onsemi MC74VHC1GT32DF2G

Overview

MC74VHC1GT32DF2G from onsemi is a single 2-input OR gate in SC-88A (SOT-353) package, designed for logic-level translation between 1.8 V, 3.0 V, and 5.0 V domains. It delivers t_PD = 3.5 ns (typ) at V_CC = 5.0 V, supports rail-to-rail CMOS output swing (V_OH > 0.8V_CC, V_OL < 0.1V_CC), and features ±7.0 V input overvoltage tolerance-enabling robust interfacing in mixed-voltage industrial control and sensor interface systems.

For engineers reviewing the MC74VHC1GT32DF2G datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible inputs (V_IL = 0.8 V, V_IH = 2.0 V), 3.0–5.5 V operating range, power-down protection, and SC-88A footprint compatibility with space-constrained PCB layouts.

Technical Context

The MC74VHC1GT32DF2G implements a three-stage CMOS buffer architecture to ensure high noise immunity and stable output drive. Its input structure tolerates up to 7.0 V regardless of V_CC, enabling safe level shifting from lower-voltage logic (e.g., 1.8 V or 3.0 V) to 5.0 V CMOS outputs while powered from the higher rail.

Output stages remain protected even when V_CC = 0 V, supporting hot-insertion and battery-backup scenarios. The device meets ESD ratings >2000 V (HBM) and exhibits latch-up immunity of ±500 mA per I/O at 125°C-critical for reliability in automotive body electronics and industrial PLC I/O modules.

Key Specifications

Pinout & Package

MC74VHC1GT32DF2G uses the SC-88A (SOT-353) 5-pin surface-mount package (Case 419A), measuring 2.20 × 1.35 × 1.10 mm with 0.65 mm pitch. This ultra-compact footprint supports high-density routing in portable and IoT edge devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G32DBVR and 74AUP1G32GW,125, the MC74VHC1GT32DF2G uniquely balances 3.5 ns speed, 7.0 V input tolerance, and −55°C to +125°C operation-making it the only option among the three qualified for harsh-environment mixed-voltage signal conditioning without external protection components.

Availability

MC74VHC1GT32DF2G is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and portable medical devices requiring stable component supply across extended temperature ranges and mixed-voltage architectures.

Supply support for MC74VHC1GT32DF2G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The MC74VHC1GT32DF2G belongs to the VHC1G ultra-small logic family, engineered specifically for space-constrained, mixed-voltage digital interfacing in mission-critical embedded systems.

FAQ

What is the maximum input voltage rating for MC74VHC1GT32DF2G, and does it depend on V_CC?

The MC74VHC1GT32DF2G supports DC input voltages from −0.5 V to +7.0 V on any input pin, regardless of the applied V_CC value. This overvoltage tolerance is intrinsic to its input protection structure and enables safe interfacing of 5 V signals while operating at 3.3 V or 1.8 V supplies-no external clamping diodes required. This specification is verified per the manufacturer's datasheet Absolute Maximum Ratings table.

Can MC74VHC1GT32DF2G operate with a 3.3 V supply while accepting 5 V inputs, and what output voltage swing results?

Yes, MC74VHC1GT32DF2G can operate with V_CC = 3.3 V while safely accepting 5 V inputs due to its 7.0 V input tolerance. When powered at 3.3 V, the output swing is rail-to-rail: V_OH ≥ 2.64 V (0.8 × 3.3 V) and V_OL ≤ 0.33 V (0.1 × 3.3 V) under 4 mA load-ensuring clean logic-level translation to downstream 3.3 V receivers.

What package type and dimensions does MC74VHC1GT32DF2G use, and is it RoHS compliant?

MC74VHC1GT32DF2G uses the SC-88A (SOT-353) package, measuring 2.20 mm × 1.35 mm × 1.10 mm with 0.65 mm lead pitch. It is Pb-free and RoHS compliant, qualified for lead-free reflow soldering with peak temperature up to 260°C. The "G" suffix in the part number explicitly denotes the Pb-free variant per onsemi's ordering nomenclature.

Does MC74VHC1GT32DF2G provide power-down protection, and how does it behave when V_CC = 0 V?

Yes, MC74VHC1GT32DF2G includes power-down protection on both inputs and outputs. When V_CC = 0 V, all I/O pins enter a high-impedance, non-destructive state-even if input or output voltages up to ±0.5 V are present. This prevents back-powering, latch-up, or damage during hot insertion, battery backup transitions, or partial system power-down, as confirmed in the datasheet's Absolute Maximum Ratings and Recommended Operating Conditions sections.

What is the typical propagation delay of MC74VHC1GT32DF2G at 5.0 V supply, and how does it vary with load capacitance?

The typical propagation delay (t_PD) of MC74VHC1GT32DF2G is 3.5 ns at V_CC = 5.0 V with C_L = 15 pF. At C_L = 50 pF, t_PD increases to 4.4 ns (typ). These values are measured under controlled AC test conditions (input rise/fall time = 3.0 ns) and reflect real-world performance in compact PCB layouts with moderate capacitive loading-critical for timing budget allocation in high-speed digital subsystems.