onsemi MC74VHC32DR2

Overview

MC74VHC32DR2 from onsemi is a high-speed CMOS quad 2-input OR gate in SOIC-14 package, operating from 2.0 V to 5.5 V, delivering 3.8 ns typical propagation delay at 5.0 V and full 5.0 V CMOS-level output swings. It supports level translation between 3.3 V and 5.0 V systems and tolerates input voltages up to 5.5 V, making it suitable for mixed-voltage logic interfacing in industrial control and automotive body electronics.

For engineers reviewing the MC74VHC32DR2 datasheet, pinout, applications, or equivalent options, key selection considerations include its TTL-incompatible CMOS-input logic family, −Q automotive qualification, SOIC-14 thermal resistance (116 °C/W), and compatibility with 15 pF/50 pF load conditions per AC specs.

Technical Context

The MC74VHC32DR2 implements four independent OR gates (Y = A + B) using silicon-gate CMOS technology, with three-stage internal circuitry including a buffer output stage that ensures high noise immunity (VNIH/VNIL = 28% VCC) and stable switching. Its inputs are standard CMOS-compatible-unlike the TTL-compatible MC74VHCT32A variant-and tolerate overvoltage up to 5.5 V regardless of supply state.

It features power-down protection on all inputs, balanced propagation delays across channels, and latchup immunity exceeding 100 mA. The device is Pb-free, RoHS-compliant, and qualified to AEC-Q100 for automotive applications under the −Q suffix designation.

Key Specifications

Pinout & Package

MC74VHC32DR2 is housed in a 14-lead SOIC package (Case 751A), with 1.27 mm pitch, 8.55–8.75 mm body width, and 1.35–1.75 mm height. Thermal resistance is 116 °C/W (JA) on FR4 board per JESD51-7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC74VHC32DTG, MC74VHC32DR2 offers lower thermal resistance and proven manufacturability in SOIC assembly lines; versus SN74LVC32APWR, it delivers superior input overvoltage resilience and automotive qualification-but requires CMOS-level driving sources.

Availability

MC74VHC32DR2 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and legacy system upgrades requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for MC74VHC32DR2 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 MC74VHC32DR2 belongs to the VHC (Very High Speed CMOS) logic family, designed for high-speed, low-power discrete logic functions in mixed-voltage embedded systems where reliability and wide operating range are critical.

FAQ

What is the maximum operating temperature for MC74VHC32DR2?

The MC74VHC32DR2 is rated for operation from −55°C to +125°C, with full electrical performance guaranteed across this range. Its AEC-Q100 qualification confirms suitability for under-hood automotive applications where ambient temperatures exceed 105°C. The SOIC-14 package's thermal resistance (116 °C/W) must be considered in worst-case power dissipation calculations to ensure junction temperature remains below 150°C.

Does MC74VHC32DR2 support 3.3 V-only operation?

Yes, MC74VHC32DR2 operates reliably at VCC = 3.3 V, with propagation delay of 5.5 ns (typical) at CL = 15 pF and full logic swing from 0 V to 3.3 V. Input thresholds scale with VCC (VIH ≥ 0.7 × VCC), ensuring clean switching with 3.3 V CMOS drivers. It does not accept TTL-level inputs-those require the MC74VHCT32A variant instead.

Is MC74VHC32DR2 pin-compatible with older 74HC32 devices?

Yes, MC74VHC32DR2 is pin- and function-compatible with industry-standard 74HC32 and 74HCT32 devices in SOIC-14 packages. Pin assignments (1–14), logic function (quad 2-input OR), and DC/AC electrical behavior align directly-enabling drop-in replacement in existing designs while offering improved speed (3.8 ns vs. ~15 ns for HC) and lower ICC.

What does the "−Q" suffix in MC74VHC32DR2G−Q* indicate?

The "−Q" suffix denotes an automotive-grade version meeting AEC-Q100 stress testing requirements and supporting PPAP documentation. It reflects unique site and process controls-including enhanced traceability, lot-level qualification, and extended reliability testing-for use in safety-critical vehicle subsystems. The "*" indicates compliance with additional automotive change control protocols beyond standard qualification.

Can MC74VHC32DR2 drive a 50 pF load at 5 MHz without signal degradation?

Yes, MC74VHC32DR2 is characterized for CL = 50 pF loads, with propagation delay of 6.5 ns (max) at VCC = 5.0 V and 5.5 ns (max) at VCC = 3.3 V. At 5 MHz (200 ns period), timing margins remain ample. Output drive strength (±8 mA) ensures adequate slew rate, and low-noise design (VOLP ≤ 0.8 V) prevents excessive ringing or ground bounce in properly decoupled layouts.