STMicroelectronics 74AC08MTR

Overview

74AC08MTR from STMicroelectronics is a quad 2-input AND gate in TSSOP-14 package, operating across 2V–6V supply, with 4ns typical propagation delay at 5V, ±24mA symmetrical output drive, and 2µA max quiescent current at 25°C - used in high-speed digital logic interfacing and level translation in industrial control modules.

For engineers reviewing the 74AC08MTR datasheet, 74AC08MTR pinout, 74AC08MTR application, or 74AC08MTR equivalent, key selection criteria include transmission-line driving capability (50Ω), latch-up immunity, ESD tolerance (2kV), and compatibility with legacy 74-series logic families.

Technical Context

This device implements four independent AND gates using sub-micron C2MOS technology with buffered outputs, delivering balanced tPLH/tPHL delays and high noise immunity (28% VCC). It supports rail-to-rail input voltage range (0 to VCC) and operates from –55°C to +125°C.

The internal protection circuitry ensures 2kV HBM ESD robustness on all I/O pins, while symmetrical output impedance enables clean signal integrity on 50Ω transmission lines - critical for backplane and board-level interconnects without external termination.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, thin-profile surface-mount with exposed pad not present; RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Compared with 74HC08PW and SN74AC08PWR, the 74AC08MTR offers superior transmission-line drive and tighter propagation delay matching - critical for high-speed deterministic logic where signal fidelity and timing skew directly impact system-level jitter budget.

Availability

74AC08MTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AC08MTR 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 microcontrollers, analog ICs, power devices, and logic families for industrial, automotive, and consumer markets.

The 74AC logic family targets high-speed, low-power digital interfacing with enhanced robustness - specifically engineered for noise-prone industrial environments and mixed-voltage system integration.

FAQ

Is 74AC08MTR pin-compatible with 74LS08?

Yes - it uses identical pinout and logic function mapping for all 14 pins, including VCC (14), GND (7), and four independent AND gates (A/B inputs and Y outputs). No PCB redesign is needed for drop-in replacement, though supply voltage range differs (74LS08: 4.75–5.25V only).

What is the maximum recommended capacitive load for stable 4ns operation?

Stable 4ns typical propagation delay is specified with CL = 50 pF and RL = 500 Ω. Driving heavier loads (>75 pF) increases tPD nonlinearly; for 50Ω transmission lines, ensure trace length ≤15 cm to maintain incident-wave switching behavior without overshoot.

Does 74AC08MTR support mixed-voltage operation (e.g., 3.3V inputs with 5V VCC)?

Yes - inputs tolerate 0 to VCC, so 3.3V logic signals are fully valid when VCC = 5V. VIH(min) = 2.1V at VCC = 3.0V and 3.15V at VCC = 4.5V, ensuring reliable recognition of 3.3V-high levels across full temperature range.

Can 74AC08MTR be used in hot-swap applications?

It features improved latch-up immunity and 2kV HBM ESD protection, but lacks explicit hot-swap qualification. For controlled insertion, use series current-limiting resistors (≥10Ω) on VCC and I/O lines, and ensure power ramp rates stay below 1V/ms to avoid triggering internal protection circuits.