NXP 74LVC1G74GT: A Comprehensive Technical Overview of the Single D-Type Flip-Flop with Set and Reset

The NXP 74LVC1G74GT represents a pivotal component in modern digital design, offering a compact and efficient solution for data storage and synchronization tasks. As a single D-type positive-edge triggered flip-flop featuring asynchronous set and reset inputs, this device is engineered for high-performance, low-power applications across a broad spectrum of electronics, from portable consumer devices to industrial control systems.

Architecture and Key Features

At its core, the 74LVC1G74GT is designed around a D-type flip-flop architecture. The data (D) input is captured and stored at the moment the clock (CLK) signal transitions from a low to a high state (positive-edge triggering). This ensures precise synchronization with other system components. A critical feature of this IC is its asynchronous set (SD) and reset (RD) inputs, which operate independently of the clock signal. When activated, these inputs immediately set the output (Q) to a high or low logic level, respectively, providing designers with direct control over the flip-flop's state for initialization or emergency overrides.

Fabricated with NXP's advanced Low Voltage CMOS (LVC) technology, the device operates seamlessly within a wide supply voltage range of 1.65 V to 5.5 V. This makes it exceptionally versatile, capable of interfacing with both older 5V and modern lower-voltage logic families without the need for level-shifting components. Despite its tiny package, the GT (SOT753) variant offers robust performance, including high noise immunity and very low power consumption, both in static and dynamic operation.

Performance Characteristics

The 74LVC1G74GT excels in high-speed applications. It boasts propagation delay times (tPD) as low as 4.5 ns at 5.0 V, enabling it to function effectively in high-frequency circuits. Its ability to drive up to 32 mA at its outputs allows it to directly interface with other components like LEDs or light loads, enhancing its utility. Furthermore, the chip incorporates overvoltage tolerant inputs up to 5.5 V, even when the device is powered down (VCC = 0 V), providing an essential layer of protection in complex or noisy environments.

Application Spectrum

The applications for this single flip-flop are vast and varied. It is ideally suited for:

Signal Synchronization: Aligning data signals with a clock domain.

Data Registers: Serving as a single-bit storage element in larger arrays.

Debouncing Circuits: Cleaning up mechanical switch inputs for digital systems.

Frequency Division: Acting in a divide-by-two counter configuration.

Control Logic: Implementing state machines and general-purpose logic functions where a minimal component count is critical.

ICGOODFIND Summary

The NXP 74LVC1G74GT is a quintessential example of modern logic integration, packing robust functionality into an ultra-small form factor. Its combination of asynchronous control, a wide voltage range, high-speed operation, and excellent power efficiency makes it an indispensable and versatile building block for designers aiming to optimize board space, power budget, and system reliability in today's sophisticated electronic products.

Keywords:

D-Type Flip-Flop

Asynchronous Set-Reset

Low-Voltage CMOS (LVC)

Positive-Edge Triggering

Single-Gate Logic