industrial signal aggregation-while maintaining strict 3.3 V noise immunity.

Availability

74LVQ32SJX is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, 3.3 V bus signal conditioning, and high-speed test equipment interface requiring stable component supply, long-term lifecycle support, and guaranteed electrical consistency across production batches.

Supply support for 74LVQ32SJX 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and embedded systems.

The 74LVQ32SJX belongs to the LVQ low-voltage logic family, engineered specifically for noise-resilient, high-speed 3.3 V digital interfacing in electrically harsh environments such as factory automation and test equipment.

FAQ

What is the recommended operating voltage range for the 74LVQ32SJX?

The 74LVQ32SJX is specified to operate reliably from 2.0 V to 3.6 V. This range aligns precisely with standard 3.3 V power rails and provides sufficient margin for typical supply tolerances. Operation outside this range-especially above 3.6 V-may compromise reliability or violate Absolute Maximum Ratings, including potential damage from exceeding VCC = +7.0 V.

Does the 74LVQ32SJX support pin-to-pin compatibility with standard 74LS32 or 74HC32 devices?

No, the 74LVQ32SJX is not pin-to-pin compatible with 74LS32 or 74HC32. While it shares the same 14-pin SOP footprint as the 74LVQ32SJ, its input thresholds, output drive strength, and AC characteristics are optimized for 3.3 V operation-not 5 V TTL or standard CMOS. Direct substitution would require validation of voltage-level compatibility and timing margins in the target circuit.

What does "incident-wave switching into 75 Ω" mean for the 74LVQ32SJX?

"Incident-wave switching into 75 Ω" means the 74LVQ32SJX is tested and guaranteed to launch clean, non-reflected logic transitions onto 75 Ω transmission lines-common in video and RF test interfaces-without requiring external series termination. This capability is confirmed per Note 5 in the datasheet and applies across the full commercial temperature range (−40°C to +85°C).

Can unused inputs on the 74LVQ32SJX be left floating?

No, unused inputs on the 74LVQ32SJX must never be left floating. Per Note 2 in the datasheet, all unused inputs must be actively held HIGH or LOW-typically via pull-up or pull-down resistors-to prevent unpredictable output states, increased power consumption, or oscillation due to noise coupling. Floating inputs violate recommended operating conditions and risk functional failure.

What is the maximum output skew between any two outputs of the 74LVQ32SJX?

The maximum output-to-output skew for the 74LVQ32SJX is guaranteed at ≤ 1.5 ns across the full operating temperature range (−40°C to +85°C), as specified for both tOSHL and tOSLH in the AC Electrical Characteristics table. This parameter ensures time-aligned switching across all four OR gates, which is essential for synchronous signal routing and bus arbitration logic.