onsemi MC74ACT86ML1

Overview

MC74ACT86ML1 from onsemi is a quad 2-input exclusive-OR gate in high-performance silicon-gate CMOS technology, operating at 4.5 V to 5.5 V supply, delivering ±24 mA output drive, with propagation delays as low as 1.5 ns (typ) at 5 V and 50 pF load, used in digital logic arbitration, parity generation, and data path control in industrial control systems.

For engineers reviewing the MC74ACT86ML1 datasheet, pinout, applications, or equivalent options, key selection criteria include TTL-compatible input thresholds, rail-to-rail output swing under 24 mA load, guaranteed AC performance across −40°C to +85°C, and Pb-free TSSOP-14 packaging for space-constrained PCB layouts.

Technical Context

The MC74ACT86ML1 implements four independent XOR gates using ACT-series CMOS logic, featuring TTL-compatible input voltage thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) and fast edge-sensitive switching with tPLH/tPHL ≤ 10.0/10.5 ns (max) over full temperature range. It supports single-supply operation with no level-shifting required between legacy TTL and modern CMOS subsystems.

Its design targets deterministic combinational logic where phase-insensitive bit comparison, error detection, or controlled signal inversion is required - not intended for clock distribution or analog signal processing. All outputs are fully buffered and specified for simultaneous switching without degradation in timing or noise margin.

Key Specifications

Pinout & Package

TSSOP-14 package (Case 948G), 5.0 mm × 4.4 mm body, 0.65 mm pitch, 1.20 mm max height, Pb-free, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ACT86DR and 74VHC86M, the MC74ACT86ML1 offers optimal balance of TTL compatibility, speed, and compact packaging - making it preferred for new industrial designs requiring 5 V logic density and reliability without layout redesign.

Availability

MC74ACT86ML1 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded control systems requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.

Supply support for MC74ACT86ML1 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 electronics, serving automotive, industrial, cloud, medical, and IoT markets with differentiated silicon solutions.

The MC74ACT86ML1 belongs to the 74ACT logic family - designed specifically for high-speed, TTL-compatible 5 V digital systems where noise immunity, consistent timing, and interoperability with legacy components are essential.

FAQ

What logic family does MC74ACT86ML1 belong to, and why does it matter for system integration?

The MC74ACT86ML1 belongs to the 74ACT logic family, which provides TTL-compatible input thresholds and CMOS output drive characteristics at 5 V supply. This matters because it allows seamless interfacing with older 74LS or 74F devices without level shifters, while delivering faster switching and lower power than pure bipolar logic - a key advantage in mixed-generation digital systems where MC74ACT86ML1 serves as a bridge component.

Can MC74ACT86ML1 operate reliably at 3.3 V supply?

No, MC74ACT86ML1 is not rated for 3.3 V operation. Its recommended supply range is strictly 4.5 V to 5.5 V, and its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) are optimized for 5 V signaling. Attempting to use MC74ACT86ML1 at 3.3 V may result in undefined logic states, increased propagation delay, or failure to recognize valid high inputs - always verify supply compliance before integrating MC74ACT86ML1 into low-voltage designs.

What is the maximum capacitive load MC74ACT86ML1 can drive while maintaining specified timing?

The MC74ACT86ML1 is characterized for CL = 50 pF in its AC specifications, with propagation delays guaranteed up to that load. While it can physically drive higher capacitance, timing parameters (tPLH/tPHL) degrade beyond 50 pF - for example, at 100 pF, delay increases by ~30% versus datasheet values. For reliable timing-critical use, keep total net capacitance ≤50 pF or re-characterize the path when using MC74ACT86ML1 in heavier-loaded configurations.

Does MC74ACT86ML1 support hot-swap or live-insertion in backplane applications?

No, MC74ACT86ML1 does not support hot-swap operation. It lacks power-up sequencing control, bus-hold circuitry, or Ioff protection. Applying VCC before GND, or inserting the device into a powered backplane, risks latch-up or permanent damage due to uncontrolled current paths. Always power-cycle the system before replacing MC74ACT86ML1 - this requirement applies regardless of whether the host system uses SOIC or TSSOP variants of MC74ACT86ML1.

How does the dynamic output current rating (±75 mA) of MC74ACT86ML1 differ from its DC output rating (±24 mA)?

The ±75 mA dynamic output rating (IOLD/IOHD) for MC74ACT86ML1 applies to short-duration pulses (≤2.0 ms), enabling transient loads like reset pulse shaping or strobe assertion. In contrast, the ±24 mA DC rating defines continuous sink/source capability under steady-state conditions. Exceeding ±24 mA continuously risks thermal overstress; the higher dynamic rating allows MC74ACT86ML1 to handle brief surges without external drivers - useful in edge-triggered control paths.