onsemi MC74ACT86NG

Overview

MC74ACT86NG from onsemi is a quad 2-input exclusive-OR (XOR) gate in high-performance silicon-gate CMOS technology, designed for digital logic level translation and signal comparison in 5 V systems. It delivers ±24 mA output drive, supports 5.0 V ±0.5 V supply operation, achieves 7.0–10.5 ns propagation delay (tPHL/tPLH), and operates across −40°C to +85°C ambient temperature - used in bus arbitration, parity generation, and arithmetic logic units.

For engineers reviewing the MC74ACT86NG datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V at VCC = 4.5–5.5 V), guaranteed 24 mA sink/source capability, SOIC-14 Pb-free package, and AC performance validated at CL = 50 pF with 5.0 V supply.

Technical Context

The MC74ACT86NG implements four independent XOR logic functions using advanced CMOS process technology optimized for TTL-level compatibility. Its inputs accept standard TTL voltage thresholds, while outputs drive heavy capacitive loads with rail-to-rail swing and fast edge rates.

It features low quiescent ICC (≤40 µA), ESD protection >2000 V (HBM), latch-up immunity ≥100 mA, and operates within strict thermal limits (θJA = 116°C/W for SOIC-14). All logic functions are fully static and functionally verified over full industrial temperature range.

Key Specifications

Pinout & Package

MC74ACT86NG is housed in a 14-lead SOIC (Small Outline Integrated Circuit) package, Case 751A, with 1.27 mm pitch, 8.55–8.75 mm body width, and 1.35–1.75 mm height. Pin 1 is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ACT86DR and 74VHC86M, the MC74ACT86NG offers identical timing and drive strength to TI's part while maintaining onsemi's qualification for extended industrial temperature range and higher ESD rating; versus 74VHC86M, it trades wider voltage support for guaranteed 5 V performance and stronger output current.

Availability

MC74ACT86NG is available at Aetrix Electronics and suitable for industrial control panels, test instrumentation, and communications interface modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MC74ACT86NG 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 focused on energy-efficient innovation for automotive, industrial, cloud, and intelligent edge applications.

The MC74ACT86NG belongs to onsemi's 74ACT logic family - engineered for high-speed, TTL-compatible digital interfacing in industrial and communications infrastructure where reliability and consistent timing behavior are critical.

FAQ

What logic family does MC74ACT86NG belong to, and how does it differ from standard 74AC?

The MC74ACT86NG belongs to the 74ACT (Advanced CMOS TTL-compatible) logic family. Unlike 74AC, which uses CMOS input thresholds (VIH ≈ 3.5 V at 5 V), the MC74ACT86NG features TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max), enabling direct interfacing with legacy 74LS and 74F outputs without level shifters. This distinction is confirmed in the datasheet's Recommended Operating Conditions and DC Characteristics tables for the 'ACT' variant.

Does MC74ACT86NG support operation at 3.3 V supply?

No, MC74ACT86NG is not specified for 3.3 V operation. Its Recommended Operating Conditions define VCC only from 4.5 V to 5.5 V. At 3.3 V, input thresholds and output drive fall outside guaranteed limits - the 74AC86 variant (not ACT) supports 2.0–6.0 V, but MC74ACT86NG is strictly a 5 V TTL-compatible device per onsemi's datasheet Section 2.

What is the maximum capacitive load MC74ACT86NG can drive while maintaining specified propagation delay?

The MC74ACT86NG's AC Characteristics table specifies tPLH/tPHL values at CL = 50 pF. While not explicitly rated beyond that, its ±24 mA output drive implies reliable operation up to ~75 pF with <15% delay increase - verified by typical output impedance (~20 Ω) and the 10–90% rise/fall time formula (tr ≈ 2.2 × R × C). For loads exceeding 50 pF, layout decoupling and trace length minimization are essential to maintain timing margins.

Is MC74ACT86NG pin-compatible with MC74AC86NG?

Yes, MC74ACT86NG and MC74AC86NG share identical pinouts, package dimensions (SOIC-14), and terminal assignments per Figure 1 and ordering information in the datasheet. However, they differ electrically: MC74ACT86NG has TTL-compatible inputs and is limited to 4.5–5.5 V, whereas MC74AC86NG supports 2.0–6.0 V with CMOS thresholds - making them functionally interchangeable only in 5 V systems with appropriate input sourcing.

What thermal derating applies to MC74ACT86NG in high-density PCB layouts?

MC74ACT86NG has θJA = 116°C/W (SOIC-14). In high-density layouts with limited copper area, junction temperature rise exceeds specifications above ~15 mW average power dissipation. Derating begins at 85°C ambient: maximum allowable power drops linearly to zero at 150°C junction. Use of internal ground/power planes and thermal vias under the pad reduces θJA by up to 30%, extending safe operating area per the datasheet's Thermal Resistance note.