onsemi 74VHC86MX

Overview

74VHC86MX from onsemi is a quad 2-input exclusive-OR gate in TSSOP-14 WB package, operating at 2.0–5.5 V supply, with 4.8 ns typical propagation delay at 5 V, ±8 mA output drive, and input tolerance up to 5.5 V independent of VCC. It serves as a logic-level combinatorial gate in digital signal routing, bus arbitration, and parity generation circuits.

For engineers reviewing the 74VHC86MX datasheet, pinout, applications, or equivalent options, key selection considerations include its 5.5 V-tolerant inputs for mixed-voltage interfacing, low 2 µA max ICC at 25 °C, 0.1 V VOL at 4 mA load, noise immunity ≥28% VCC, and compatibility with 74HC86 function and pinout.

Technical Context

The 74VHC86MX implements four independent XOR gates using silicon-gate CMOS technology, delivering TTL-compatible speed without bipolar power penalties. Each gate features symmetrical input structure, rail-to-rail output swing, and input clamp diodes enabling safe operation across 0–5.5 V input range regardless of VCC setting.

It supports dual-supply system interfacing (e.g., 5 V logic to 3 V microcontroller), battery-backup contexts, and hot-swap tolerant I/O due to its overvoltage-tolerant inputs and power-down protection on all pins. No external pull-ups are required, and unused inputs must be tied HIGH or LOW per design specification.

Key Specifications

Pinout & Package

TSSOP-14 WB (Case 948G), 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, Pb-free, halogen-free, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC86M and SN74LVC2G86DCUR, the 74VHC86MX uniquely balances high speed, wide supply range, and 5.5 V-tolerant inputs-making it optimal for interoperable industrial control backplanes and legacy-system upgrades requiring both performance and voltage flexibility.

Availability

74VHC86MX is available at Aetrix Electronics and suitable for industrial automation interfaces, automotive body control modules, and medical device data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74VHC86MX 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 sensor solutions for automotive, industrial, and cloud infrastructure markets.

The 74VHC86MX belongs to the VHC (Very High Speed CMOS) logic family, engineered to deliver TTL-equivalent speed with CMOS power efficiency-targeting high-reliability digital control, instrumentation, and mixed-voltage system integration.

FAQ

What is the maximum input voltage allowed on 74VHC86MX pins when VCC = 3.3 V?

The 74VHC86MX allows DC input voltages from −0.5 V to +6.5 V on all inputs regardless of VCC level. When VCC = 3.3 V, inputs may safely accept 5 V logic signals without damage or level translation-enabling direct interfacing with legacy 5 V peripherals. This overvoltage tolerance is implemented via internal clamp diodes and verified per the Absolute Maximum Ratings table in the official onsemi datasheet.

Is 74VHC86MX pin-compatible with 74HC86 devices?

Yes, the 74VHC86MX is pin- and function-compatible with standard 74HC86 devices in the same TSSOP-14 WB package. Its pin assignment matches the industry-standard 14-pin XOR gate layout: inputs A0–A3/B0–B3 and outputs O0–O3 occupy identical positions, and GND (pin 7) and VCC (pin 14) align exactly. This allows drop-in replacement in existing 74HC86 designs to improve speed and noise immunity without PCB modification.

What is the recommended operating temperature range for 74VHC86MX?

The 74VHC86MX is specified for continuous operation from −40 °C to +85 °C ambient temperature. This industrial-grade range supports deployment in harsh environments such as factory floor controllers, outdoor telemetry units, and under-hood automotive modules. Thermal resistance (θJA) is 150 °C/W on a standard FR4 board, and junction temperature must remain below +150 °C under bias per datasheet limits.

Does 74VHC86MX require external pull-up or pull-down resistors on unused inputs?

No, external resistors are not required-but unused inputs must be actively tied HIGH or LOW to prevent floating states that cause increased ICC and potential oscillation. The 74VHC86MX does not include internal weak pull-ups or pull-downs; leaving inputs unconnected violates the Recommended Operating Conditions (Note 3), which explicitly states "Unused inputs must be held HIGH or LOW. They may not float."

What is the output drive capability of 74VHC86MX at 3.3 V supply?

At VCC = 3.3 V, the 74VHC86MX delivers ±4 mA output current (per AC Electrical Characteristics table, CL = 15 pF). This is sufficient to drive two 74HC-series inputs or one 74LS input directly. For higher loads, derating applies: VOL remains ≤0.44 V at 4 mA sink, ensuring reliable LOW-level recognition across compatible logic families under worst-case process/voltage/temperature corners.