onsemi MC74ACT86DG

Overview

MC74ACT86DG from onsemi is a quad 2-input exclusive-OR gate in SOIC-14 package, designed for high-speed digital logic applications requiring TTL-compatible inputs and CMOS outputs. It operates at 4.5 V to 5.5 V supply, delivers ±24 mA output drive, exhibits 7.0–10.5 ns propagation delay (tPHL/tPLH), and supports industrial temperature range (−40°C to +85°C). It is used in arithmetic logic units, parity generators, and data comparators.

For engineers reviewing the MC74ACT86DG datasheet, pinout, applications, or equivalent options, key selection considerations include its ACT-series TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V), guaranteed 24 mA sink/source capability, low 0.36 V VOL at 24 mA, and Pb-free SOIC-14 packaging compliant with JEDEC standards.

Technical Context

The MC74ACT86DG implements four independent XOR logic functions using high-performance silicon-gate CMOS technology. Its input structure accepts TTL-level signals (VIH ≥ 2.0 V, VIL ≤ 0.8 V at 4.5 V), while output stages provide rail-to-rail swing and 24 mA drive strength in both sourcing and sinking directions.

It features ESD protection exceeding 2000 V (HBM) and latch-up immunity of 100 mA per I/O at 85°C. AC performance is characterized at CL = 50 pF, with typical propagation delays of 7.0 ns (tPHL) and 8.5 ns (tPLH) at VCC = 5.0 V and TA = +25°C.

Key Specifications

Pinout & Package

MC74ACT86DG is housed in a 14-lead SOIC package (Case 751A), 8.55–8.75 mm × 3.80–4.00 mm body size, 1.27 mm pitch, with GND on Pin 7 and VCC on Pin 14.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ACT86DR, MC74ACT86DG offers marginally higher thermal resistance but identical functional behavior; versus 74VHC86M, MC74ACT86DG provides superior drive strength, faster timing, and true TTL input compatibility-critical for mixed-logic-system integration.

Availability

MC74ACT86DG is available at Aetrix Electronics and suitable for industrial control systems, test instrumentation, and legacy digital logic upgrades requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.

Supply support for MC74ACT86DG 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 MC74ACT86DG belongs to onsemi's 74ACT logic family, engineered for high-speed, TTL-compatible digital interfacing in industrial and communications equipment where reliability and signal integrity are essential.

FAQ

What logic family does MC74ACT86DG belong to, and how does it differ from MC74AC86DG?

The MC74ACT86DG belongs to the 74ACT (Advanced CMOS TTL-compatible) logic family. Unlike the 74AC variant, it features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at 4.5 V), enabling direct interface with legacy TTL outputs without level shifters. The MC74AC86DG uses CMOS-compatible inputs (VIH = 3.15 V min at 4.5 V), making MC74ACT86DG the preferred choice in mixed-logic systems. Both share the same pinout and output drive capability.

Does MC74ACT86DG support operation at 3.3 V supply?

No, MC74ACT86DG is not rated for 3.3 V operation. Its recommended VCC range is strictly 4.5 V to 5.5 V, as confirmed in the Recommended Operating Conditions table. At 3.3 V, input thresholds become undefined and output drive degrades significantly. For 3.3 V systems, consider the 74LVC86 or 74AUP86 families instead. MC74ACT86DG must be powered from a regulated 5 V rail.

What is the maximum capacitive load MC74ACT86DG can drive while maintaining specified propagation delay?

MC74ACT86DG is characterized for CL = 50 pF, with tPHL/tPLH guaranteed up to 10.5 ns under those conditions. Driving loads beyond 50 pF increases delay nonlinearly and may cause waveform rounding or timing violations. For loads >50 pF, buffer stages or reduced fan-out are recommended. The device's output impedance and ±24 mA drive support stable edge rates into typical PCB traces (≤30 pF) and small capacitive loads without external termination.

Is MC74ACT86DG pin-compatible with other quad XOR ICs like the 74LS86 or CD4070?

MC74ACT86DG shares the same 14-pin SOIC footprint and pin assignment (including GND on Pin 7 and VCC on Pin 14) as 74LS86 and CD4070, but electrical compatibility differs. While pinout matches, 74LS86 has open-collector outputs and lower drive (8 mA), and CD4070 uses CMOS inputs with wider VCC range (3–15 V) but slower speed. MC74ACT86DG is a direct physical replacement but requires verification of input voltage levels and load requirements in the target circuit.

What is the significance of the "G" suffix in MC74ACT86DG?

The "G" suffix in MC74ACT86DG denotes a Pb-free, RoHS-compliant package per JEDEC J-STD-020D. It confirms the SOIC-14 body uses lead-free solderable terminations and complies with onsemi's green packaging initiative. This marking also appears in the device's top-side laser marking (e.g., "ACT86G") and is verified in the Ordering Information table on page 5 of the datasheet. MC74ACT86DG is fully compatible with standard lead-free reflow profiles.