STMicroelectronics 74LCX08MTR

Overview

74LCX08MTR from STMicroelectronics is a low-voltage CMOS quad 2-input AND gate with 5V-tolerant inputs, operating from 2.0V to 3.6V supply, delivering 4.1ns max propagation delay at VCC = 3.0V, ±24mA output drive, and symmetrical output impedance - used in 3.3V logic interfacing with legacy 5V systems such as PCI bus signal conditioning and mixed-voltage digital control planes.

For engineers reviewing the 74LCX08MTR datasheet, 74LCX08MTR pinout, 74LCX08MTR application, or 74LCX08MTR equivalent, key selection criteria include 5V input tolerance, sub-4.5ns propagation delay at 3V, rail-to-rail output swing under 24mA load, latch-up immunity >500mA, and SO-14 package compatibility with 74-series footprint constraints.

Technical Context

This device implements four independent AND gates using sub-micron C2MOS technology, enabling full 3.3V operation while accepting 0–5.5V input signals without level shifters. Its balanced tPLH ≅ tPHL ensures minimal duty-cycle distortion in clocked logic paths.

Power-down protection isolates inputs and outputs when VCC = 0V, supporting hot-swap and partial-power-down modes. Input leakage remains ≤±5µA across 0–5.5V input range, and ESD robustness exceeds 2kV HBM per MIL-STD-883 Method 3015.

Key Specifications

Pinout & Package

74LCX08MTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, 1.27mm lead pitch, compliant with JEDEC MS-012. Pin count and physical layout match industry-standard 74-series footprints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC08APWR and 74ALVC08PW,118, the 74LCX08MTR uniquely guarantees 5V input tolerance without external components while maintaining SO-14 footprint compatibility - critical for drop-in upgrades in legacy 74-series designs.

Availability

74LCX08MTR is available at Aetrix Electronics and suitable for PCI bus interface, 3.3V/5V signal translation, and hot-swappable backplane logic requiring stable component supply across industrial temperature ranges (–55°C to +125°C).

Supply support for 74LCX08MTR 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 74LCX series targets low-voltage, high-speed logic interoperability - specifically engineered to bridge 3.3V systems with 5V legacy infrastructure while minimizing power and board area.

FAQ

Is 74LCX08MTR pin-compatible with standard 74HC08?

Yes - it uses identical SO-14 pinout and Boolean function per gate. However, 74LCX08MTR operates at 2.0–3.6V (not 2.0–6.0V), and its inputs tolerate up to 5.5V regardless of VCC, unlike 74HC08 which requires VCC ≥ VIN for safe operation.

Can 74LCX08MTR be used with VCC = 2.5V?

Yes - all DC and AC specifications are guaranteed from 2.0V to 3.6V. At VCC = 2.5V, VOH is ≥2.3V (IOH = –12mA), VOL ≤0.45V (IOL = 12mA), and tPD ≤4.8ns, meeting requirements for 2.5V logic families with adequate noise margin.

Does 74LCX08MTR require external pull-up resistors on inputs?

No - inputs have no internal pull-ups. They are high-impedance CMOS with ≤±5µA leakage, so external biasing is required only if floating states must be avoided; unused inputs should be tied to VCC or GND to prevent oscillation and excess current draw.

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

Driving CL ≤50pF is validated per datasheet test conditions (tPD, skew, VOH/VOL). With RL = 500Ω and CL = 50pF, output transitions remain monotonic and within spec. For loads >50pF, propagation delay increases linearly (~100ps/pF), and ringing may occur without series termination.