NXP Semiconductors 74HC32D/AUJ

Overview

74HC32D/AUJ from Nexperia is a quad 2-input OR gate in SO14 (SOT108-1) package, operating from 2.0 V to 6.0 V supply, with propagation delay of 6–27 ns at 4.5–6.0 V and input clamp diodes enabling overvoltage-tolerant interfacing. It delivers symmetrical output impedance, balanced propagation delays, and supports industrial temperature range (−40 °C to +125 °C). This device serves as a fundamental combinational logic element in digital control, signal routing, and bus arbitration circuits.

For engineers reviewing the 74HC32D/AUJ datasheet, 74HC32D/AUJ pinout, 74HC32D/AUJ application, or 74HC32D/AUJ equivalent, this page provides verified functional identity, validated SO14 pin mapping, confirmed static/dynamic electrical specs per Rev. 10 (April 2025), and two rigorously cross-referenced alternative parts for TTL- and CMOS-level compatible designs.

Technical Context

The 74HC32D/AUJ implements four independent CMOS-based OR gates with Schmitt-trigger–free inputs and rail-to-rail output swing. Each gate accepts two inputs (nA, nB) and drives one output (nY) with identical HIGH/LOW propagation delays (tPHL = tPLH) and matched transition times (tTHL = tTLH).

Input clamp diodes allow safe interface to voltages exceeding VCC when used with current-limiting resistors. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), and meets HBM ESD >2000 V and CDM >1000 V per JS-001/JS-002.

Key Specifications

Pinout & Package

74HC32D/AUJ uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, and standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input OR gate applications.

Compared with 74HC32D/AUJ, 74HCT32D offers TTL input compatibility at the cost of reduced noise margin, while SN74HC32DR provides identical CMOS functionality with minor thermal specification variance - both require no PCB changes but differ in input threshold behavior and absolute maximum power dissipation limits.

Availability

74HC32D/AUJ is available at Aetrix Electronics and suitable for industrial control, sensor interface, and digital logic consolidation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 74HC32D/AUJ 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete devices, with leadership in automotive-qualified and industrial-grade components.

The 74HC32D/AUJ belongs to Nexperia's 74HC logic family, engineered for robust, low-power, wide-supply digital interfacing in harsh environments - targeting industrial automation, building controls, and infrastructure equipment.

FAQ

What logic family and voltage compatibility does 74HC32D/AUJ support?

74HC32D/AUJ belongs to the high-speed CMOS (74HC) logic family and operates from 2.0 V to 6.0 V. Its inputs accept CMOS-level signals (VIH ≥ 3.15 V at VCC = 4.5 V), making it compatible with 3.3 V and 5 V systems. It is not TTL-input compatible - for that, use 74HCT32D. The 74HC32D/AUJ datasheet (Rev. 10, April 2025) confirms full compliance with JEDEC JESD7A and JESD8C standards.

Does 74HC32D/AUJ include input protection features?

Yes, 74HC32D/AUJ integrates input clamp diodes on all inputs (pins 1, 2, 4, 5, 9, 10, 12, 13), enabling safe interface to voltages up to VCC + 0.5 V when used with external current-limiting resistors. This feature is explicitly documented in Section 1 (General description) and Table 4 (Limiting values) of the 74HC32D/AUJ datasheet, supporting robust design in mixed-voltage or hot-swap scenarios.

What is the maximum propagation delay of 74HC32D/AUJ at 5 V supply?

At VCC = 5.0 V and CL = 15 pF, the 74HC32D/AUJ exhibits a typical propagation delay of 6 ns with a maximum of 18 ns over the full −40 °C to +125 °C temperature range (Table 7, Dynamic characteristics). This value applies to both tPLH and tPHL transitions and is measured per gate with defined test conditions per Figure 4 and Table 8 of the official 74HC32D/AUJ datasheet.

Is 74HC32D/AUJ pin-compatible with other package variants like TSSOP or QFN?

No - while 74HC32D/AUJ (SO14/SOT108-1), 74HC32PW (TSSOP14), and 74HC32BQ (DHVQFN14) share identical logic functionality and pin numbering, their physical footprints, pad layouts, and thermal characteristics differ significantly. The 74HC32D/AUJ requires the SO14 land pattern per Figure 6; substitution with PW or BQ variants demands PCB redesign and requalification due to mechanical and thermal mismatch.

What is the operating temperature range certified for 74HC32D/AUJ?

The 74HC32D/AUJ is fully specified and tested over −40 °C to +125 °C, as confirmed in Table 1 (Ordering information) and Table 5 (Recommended operating conditions) of the Nexperia 74HC32D/AUJ datasheet (Rev. 10). This extended industrial grade rating supports deployment in engine compartments, factory-floor controllers, and outdoor infrastructure where ambient extremes exceed commercial-grade limits.