onsemi MC74VHCT86AMG

Overview

MC74VHCT86AMG from onsemi is a quad 2-input XOR gate with TTL-compatible inputs and full 5 V CMOS output swing, designed for logic-level translation between 1.8 V/3.0 V and 5.0 V domains. It operates from 2.0 V to 5.5 V, delivers 4.8 ns typical propagation delay at 5 V, supports ±25 mA output drive, and features input overvoltage tolerance up to 7 V - enabling robust interfacing in mixed-voltage embedded control systems.

For engineers reviewing the MC74VHCT86AMG datasheet, pinout, applications, or equivalent options, key selection criteria include its LSTTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), power-down protection on all I/O, balanced tPLH/tPHL delays, and SOIC-14 Pb-free packaging compliant with RoHS and industrial temperature range (−55°C to +85°C).

Technical Context

The MC74VHCT86AMG implements four independent XOR gates using silicon-gate CMOS technology, achieving bipolar-Schottky TTL speed while retaining CMOS low static power. Its three-stage internal architecture includes an output buffer that enhances noise immunity and stabilizes switching behavior under capacitive loads.

Input structures tolerate up to 7 V regardless of VCC, enabling safe 5 V ↔ 3 V bidirectional level shifting without external components. Output stages remain protected when VCC = 0 V, supporting hot-insertion and battery-backup scenarios where supply sequencing is uncontrolled.

Key Specifications

Pinout & Package

MC74VHCT86AMG is supplied in a 14-lead SOIC package (Case 751A, D suffix), with lead finish Pb-free and RoHS compliant. Pin numbering follows standard SOIC top-view convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar XOR gate and level-shifting applications.

Compared with SN74LVC86APW and 74AHCT86D,118, the MC74VHCT86AMG uniquely combines 7 V input tolerance, −55°C operation, and 4.8 ns speed at 5 V - making it optimal for ruggedized mixed-voltage control systems where reliability under voltage mismatch is non-negotiable.

Availability

MC74VHCT86AMG is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and mixed-voltage interfaces.

Supply support for MC74VHCT86AMG 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 manufacturer specializing in energy-efficient, high-reliability silicon solutions for automotive, industrial, cloud, and medical applications.

The MC74VHCT86AMG belongs to the VHCT logic family - engineered for seamless integration between legacy TTL and modern low-voltage CMOS systems, with emphasis on robustness in harsh electrical environments.

FAQ

What is the maximum input voltage rating for MC74VHCT86AMG, and does it depend on VCC?

The MC74VHCT86AMG supports DC input voltages from −0.5 V to +7.0 V, independent of the VCC supply voltage. This means inputs remain protected even when VCC = 0 V or VCC = 2.0 V, enabling safe interfacing with 5 V signals in 3.3 V or 2.5 V systems without external clamping. This specification is verified per the Absolute Maximum Ratings table in the official onsemi datasheet Rev. 3.

Can MC74VHCT86AMG be used as a level shifter between 1.8 V and 3.3 V logic domains?

Yes, the MC74VHCT86AMG can translate from 1.8 V CMOS logic to 3.3 V CMOS logic when operated at VCC = 3.3 V. Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) ensure reliable detection of 1.8 V logic highs, while its full-rail CMOS output swing delivers clean 0–3.3 V signals. This capability is explicitly stated in the device's functional description and confirmed by input voltage tolerance testing.

Does MC74VHCT86AMG have power-down protection on both inputs and outputs?

Yes, MC74VHCT86AMG includes power-down protection on all inputs and outputs. When VCC = 0 V, the input protection circuitry prevents back-powering or latch-up, and the output structure remains isolated and non-damaging. This feature is essential for hot-plug applications and systems with uncontrolled power sequencing, and it is documented in the "Input and Output Protection" section of the onsemi datasheet.

What is the typical propagation delay of MC74VHCT86AMG at 3.3 V supply?

At VCC = 3.3 V ± 0.3 V and CL = 50 pF, the MC74VHCT86AMG exhibits a typical propagation delay (tPLH/tPHL) of 9.5 ns, with a maximum of 14.5 ns over temperature. This value is measured per AC Electrical Characteristics in the datasheet and reflects real-world performance in 3.3 V digital control paths, including those driving moderate capacitive loads.

Is MC74VHCT86AMG pin-compatible with standard 74-series XOR gates like 74HC86 or 74LS86?

Yes, MC74VHCT86AMG is pin- and function-compatible with industry-standard 14-pin SOIC XOR gates including 74HC86 and 74LS86. Its pinout matches the conventional assignment: inputs A1–A4 and B1–B4 on pins 1/2, 4/5, 9/10, 12/13; outputs Y1–Y4 on pins 3, 6, 8, 11; VCC on pin 14; GND on pin 7. This compatibility is confirmed in the "Pin Connection and Marking Diagram" and "Ordering Information" sections of the datasheet.