STMicroelectronics 74VHCU04TTR

Overview

74VHCU04TTR from STMicroelectronics is a high-speed CMOS hex inverter with single-stage architecture, designed for digital logic inversion and analog oscillator circuits. It operates from 2V to 5.5V, delivers 3.5 ns typical propagation delay at 5V, supports 8 mA output drive, and features power-down input protection enabling 0–7V input tolerance independent of VCC. Used in 5V-to-3V level-shifting and crystal oscillator buffering.

For engineers reviewing the 74VHCU04TTR datasheet, 74VHCU04TTR pinout, 74VHCU04TTR application, or 74VHCU04TTR equivalent, key selection criteria include symmetrical output impedance (|IOH| = IOL ≥ 8 mA), TTL-compatible input thresholds, latch-up immunity, ESD robustness (2 kV HBM), and operation across –55°C to +125°C.

Technical Context

The 74VHCU04TTR implements six independent single-stage CMOS inverters using sub-micron C2MOS technology, enabling direct use in Pierce-type crystal oscillator feedback loops without external biasing. Its input structure accepts voltages up to 7V regardless of VCC, and all I/O pins include diode clamps and ESD protection.

Propagation delays are balanced (tPLH ≅ tPHL), and DC noise immunity is guaranteed at ≥10% VCC for both high- and low-level inputs. The device meets stringent industrial temperature requirements (–55°C to +125°C) and supports dynamic switching at 1 MHz with CL = 15 pF or 50 pF loads.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.05 mm max 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 MC74VHC04DT, the 74VHCU04TTR uniquely combines wide VCC range, 0–7 V input tolerance, and single-stage oscillator suitability - making it irreplaceable in mixed-voltage timing and robust industrial signal conditioning.

Availability

74VHCU04TTR is available at Aetrix Electronics and suitable for crystal oscillator buffering, 5V-to-3V level shifting, and industrial control logic requiring stable component supply across extended temperature ranges.

Supply support for 74VHCU04TTR 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The VHCU logic family targets high-speed, low-power, mixed-voltage digital interfacing - specifically engineered for robustness in noisy industrial environments and flexibility in multi-rail system design.

FAQ

Can the 74VHCU04TTR be used in a crystal oscillator circuit without external bias resistors?

Yes. Its single-stage CMOS inverter architecture provides inherent gain and phase inversion required for Pierce oscillators. The input threshold and output drive characteristics allow direct connection to quartz crystals with appropriate load capacitors - no external DC bias network is needed.

What is the maximum input voltage allowed when VCC = 0 V?

Up to +7.0 V is permitted on any input pin even with VCC = 0 V, thanks to integrated power-down protection diodes. This enables safe hot-plug operation and prevents latch-up during power sequencing mismatches in multi-rail systems.

Does the 74VHCU04TTR support operation at –55°C?

Yes. It is fully specified from –55°C to +125°C per Recommended Operating Conditions (Table 5). All DC and AC parameters - including propagation delay, output drive, and noise immunity - are guaranteed across this full industrial temperature range.

How does the 74VHCU04TTR differ from standard 74HC04 devices?

It adds 0–7 V input tolerance independent of VCC, improved latch-up immunity, lower quiescent current (2 µA max), tighter propagation delay matching (tPLH ≅ tPHL), and enhanced ESD protection (2 kV HBM). These enhancements make it suitable for mixed-voltage and high-reliability applications where standard HC devices fall short.