onsemi MC74AC86N

Overview

MC74AC86N from onsemi is a quad 2-input exclusive-OR gate in high-performance silicon-gate CMOS technology, operating across 2.0 V to 6.0 V supply range, delivering ±24 mA output drive, with propagation delays as low as 1.5 ns at 5.0 V and 50 pF load, used in digital logic arbitration, parity generation, and data path control in industrial control systems.

For engineers reviewing the MC74AC86N datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, SOIC-14 package mapping, confirmed DC/AC electrical parameters, real-world use cases, and two validated alternative parts for logic-level XOR function replacement.

Technical Context

The MC74AC86N implements four independent XOR gates using CMOS transistor pairs with rail-to-rail input thresholds and complementary push-pull outputs. Each gate accepts TTL- and CMOS-compatible inputs and drives standard CMOS loads with guaranteed VOH ≥ 4.4 V and VOL ≤ 0.44 V at 24 mA sink/source under 5.5 V supply.

It operates over −40°C to +85°C ambient temperature, supports dynamic output current up to ±75 mA (pulse), and features ESD protection >2000 V HBM. Its input capacitance is 4.5 pF and power dissipation capacitance is 35 pF at 5.0 V, enabling stable high-speed operation in noise-sensitive environments.

Key Specifications

Pinout & Package

MC74AC86N is supplied in a 14-lead SOIC package (Case 751A), 8.75 mm × 3.90 mm footprint, 1.75 mm height, with 1.27 mm pitch and Pb-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC74AC86N, SN74AC86N offers identical functionality with automotive qualification and marginally faster switching, while 74VHC86N trades speed and drive strength for extended voltage range and lower quiescent current - making MC74AC86N optimal for industrial 5 V systems demanding balanced performance and reliability.

Availability

MC74AC86N is available at Aetrix Electronics and suitable for industrial control panels, embedded communication modules, and test equipment requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for MC74AC86N 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, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC74AC86N belongs to onsemi's 74AC logic family, designed for high-speed, low-power digital signal routing and combinatorial logic in industrial automation and communications hardware where timing precision and supply flexibility are critical.

FAQ

What logic family does MC74AC86N belong to, and how does it differ from 74ACT variants?

The MC74AC86N belongs to the 74AC (Advanced CMOS) logic family, characterized by 2.0–6.0 V operation, ±24 mA drive, and TTL-compatible input thresholds. Unlike the 74ACT variant (e.g., MC74ACT86), which is strictly 4.5–5.5 V and optimized for 5 V-only systems with tighter VIH/VIL specs, MC74AC86N supports broader supply voltages and exhibits higher noise immunity at 3.3 V operation. Both share identical pinout and XOR functionality, but MC74AC86N is preferred for mixed-voltage designs.

Is MC74AC86N pin-compatible with other 14-pin quad XOR ICs like SN74LS86N?

No, MC74AC86N is not pin-compatible with SN74LS86N. While both are 14-pin quad XOR gates, SN74LS86N follows the older TTL pinout (e.g., VCC on pin 14, GND on pin 7), whereas MC74AC86N uses the industry-standard CMOS layout (VCC on pin 14, GND on pin 7) - same physical pin locations. However, electrical incompatibility arises: SN74LS86N draws significantly higher ICC, cannot drive ±24 mA, and lacks rail-to-rail output swing. Direct substitution requires validation of fanout, timing, and supply conditions.

What is the maximum capacitive load MC74AC86N can drive while maintaining specified propagation delay?

The MC74AC86N is characterized for CL = 50 pF in its AC specifications, with tPLH/tPHL guaranteed ≤ 9.0 ns at 5.0 V. Driving loads beyond 50 pF increases propagation delay nonlinearly - e.g., at 100 pF, delay may exceed 15 ns. For reliable timing closure, keep total net capacitance (including PCB trace, input pins of downstream devices, and probe loading) ≤ 50 pF. If higher load is unavoidable, add a buffer stage or reduce trace length and stubs.

Does MC74AC86N support hot-swap or live-insertion in backplane applications?

No, MC74AC86N is not designed for hot-swap operation. It lacks powered-off protection, bus-hold, or Ioff (power-off isolation) features. Applying VCC before or after signal inputs may cause latch-up or excessive current due to input diode conduction. For backplane applications requiring live insertion, use hot-swap–qualified logic buffers (e.g., onsemi's NCV series) or add external series resistors and clamping diodes per I/O line.

Can MC74AC86N operate reliably at 3.3 V with 5 V-tolerant inputs?

Yes, MC74AC86N operates reliably at 3.3 V supply and accepts 5 V inputs without damage. Its absolute maximum input voltage is VCC + 0.5 V, and with VCC = 3.3 V, VI can safely reach 3.8 V - exceeding standard 3.3 V logic high (2.4 V). However, 5 V inputs exceed this limit and require external clamping (e.g., resistor + Zener) or level-shifting. The device's VIH = 2.1 V at 3.0 V VCC ensures compatibility with 3.3 V CMOS outputs.