onsemi MC74VHC1G03DFT2G: Single Gate CMOS Logic Datasheet and Application Overview

The MC74VHC1G03DFT2G from onsemi is a single 2-input open-drain NAND gate fabricated with advanced silicon-gate CMOS technology. As part of the esteemed VHC (Very High-Speed CMOS) family, this IC is engineered to achieve high-speed operation while maintaining low power consumption, a hallmark of CMOS design. Housed in an ultra-compact SC-70-5 / SC-88A surface-mount package, it is an ideal solution for space-constrained modern electronic designs, from portable consumer devices to sophisticated industrial systems.

A defining characteristic of this logic gate is its open-drain output. Unlike a standard push-pull output, the open-drain configuration requires an external pull-up resistor to function. This feature provides exceptional design flexibility, enabling critical functions such as:

Logic Level Shifting: Facilitating interfacing between components operating at different voltage levels (e.g., 1.8V to 5V).

Wired-AND Connections: Allowing multiple outputs to be connected to a single bus line without risk of contention.

Simplified Interfacing: Directly driving loads such as LEDs or relays that may require a higher voltage or current than the core logic supply.

The device is specified for operation over a wide power supply voltage range from 2.0 V to 5.5 V, making it fully compatible with 3.3V and 5V logic systems, as well as lower-voltage microcontrollers. Despite its high-speed capability, with propagation delays typically just a few nanoseconds, it features very low static power consumption, which is crucial for battery-powered applications.

Internally, the circuit is designed with robust protection features, including over-voltage tolerance on all inputs. This allows the inputs to safely withstand voltages up to 7V, even when the device's VCC is 0V, providing an additional margin of safety in volatile environments. The outputs are similarly robust, providing high noise immunity common to CMOS products.

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DFIND Summary: The onsemi MC74VHC1G03DFT2G is a highly versatile, high-speed, open-drain logic gate. Its ultra-small package, wide voltage range, and low power consumption make it an exceptional choice for designers seeking to minimize board space, manage mixed voltage domains, and implement efficient bus interfacing in a vast array of electronic applications.

Keywords: Open-Drain, CMOS Logic, Level Shifting, SC-70-5, VHC Family.