onsemi MC74VHC1GT32DF1G

Overview

MC74VHC1GT32DF1G 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 CMOS systems. 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 tolerates input voltages up to 7.0 V independent of supply - enabling robust 3.0 V ↔ 5.0 V interfacing in mixed-voltage embedded control.

For engineers reviewing the MC74VHC1GT32DF1G datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible inputs (V_IL = 0.8 V, V_IH = 2.0 V), overvoltage-tolerant I/O architecture, ±500 mA latch-up immunity, and Pb-free SC-88A packaging suitable for space-constrained industrial and automotive signal routing.

Technical Context

This device implements a three-stage CMOS buffer architecture with dedicated input protection diodes and powered-off output clamping, ensuring safe operation during hot insertion, battery backup transitions, and supply sequencing mismatches. Its input structure allows 7.0 V absolute maximum input voltage regardless of V_CC, while outputs remain protected when V_CC = 0 V.

The logic function conforms to standard positive-logic OR behavior (Y = A + B), with balanced t_PLH/t_PHL propagation delays and full 5.0 V CMOS output swing across 3.0–5.5 V supply range. Input capacitance is limited to 10 pF, supporting clean high-speed switching into 50 pF loads.

Key Specifications

Pinout & Package

MC74VHC1GT32DF1G 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 lead pitch. The package is Pb-free and RoHS-compliant.

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 MC74VHC1GT32DF1G uniquely supports 7.0 V input tolerance at any V_CC ≥3.0 V - making it the only option among the three qualified for mixed 3.3 V/5 V signal routing without external protection.

Availability

MC74VHC1GT32DF1G is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical diagnostic sensor hubs requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for MC74VHC1GT32DF1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74VHC1GT32DF1G belongs to the VHC1G ultra-small logic family, engineered for space-constrained, mixed-voltage digital interfaces where reliability under supply mismatch and hot-insertion conditions is mandatory.

FAQ

What is the maximum input voltage rating for MC74VHC1GT32DF1G?

The MC74VHC1GT32DF1G supports a maximum DC input voltage of 7.0 V, independent of the V_CC supply voltage. This specification is verified per the Absolute Maximum Ratings table in the official datasheet and enables safe interfacing with 5 V buses while operating from lower supply rails such as 3.3 V or 2.5 V. The input protection circuitry ensures no damage occurs even when VIN exceeds V_CC by up to 4.0 V, making MC74VHC1GT32DF1G ideal for mixed-voltage system integration.

Does MC74VHC1GT32DF1G support operation at 3.3 V supply?

Yes, MC74VHC1GT32DF1G is fully specified for operation at V_CC = 3.3 V, with guaranteed performance including t_PD ≤ 7.9 ns (max) at C_L = 50 pF and full CMOS output swing (V_OH > 0.8×3.3 V, V_OL < 0.1×3.3 V). Its recommended operating range spans 3.0 V to 5.5 V, and all DC and AC parameters - including input thresholds (V_IL = 0.53 V, V_IH = 1.4 V at V_CC = 3.0 V) - are characterized across this range. MC74VHC1GT32DF1G maintains compatibility with both 3.3 V LVTTL and 5 V TTL logic families.

What package type does MC74VHC1GT32DF1G use?

MC74VHC1GT32DF1G uses the SC-88A (also known as SOT-353 or SC70-5) 5-pin surface-mount package, designated Case 419A. Its dimensions are 2.20 mm × 1.35 mm × 1.10 mm with a 0.65 mm lead pitch. This Pb-free, RoHS-compliant package is optimized for high-density PCB layouts and supports reflow soldering per J-STD-020. The "DF" suffix in MC74VHC1GT32DF1G explicitly denotes the SC-88A package variant, distinguishing it from the TSOP-5 ("DT") version.

Is MC74VHC1GT32DF1G suitable for hot-plug applications?

Yes, MC74VHC1GT32DF1G is explicitly designed for hot-plug operation. Its input and output structures provide protection when V_CC = 0 V, preventing latch-up or damage during partial power-up sequences. The datasheet confirms this capability under "Power Down Protection Provided on Inputs and Outputs" and validates ±500 mA latch-up immunity per EIA/JESD78 at 125°C. These features make MC74VHC1GT32DF1G appropriate for modular backplane systems, docking stations, and automotive sub-modules where live insertion is required.

What logic function does MC74VHC1GT32DF1G implement?

MC74VHC1GT32DF1G implements a single 2-input positive-logic OR gate function: Y = A + B. Its truth table defines output Y as HIGH whenever input A or input B (or both) is HIGH, and LOW only when both inputs are LOW. This behavior is confirmed in the Function Table on page 2 of the datasheet and is electrically identical to standard 74-series OR gates. The device contains no internal inversion, pull-ups, or configurable logic - MC74VHC1GT32DF1G delivers deterministic, low-latency OR logic in a minimal footprint.