STMicroelectronics 74ACT86MTR

Overview

74ACT86MTR from STMicroelectronics is a quad 2-input exclusive-OR gate in SO-14 package, operating at 4.5–5.5 V with 5.0 ns typical propagation delay, 24 mA symmetrical output drive, and TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). It interfaces high-speed CMOS systems with TTL/NMOS logic in digital signal routing and parity generation.

For engineers reviewing the 74ACT86MTR datasheet, 74ACT86MTR pinout, 74ACT86MTR application, or 74ACT86MTR equivalent, key selection criteria include transmission-line driving capability (50 Ω), latch-up immunity, ESD tolerance (2 kV), and pin/function compatibility with standard 74-series 86 logic.

Technical Context

The 74ACT86 implements four independent XOR gates using sub-micron C2MOS technology with three-stage buffered outputs, enabling stable switching and high noise immunity. Each gate features symmetrical output impedance (|IOH| = IOL ≥ 24 mA) and balanced propagation delays (tPLH ≅ tPHL).

It supports direct interfacing across logic families via TTL-compatible input voltage thresholds and operates over industrial temperature range (−55°C to +125°C) with quiescent ICC ≤ 2 µA at 25°C.

Key Specifications

Pinout & Package

74ACT86MTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012, with 1.27 mm pitch, 8.55–8.75 mm body width, and 5.8–6.2 mm body length. 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 quad XOR gate applications.

Compared with SN74ACT86DR and 74VHC86M, the 74ACT86MTR delivers superior ESD robustness, extended temperature support, and verified 50 Ω line driving-making it optimal for industrial communications and timing-critical parity circuits.

Availability

74ACT86MTR is available at Aetrix Electronics and suitable for parity generation, digital comparison, phase detection, and controlled inversion applications requiring stable component supply across automotive, industrial control, and communications equipment lifecycles.

Supply support for 74ACT86MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74ACT family targets high-speed, low-power TTL-compatible logic interfaces, emphasizing robustness, noise immunity, and seamless integration across legacy and modern logic families.

FAQ

Is 74ACT86MTR pin-compatible with standard 74LS86?

Yes - 74ACT86MTR uses identical pinout and logic function as 74LS86, including inputs on pins 1/2/4/5/9/10/12/13 and outputs on pins 3/6/8/11. However, it requires 4.5–5.5 V supply and offers faster speed, lower power, and higher drive strength than LS variants.

Can 74ACT86MTR operate at 3.3 V?

No - the device is specified only for 4.5–5.5 V operation. At 3.3 V, VIH/VIL thresholds are not met, and output drive falls outside specification. For 3.3 V systems, consider 74LVC86 or 74AUP1G86 single-gate alternatives.

What is the maximum recommended capacitive load for 74ACT86MTR?

The AC specifications are characterized at CL = 50 pF. While the device can drive heavier loads, propagation delay increases linearly with capacitance; for reliable 5 ns timing, total node capacitance (including PCB trace and fanout) should remain ≤50 pF.

Does 74ACT86MTR require external pull-up or pull-down resistors on unused inputs?

Yes - unused inputs must be terminated to VCC or GND. Floating inputs cause increased ICC, unpredictable output states, and potential oscillation due to internal gate threshold ambiguity; 10 kΩ pull-up/down is sufficient for stability.