STMicroelectronics 74ACT02MTR

Overview

74ACT02MTR from STMicroelectronics is a quad 2-input NOR gate in advanced high-speed CMOS technology, operating at 4.5–5.5 V with 5 ns typical propagation delay, 24 mA output drive, and TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). It interfaces directly with TTL, NMOS, and CMOS systems in digital logic control and bus arbitration circuits.

For engineers reviewing the 74ACT02MTR datasheet, 74ACT02MTR pinout, 74ACT02MTR application, or 74ACT02MTR equivalent, key selection criteria include symmetrical output impedance (|IOH| = IOL ≥ 24 mA), 50 Ω transmission line driving capability, latch-up immunity, and ESD protection up to 2 kV.

Technical Context

The device implements four independent NOR gates using sub-micron C2MOS process with three-stage buffered output architecture, enabling high noise immunity and stable switching. Each gate features balanced tPLH ≅ tPHL propagation delays and operates across -55°C to +125°C.

Input and output structures incorporate protection diodes for ±20 mA DC diode current handling and transient voltage suppression. The internal design supports incident-wave switching on 50 Ω transmission lines and meets VIH/VIL compatibility requirements for TTL-level interfacing.

Key Specifications

Pinout & Package

74ACT02MTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package per mechanical drawing P013G, with 1.27 mm pitch, 8.55–8.75 mm body width, and 5.8–6.2 mm body length.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input NOR gate applications.

Compared with SN74ACT02DR and 74VHC02M, the 74ACT02MTR uniquely delivers extended temperature support, 2 kV ESD hardening, and verified 50 Ω line driving-making it the sole option for mission-critical industrial and automotive logic interfacing.

Availability

74ACT02MTR is available at Aetrix Electronics and suitable for industrial PLC logic modules, automotive body control units, and test equipment signal routing requiring stable component supply and long-term lifecycle assurance.

Supply support for 74ACT02MTR 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 industrial, automotive, and consumer markets.

The 74ACT series targets high-speed, low-power 5 V logic interoperability-specifically engineered to replace legacy TTL while maintaining pin and function compatibility across quad gate, flip-flop, and buffer families.

FAQ

Is 74ACT02MTR pin-compatible with standard 74LS02?

Yes, 74ACT02MTR is pin- and function-compatible with 74LS02 and other 74-series 02 devices in 14-pin packages. Its inputs accept TTL voltage levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and outputs drive standard TTL loads. However, it operates at higher speed (5 ns vs. ~15 ns) and lower quiescent current (2 µA vs. ~8 mA), requiring appropriate decoupling for fast edge rates.

What is the maximum capacitive load this device can drive reliably?

The 74ACT02MTR is characterized for CL = 50 pF in AC testing, and its 24 mA output drive supports stable operation into ≥50 pF loads at full speed. For heavier loads (>100 pF), propagation delay increases and edge rate degrades; layout best practices (short traces, local decoupling) are essential to maintain 5 ns timing integrity.

Does this device require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs must be tied to VCC or GND-floating inputs are prohibited due to CMOS susceptibility to noise-induced shoot-through current. The device does not integrate internal pull resistors; external connections ensure defined logic state and prevent increased ICC and potential oscillation.

Can 74ACT02MTR operate at 3.3 V supply?

No. The 74ACT02MTR is specified only for VCC = 4.5 V to 5.5 V. At 3.3 V, VIH/VIL thresholds become non-compliant, output drive collapses below specification, and AC performance (tPD, tPLH/tPHL) is not guaranteed. For 3.3 V systems, consider the 74LVC02 or 74AHC02 families instead.