STMicroelectronics 74LCX00MTR

Overview

74LCX00MTR from STMicroelectronics is a low-voltage CMOS quad 2-input NAND gate with 5V-tolerant inputs, operating at 2.0–3.6V supply, delivering 4.3ns max propagation delay at VCC = 3.0–3.6V, ±24mA symmetrical output drive, and PCI bus-level drive capability at 24mA. It serves as a logic-level translation and signal gating component in mixed-voltage 3.3V/5V digital systems such as embedded controllers and interface bridges.

For engineers reviewing the 74LCX00MTR datasheet, 74LCX00MTR pinout, 74LCX00MTR application, or 74LCX00MTR equivalent, key selection criteria include 5V input tolerance, sub-5ns propagation delay at 3V, symmetrical I_OH/I_OL, latch-up immunity >500mA, and SO-14 package compatibility with legacy 74-series footprints.

Technical Context

The 74LCX00MTR implements four independent NAND gates using sub-micron C2MOS technology, enabling full 3.3V-speed parity with 5V AC/ACT families while consuming significantly less power. Its input protection circuitry ensures 2kV HBM ESD immunity and supports safe interfacing to 5V signal sources without level shifters.

All outputs feature matched high- and low-state impedance (|I_OH| = I_OL ≥ 24mA at VCC = 3V), and propagation delays are balanced (t_PLH ≅ t_PHL) to minimize duty-cycle distortion in clocked or data-path applications. Power-down protection isolates inputs and outputs when VCC = 0V.

Key Specifications

Pinout & Package

74LCX00MTR is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, 1.27mm pitch, compliant with JEDEC MS-012. Pin 1 marked by notch or bevel; pin 7 = GND, pin 14 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC00AD and SN74LV00APWR, the 74LCX00MTR uniquely combines 5V input tolerance, sub-4.5ns speed at 3V, and SO-14 footprint-making it optimal for retrofitting legacy 74-series designs into modern 3.3V systems without redesigning PCBs or adding discrete protection.

Availability

74LCX00MTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, PCI bus interface logic, and low-power embedded controllers requiring stable component supply across extended temperature ranges (–55°C to +125°C).

Supply support for 74LCX00MTR 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74LCX logic family was engineered specifically for high-speed, low-voltage 3.3V operation with 5V-tolerant I/O-targeting seamless migration from 5V TTL/CMOS systems while reducing power and maintaining timing performance.

FAQ

Is 74LCX00MTR pin-compatible with standard 7400-series SO-14 packages?

Yes. The 74LCX00MTR uses the same SO-14 mechanical footprint (JEDEC MS-012), pin numbering, and functional assignment as the original 7400, including identical 1A–4A, 1B–4B, and 1Y–4Y mapping. No PCB redesign is needed for drop-in replacement in existing layouts.

Can 74LCX00MTR safely drive a 50Ω transmission line terminated at 3.3V?

No. While its outputs deliver ±24mA at 3V, driving a 50Ω load to 3.3V requires ~66mA. The device is rated for PCI bus loads (typically 500Ω), not RF transmission lines. Use a dedicated line driver for 50Ω termination.

What is the maximum input frequency supported for reliable NAND operation?

Based on tPD = 4.3ns (max) and balanced delays, the device supports reliable toggle frequencies up to ~116MHz under worst-case conditions. For guaranteed AC performance, limit input signal edges to ≤10ns/V slew rate and maintain CL ≤ 50pF per output.

Does 74LCX00MTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be tied directly to VCC or GND. Internal input protection diodes and low leakage (<5µA) ensure stable logic states without external biasing-reducing BOM count and board space in space-constrained designs.