onsemi MC74VHCT04ADT

Overview

MC74VHCT04ADT from ON Semiconductor is a hex inverter IC designed for high-speed 5V logic level translation and signal inversion in mixed-voltage digital systems. It features TTL-compatible inputs, full 5V CMOS output swing, 4.7ns typical propagation delay at VCC = 5V, 2μA maximum quiescent supply current at 25°C, and operates across 4.5V–5.5V. It is used in bus buffering, clock signal conditioning, and 3.3V-to-5V interface circuits.

For engineers reviewing the MC74VHCT04ADT datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage tolerance (up to 7V), power-down protection on all I/O, balanced propagation delays, latchup immunity (>300mA), and TSSOP-14 package compatibility with standard logic footprints.

Technical Context

The MC74VHCT04ADT implements six independent inverting buffers using silicon-gate CMOS technology, achieving bipolar-Schottky TTL speed while retaining CMOS power efficiency. Its three-stage internal architecture includes an output buffer that enhances noise immunity and stabilizes output transitions.

Input structures tolerate 0V–5.5V regardless of VCC and remain protected when VCC = 0V; outputs are similarly safeguarded against supply–signal mismatch during hot insertion or battery-backup scenarios. Inputs accept TTL-level signals (VIL = 0.8V, VIH = 2.0V), enabling reliable interfacing between 3.3V controllers and 5V peripherals.

Key Specifications

Pinout & Package

TSSOP-14 package (Case 948G−01), 5.0mm × 4.4mm footprint, 0.65mm lead pitch, exposed pad not present, RoHS-compliant and Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT04DR and 74VHC04MTCX, the MC74VHCT04ADT uniquely combines TSSOP-14 packaging, 7V input tolerance, TTL compatibility, and documented Pb-free compliance-making it optimal for space-constrained, mixed-voltage industrial control boards requiring long-term supply stability.

Availability

MC74VHCT04ADT is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, automotive body control modules, communications baseband timing, test equipment digital pattern generation, and 3.3V-to-5V interface circuits requiring stable component supply across multi-year production cycles.

Supply support for MC74VHCT04ADT 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The MC74VHCT04ADT belongs to the VHCT logic family, engineered specifically for seamless 3.3V/5V system interfacing with TTL compatibility, low power, and enhanced robustness in harsh electrical environments.

FAQ

What is the maximum input voltage rating for the MC74VHCT04ADT?

The MC74VHCT04ADT supports DC input voltages from –0.5V to +7.0V, independent of VCC. This allows safe interfacing with 3.3V, 5V, and even overvoltage-tolerant systems without external clamping diodes. The input protection structure remains functional even when VCC = 0V, making it suitable for hot-insertion and battery-backup applications where supply sequencing is uncontrolled. This specification is verified per ON Semiconductor's MC74VHCT04A/D datasheet Rev. 3.

Does the MC74VHCT04ADT support true TTL-level input recognition?

Yes, the MC74VHCT04ADT has TTL-compatible inputs with guaranteed VIH = 2.0V (min) and VIL = 0.8V (max) across its full operating temperature range (–40°C to +85°C). This ensures reliable detection of standard TTL logic thresholds, enabling direct replacement of legacy 74LS04 devices in 5V systems without redesign. The input stage is optimized for noise margin and transition speed, maintaining compatibility while delivering CMOS-level power efficiency. This behavior is confirmed in the DC Electrical Characteristics table of the official datasheet.

What is the propagation delay variation across all six inverters in the MC74VHCT04ADT?

The MC74VHCT04ADT exhibits balanced propagation delays (tPLH and tPHL) across all six channels due to its monolithic silicon-gate CMOS design and matched internal layout. At VCC = 5.0V and CL = 15pF, typical delay is 4.7ns with a maximum of 6.7ns over temperature and voltage extremes. Skew between any two outputs is minimized by symmetrical routing and shared biasing - critical for clock tree and parallel data path applications. This performance is specified in the AC Electrical Characteristics section of the MC74VHCT04A/D datasheet.

Can the MC74VHCT04ADT be used in a 3.3V-only system?

No - the MC74VHCT04ADT is designed for 4.5V to 5.5V operation and is not characterized or guaranteed for reliable function below 4.5V. While inputs tolerate 3.3V logic levels, the device requires VCC ≥ 4.5V to meet VOH/VOL, tPD, and noise immunity specifications. Attempting to operate at 3.3V may result in marginal output swing, increased propagation delay, or undefined behavior. For 3.3V-native systems, consider the 74VHC04 or 74LVC04 families instead. This limitation is explicitly stated in the Recommended Operating Conditions table.

Is the MC74VHCT04ADT pinout compatible with standard 74-series hex inverters?

Yes, the MC74VHCT04ADT uses the industry-standard 14-pin TSSOP pinout (DT suffix) matching 74HCT04, 74LS04, and 74AC04 devices: inputs on pins 1,3,5,9,11,13; outputs on pins 2,4,6,8,10,12; VCC on pin 14; GND on pin 7. This pin-for-pin compatibility enables drop-in replacement in existing layouts without PCB revision. Mechanical dimensions and solder pad layout follow JEDEC MO-153 (TSSOP-14), ensuring compatibility with automated assembly processes. Confirmed via Figure 2 (Pinout) and Ordering Information tables in the datasheet.