onsemi MC74VHC1G05DTT1G: Single Gate Inverter Datasheet and Application Overview

The MC74VHC1G05DTT1G from onsemi is a single inverter gate with open-drain output, fabricated with advanced silicon-gate CMOS technology. This device belongs to the VHC (Very High-Speed CMOS) family, renowned for its high-speed operation while maintaining low power consumption, a characteristic of CMOS integrated circuits. The open-drain output structure provides a versatile interface solution, allowing for voltage level translation, wired-AND connections, and direct drive for indicators and small loads.

A key feature of this IC is its high noise immunity, typical of CMOS products, which ensures reliable operation in electrically noisy environments. The device operates over a broad power supply voltage range from 2.0 V to 5.5 V, making it perfectly suited for interfacing between systems operating at different voltage levels, such as 5V and 3.3V or even lower. Despite its high-speed capability, with propagation delays (tPD) as low as 4.3 ns at 5V, the VHC1G05 maintains very low static power dissipation. The open-drain output requires an external pull-up resistor to function correctly; when the internal MOSFET is off, the output is high (pulled to the resistor's voltage rail), and when on, it actively pulls the output to a low state.

This single-gate logic solution is provided in an ultra-small SC-75A / SOT-753 surface-mount package, ideal for space-constrained modern electronic designs like smartphones, wearables, and IoT modules. Primary applications include:

Level Shifting: Facilitating seamless communication between devices on different voltage domains.

Wired-AND Logic: Multiple open-drain outputs can be connected to a single bus line with a common pull-up resistor.

LED and Relay Driving: The open-drain output can directly sink current to drive LEDs, relays, or other small loads.

System Interface Logic: Serving as a fundamental building block for creating simple glue logic in larger digital systems.

ICGOODFIND: The onsemi MC74VHC1G05DTT1G is an exceptionally versatile single-gate logic IC. Its combination of high-speed CMOS performance, a wide operating voltage range, and the flexibility of an open-drain output makes it an indispensable component for designers tackling interface challenges, particularly level translation and bus interfacing, in compact and power-sensitive applications.

Keywords: Open-Drain, Level Shifting, VHC, Single Gate, Inverter