Texas Instruments SN74LVC32AQDREP

Overview

SN74LVC32AQDREP from Texas Instruments is a quadruple 2-input positive-OR gate IC designed for 2.7-V to 3.6-V V_CC operation, with 3.8 ns max propagation delay at 3.3 V, 5.5-V tolerant inputs, and –40°C to 125°C extended temperature range. It serves as a level translator in mixed 3.3-V/5-V systems and implements Boolean Y = A + B logic per gate.

For engineers reviewing the SN74LVC32AQDREP datasheet, SN74LVC32AQDREP pinout, SN74LVC32AQDREP application, or SN74LVC32AQDREP equivalent, this device supports high-speed digital logic interfacing, voltage-level translation, and robust noise immunity in automotive and industrial control subsystems where rail-to-rail input compatibility and low-power CMOS performance are required.

Technical Context

The SN74LVC32AQDREP integrates four independent OR gates in a single SOIC-14 package, each implementing positive-logic Y = A + B. Its input structure accepts voltages up to 5.5 V regardless of V_CC, enabling seamless interfacing between 3.3-V logic and legacy 5-V peripherals.

It operates across 2 V–3.6 V supply range with guaranteed switching performance down to 2.7 V, exhibits <0.8 V typical output ground bounce (V_OLP) and >2 V typical output undershoot (V_OHV) at 3.3 V, and meets MIL-STD-883 Class B ESD requirements including 2000-V HBM and 200-V MM.

Key Specifications

Pinout & Package

SN74LVC32AQDREP is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, 8.75 mm × 3.91 mm body size, and 1.75 mm max height. Pin 1 is located at the top-left corner with notch or beveled edge marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32AQDREP, the TSSOP variant offers smaller footprint but no thermal pad, while the Q1 version adds automotive qualification overhead without electrical benefit-making SN74LVC32AQDREP optimal for cost-sensitive, thermally stable industrial applications needing SOIC manufacturability.

Availability

SN74LVC32AQDREP is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, medical equipment power sequencing, and sensor interface hubs requiring stable component supply across extended temperature ranges.

Supply support for SN74LVC32AQDREP 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The SN74LVC32AQDREP belongs to TI's LVC logic family, engineered for low-voltage, high-speed CMOS interoperability in mixed-voltage systems-specifically targeting automotive, industrial, and aerospace applications demanding extended temperature operation and robust ESD immunity.

FAQ

What is the maximum supply voltage for SN74LVC32AQDREP?

The absolute maximum supply voltage (V_CC) for SN74LVC32AQDREP is 6.5 V, but recommended operating range is strictly 2.7 V to 3.6 V. Operating outside this range may cause parametric degradation or reliability issues. The device's 5.5-V input tolerance does not extend to V_CC; exceeding 3.6 V on V_CC violates its design specification and voids guaranteed performance.

Can SN74LVC32AQDREP interface directly with 5-V logic outputs?

Yes, SN74LVC32AQDREP supports 5.5-V tolerant inputs, allowing direct connection to standard 5-V TTL or CMOS outputs without external level-shifting components. This capability is intrinsic to its input structure and is fully characterized across the –40°C to 125°C temperature range, making SN74LVC32AQDREP ideal for bridging legacy 5-V subsystems with modern 3.3-V controllers.

What is the propagation delay of SN74LVC32AQDREP at 2.7 V supply?

At V_CC = 2.7 V, the maximum propagation delay (t_pd) of SN74LVC32AQDREP is 4.4 ns, as specified in the switching characteristics table. This value is measured under standard load conditions (C_L = 50 pF) and reflects worst-case performance across temperature and process variation-critical for timing closure in low-voltage control logic paths.

Does SN74LVC32AQDREP require external pull-up or pull-down resistors on unused inputs?

Yes, all unused inputs of SN74LVC32AQDREP must be held at a valid logic level-either V_CC or GND-to prevent floating nodes that could induce excessive supply current, oscillation, or ESD susceptibility. TI's application report SCBA004 explicitly mandates this practice; leaving inputs unconnected violates recommended operating conditions and risks erratic behavior in SN74LVC32AQDREP operation.

Is SN74LVC32AQDREP pin-compatible with standard SN74LVC32A catalog parts?

Yes, SN74LVC32AQDREP shares identical pinout, functionality, and DC/AC specifications with the commercial SN74LVC32A in SOIC-D package. The "Q" suffix denotes extended temperature qualification (–40°C to 125°C), and "REP" indicates enhanced product reliability per MIL-PRF-38535, but mechanical and electrical interface remains fully compatible-enabling drop-in replacement in existing designs requiring higher environmental robustness.