STMicroelectronics 74VHCT04ATTR

Overview

74VHCT04ATTR from STMicroelectronics is a high-speed CMOS hex inverter with TTL-compatible inputs, 4.7 ns typical propagation delay at 5 V, ±8 mA symmetrical output drive, and operation across 4.5–5.5 V supply. It provides power-down protection, 2 kV ESD immunity, and is used in 5 V/3 V level-shifting logic interfaces within industrial control panels.

For engineers reviewing the 74VHCT04ATTR datasheet, 74VHCT04ATTR pinout, 74VHCT04ATTR application, or 74VHCT04ATTR equivalent, key selection criteria include input threshold compatibility (VIH ≥ 2 V, VIL ≤ 0.8 V), output drive strength under load (IOH/IOL ≥ 8 mA), propagation delay symmetry (tPLH ≅ tPHL), and TSSOP-14 package thermal and routing constraints.

Technical Context

This device implements six independent inverting buffers using sub-micron C2MOS technology with three-stage internal buffering for enhanced noise immunity. All inputs accept 0–7 V regardless of VCC, enabling robust hot-swap and mixed-voltage interfacing.

It features diode-protected I/O with ±20 mA DC input/output diode current rating and supports dynamic switching up to 1 MHz with CL = 50 pF. The symmetrical output impedance ensures matched rise/fall times and low ground bounce (VOLP ≤ 0.8 V).

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 SN74VHC04PW and 74LVC04PW, the 74VHCT04ATTR uniquely supports 0–7 V input tolerance and TTL-compatible thresholds at 5 V, making it the only choice for legacy 5 V system integration with mixed-voltage resilience and guaranteed 8 mA drive.

Availability

74VHCT04ATTR 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 and long-term lifecycle support.

Supply support for 74VHCT04ATTR 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 logic devices for industrial, automotive, and consumer markets.

The VHCT logic family targets 5 V systems needing TTL compatibility, low power, and robust I/O - specifically engineered for seamless replacement of legacy 74LS04 in upgrade paths with improved speed and noise immunity.

FAQ

Is the 74VHCT04ATTR pin-compatible with standard 74LS04 devices?

Yes - it uses identical pinout and logic function (six independent inverters) in TSSOP-14, and meets or exceeds 74LS04's VIH/VIL thresholds (2.0 V / 0.8 V min/max), allowing direct drop-in replacement without layout changes.

Can inputs be driven above VCC without damage?

Yes - the input structure accepts 0–7 V regardless of VCC state, including when VCC = 0 V. This enables safe hot-plug operation and eliminates need for external clamping diodes in mixed-voltage interfaces.

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

It is characterized up to CL = 50 pF with tPD ≤ 7.7 ns and VOLP ≤ 0.8 V. For loads exceeding 50 pF, propagation delay increases linearly and ground bounce rises - use local decoupling and minimize trace length to maintain signal integrity.

Does this device support partial power-down operation?

Yes - power-down protection ensures all inputs and outputs enter high-impedance state when VCC = 0 V, preventing back-current flow and bus contention. Inputs remain tolerant to 0–7 V even during power-off conditions.