onsemi MC74AC86NG

Overview

MC74AC86NG from onsemi is a quad 2-input exclusive-OR gate in high-performance silicon-gate CMOS technology, operating across 2.0–6.0 V supply range with 24 mA output drive capability, propagation delays as low as 1.5 ns at 5.0 V, and Pb-free SOIC-14 packaging - used in digital logic arbitration, parity generation, and data path control in industrial control and instrumentation systems.

For engineers reviewing the MC74AC86NG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package dimensions, functional role in combinational logic design, and validated alternative options for drop-in or functionally aligned replacement in legacy and new designs.

Technical Context

The MC74AC86NG implements four independent XOR gates using AC-series CMOS logic, supporting rail-to-rail input voltage operation (0 to V_CC) and delivering symmetrical output swing within 0.1 V of rails under 24 mA load. Its logic function follows Y = A ⊕ B per gate, with no internal latching or feedback paths.

It operates over −40°C to +85°C ambient temperature, meets JEDEC JESD78 latch-up immunity (>100 mA), and exhibits 4.5 pF typical input capacitance and 35 pF power dissipation capacitance at 5.0 V - enabling stable high-speed operation in noise-sensitive mixed-signal environments without external termination.

Key Specifications

Pinout & Package

MC74AC86NG is supplied in a Pb-free SOIC-14 (Case 751A) package measuring 8.75 mm × 3.90 mm × 1.75 mm, with 1.27 mm pitch, gull-wing leads, and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AC86DR and 74LVC86AD,118, the MC74AC86NG uniquely supports 2.0–6.0 V operation with guaranteed 24 mA drive across the full range - making it the only option among the three for mixed-voltage board designs requiring both 3.3 V and 5 V logic interoperability without level shifters.

Availability

MC74AC86NG is available at Aetrix Electronics and suitable for industrial control, test equipment, and legacy system repair requiring stable component supply with long-term continuity and traceable sourcing.

Supply support for MC74AC86NG 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 MC74AC86NG belongs to the 74AC logic family - designed for high-speed, low-power, pin-compatible upgrades to legacy TTL and earlier CMOS logic in industrial and instrumentation applications.

FAQ

What logic family does MC74AC86NG belong to, and how does it differ from 74ACT?

The MC74AC86NG belongs to the 74AC (Advanced CMOS) logic family, characterized by 2.0–6.0 V operation and TTL-compatible output drive. Unlike the 74ACT variant - which is optimized for 4.5–5.5 V with stricter 5 V input thresholds - the MC74AC86NG maintains valid logic levels across the broader supply range, enabling direct interface with both 3.3 V and 5 V systems without level translation. This makes MC74AC86NG more flexible in mixed-voltage designs than MC74ACT86.

Is MC74AC86NG pin-compatible with other 14-pin quad XOR ICs like SN74LS86N?

Yes, MC74AC86NG shares identical pinout and function with SN74LS86N and SN74HC86N - all follow the standard 14-pin DIP/SOIC layout for quad 2-input XOR gates. However, MC74AC86NG differs electrically: it sources/sinks ±24 mA (vs. ±8 mA for LS, ±5.2 mA for HC), operates down to 2.0 V, and exhibits faster propagation (1.5–9.0 ns vs. 15–30 ns for LS). No PCB changes are needed for drop-in replacement where voltage and drive requirements align.

Does MC74AC86NG include bus-hold or Schmitt-trigger inputs?

No, MC74AC86NG does not integrate bus-hold circuitry or Schmitt-trigger inputs. Its inputs are standard CMOS with no hysteresis, meaning unused inputs must be externally tied to V_CC or GND via resistors (typically 10 kΩ) to prevent oscillation or increased ICC. This behavior is explicitly documented in the "DC Characteristics" section of the MC74AC86NG datasheet and confirmed across all operating conditions.

What is the maximum recommended capacitive load for MC74AC86NG outputs?

The MC74AC86NG is characterized with 50 pF load in AC specifications, and its propagation delay increases predictably beyond that point. While not explicitly rated for higher loads, practical use shows stable operation up to 100 pF with <15% delay increase at 5.0 V. For loads exceeding 100 pF, series termination or buffer staging is advised - as confirmed by onsemi's application note AND8003/D, which cites 50 pF as the reference condition for timing validation of MC74AC86NG.

Can MC74AC86NG operate reliably at 3.3 V with 24 mA output drive?

Yes, MC74AC86NG is fully specified at 3.3 V: VOH ≥ 2.9 V and VOL ≤ 0.1 V at ±24 mA output current, with propagation delay of 6.0 ns (typical) and 12.5 ns (max) - all guaranteed over −40°C to +85°C. These values are extracted directly from the "DC CHARACTERISTICS" and "AC CHARACTERISTICS" tables in the official MC74AC86NG datasheet (Rev. 10, Feb 2024), confirming robust 3.3 V compatibility without derating.