onsemi MC74VHCT86ADR2

Overview

MC74VHCT86ADR2 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, and supports hot insertion and supply-voltage mismatch tolerance up to 7 V on inputs.

For engineers reviewing the MC74VHCT86ADR2 datasheet, pinout, applications, or equivalent options, key selection criteria include its LSTTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), ±25 mA output drive, power-down protection, balanced propagation delays, and SOIC-14 Pb-free packaging.

Technical Context

The MC74VHCT86ADR2 implements four independent XOR gates in a single silicon-gate CMOS die, with three-stage internal buffering for high noise immunity and stable output transitions. Its input structure tolerates up to 7 V regardless of VCC, enabling safe interfacing between 3 V and 5 V systems without external level-shifting circuitry.

Each gate features symmetrical tPLH/tPHL propagation delays, low dynamic noise (VOLP ≤ 0.8 V), and latchup immunity exceeding 300 mA. The device maintains CMOS power efficiency while matching bipolar Schottky TTL speed-achieving 4.8 ns typical tPD at VCC = 5 V with CL = 50 pF.

Key Specifications

Pinout & Package

MC74VHCT86ADR2 is housed in a 14-lead SOIC package (Case 751A, D suffix), with standard dual-in-line pin spacing and surface-mount footprint. Pin numbering follows JEDEC MS-012, with pin 1 marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC86APWR and 74AHCT86D,118, the MC74VHCT86ADR2 uniquely combines 7 V input overvoltage tolerance, 2.0–5.5 V operation, and sub-5 ns propagation delay - making it optimal for robust, multi-rail industrial interfaces where supply sequencing and hot-swap resilience are mandatory.

Availability

MC74VHCT86ADR2 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MC74VHCT86ADR2 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 MC74VHCT86ADR2 belongs to the VHCT (Very High-Speed CMOS TTL-Compatible) logic family, engineered specifically for seamless interoperability between legacy TTL systems and modern low-voltage CMOS architectures while maintaining high noise immunity and robustness.

FAQ

What is the maximum input voltage rating for MC74VHCT86ADR2?

The MC74VHCT86ADR2 supports DC input voltages up to 7.0 V regardless of VCC level, as specified in the Absolute Maximum Ratings table. This overvoltage tolerance allows safe interfacing of 5 V signals into 3 V or 1.8 V systems without external protection components. The device's input protection circuitry prevents damage during supply-voltage mismatches, hot insertion, or battery backup conditions - a key reliability feature confirmed in the datasheet's "Input Protection" section.

Can MC74VHCT86ADR2 operate at 3.3 V supply voltage?

Yes, MC74VHCT86ADR2 is fully specified to operate from 2.0 V to 5.5 V, including 3.3 V nominal supply. At VCC = 3.3 V ± 0.3 V, its typical propagation delay is 7.0 ns (CL = 15 pF) and 9.5 ns (CL = 50 pF), with guaranteed VIH = 1.2 V and VIL = 0.53 V. These parameters ensure reliable operation with both 3.3 V CMOS and LSTTL-compatible drivers, making MC74VHCT86ADR2 suitable for mixed-voltage logic translation in modern embedded systems.

Is MC74VHCT86ADR2 pin-compatible with standard 74-series XOR gates?

Yes, MC74VHCT86ADR2 uses the industry-standard SOIC-14 pinout defined for quad 2-input XOR gates, matching pin-for-pin the 74HC86, 74HCT86, and 74LS86 families. Pin 1 is A1, pin 2 is B1, pin 3 is Y1, continuing through pin 13 (B4) and pin 14 (VCC), with GND at pin 7. This compatibility enables drop-in replacement in existing designs without PCB modification - verified by the "Pin Connection and Marking Diagram" and "Pin and Function Compatible" feature statement in the datasheet.

Does MC74VHCT86ADR2 support power-down protection when VCC = 0 V?

Yes, MC74VHCT86ADR2 provides active power-down protection on both inputs and outputs when VCC = 0 V. The datasheet explicitly states that "the output structures also provide protection when VCC = 0 V" and that this feature helps prevent device destruction caused by supply–input/output voltage mismatch. This allows safe connection of powered signal sources to unpowered MC74VHCT86ADR2 devices - critical for modular systems, hot-swap cards, and battery-backed subsystems where supply sequencing is uncontrolled.

What is the output drive strength of MC74VHCT86ADR2 at 5 V supply?

At VCC = 5.0 V, MC74VHCT86ADR2 guarantees ±8 mA output drive per gate under worst-case conditions (TA ≤ 125°C), with typical performance of ±25 mA. The datasheet specifies VOL ≤ 0.52 V at IOL = 8 mA and VOH ≥ 2.34 V at IOH = −8 mA. This drive strength supports direct interfacing to multiple standard CMOS inputs (fan-out ≥ 10), small LED indicators, and moderate-capacitance bus lines - confirmed in the "DC Electrical Characteristics" table under VOH/VOL test conditions.