STMicroelectronics 74LVXU04TTR

Overview

74LVXU04TTR from STMicroelectronics is a low-voltage CMOS hex inverter (single-stage) with 5V-tolerant inputs, operating from 2V to 3.6V supply, delivering 5.0ns typical propagation delay at 3.3V, ±4mA symmetrical output drive, and 2µA max quiescent current - used for level-shifting, crystal oscillator buffering, and noise-sensitive 3.3V logic interfacing.

For engineers reviewing the 74LVXU04TTR datasheet, 74LVXU04TTR pinout, 74LVXU04TTR application, or 74LVXU04TTR equivalent, key selection criteria include 5V input tolerance with 3.3V supply operation, sub-10ns AC timing across temperature, ESD-hardened I/O (2kV HBM), power-down input protection, and TSSOP-14 package compatibility with legacy 74-series footprints.

Technical Context

This device implements six independent single-stage CMOS inverters on a sub-micron C2MOS process, enabling analog use (e.g., Pierce oscillator feedback path) due to its unbuffered, rail-to-rail switching behavior and low-noise output (0.3V typical VOLP at 3.3V). Input structure accepts 0–7V regardless of VCC, supporting hot-swap and mixed-voltage domain interfacing.

Propagation delays are balanced (tPLH ≅ tPHL), skew is limited to 1.0ns max between outputs under load, and dynamic input thresholds (VIHD = 2.0V, VILD = 0.8V at 3.3V) ensure robust noise margin in noisy industrial environments while maintaining compatibility with TTL and LVTTL logic families.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 1.2 mm height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter applications.

Compared with SN74LVC04APW and 74AHC04PW, the 74LVXU04TTR uniquely guarantees safe 5V input operation across its entire 2–3.6V supply range - critical for mixed-voltage systems where supply sequencing cannot be controlled.

Availability

74LVXU04TTR is available at Aetrix Electronics and suitable for crystal oscillator buffering, 3.3V/5V level translation, and low-noise reset signal conditioning requiring stable component supply across automotive infotainment, industrial PLC, and medical wearable designs.

Supply support for 74LVXU04TTR 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, MCU, power, and MEMS products for industrial, automotive, and consumer markets.

The LVX series targets low-voltage, mixed-signal applications demanding 5V-tolerant I/O, sub-µA standby current, and robust latch-up immunity - optimized for portable, battery-powered, and noise-critical systems.

FAQ

Can 74LVXU04TTR be used in a crystal oscillator circuit?

Yes - its single-stage CMOS inverter topology provides the gain and 180° phase shift required for Pierce oscillator configurations. The device is explicitly qualified for this use in ST's application notes, with verified start-up at 32.768kHz using standard load capacitors and no external biasing needed.

What happens to inputs when V_CC = 0V?

Inputs remain high-impedance and protected against backfeeding due to integrated power-down circuitry. The datasheet confirms safe acceptance of 0–7V on any input pin regardless of V_CC state, preventing latch-up or damage during partial power-down sequences in complex power-managed systems.

Is the 74LVXU04TTR pin-compatible with standard 74HC04 in TSSOP-14?

Yes - it uses identical TSSOP-14 pinout and logic function mapping (1A→1Y, 2A→2Y, etc.), with GND on pin 7 and V_CC on pin 14. However, unlike 74HC04, it operates only up to 3.6V and features 5V-tolerant inputs, making it a functional drop-in replacement only in 3.3V systems requiring input overvoltage resilience.

Does 74LVXU04TTR require external pull-up or pull-down resistors on unused inputs?

No - all inputs have internal protection diodes and defined DC thresholds. ST recommends tying unused inputs to V_CC or GND for lowest noise and power, but floating inputs will not cause malfunction due to the device's high input impedance (>10¹²Ω) and built-in ESD structures limiting leakage to ±1µA maximum.