NXP 74LVC273PW: A Detailed Technical Overview of the Low-Voltage Octal D-Type Flip-Flop
The NXP 74LVC273PW is a high-performance, octal D-type flip-flop integrated circuit designed for use in a wide array of digital systems. Fabricated with NXP's advanced low-voltage CMOS technology, this device is engineered to provide a balance of high-speed operation, low power consumption, and robust functionality, making it a staple in modern electronic design for bus interfacing, data registration, and temporary storage applications.
Housed in a TSSOP-20 (Thin Shrink Small Outline Package) package, the 74LVC273PW integrates eight edge-triggered D-type flip-flops with a common clock (CP) and a common master reset (MR) input. A key operational feature is that the flip-flops store the state of their individual D inputs precisely at the low-to-high transition of the clock pulse. This synchronous operation ensures data integrity and timing predictability across all eight channels. The active-LOW master reset input, when asserted, forces all eight outputs (Q0 to Q7) to a LOW logic state asynchronously, providing an immediate and clear mechanism for initializing the register regardless of the clock state.
A primary advantage of the LVC (Low-Voltage CMOS) family is its wide supply voltage range from 1.65V to 3.6V. This capability allows for seamless integration into both legacy 3.3V systems and modern, lower-voltage environments, facilitating design migration and power reduction. Despite these low operating voltages, the device maintains 5V-tolerant input thresholds, meaning it can safely interface with 5V logic signals without requiring additional level-shifting components, thereby simplifying system design and reducing the bill of materials.
Performance is a critical hallmark of this IC. It boasts high noise immunity and can support very high-speed data transfer, with propagation delays typically in the range of a few nanoseconds. The outputs are capable of sourcing or sinking up to 24 mA, allowing them to drive moderate loads directly, such as LEDs or other IC inputs. Furthermore, the device features very low power consumption, both in static and dynamic operation, which is paramount for battery-powered and energy-sensitive applications.
Typical applications for the 74LVC273PW are extensive. It is commonly deployed as a data register in microprocessors and microcontrollers for latching address or data information. It is also ideal for use in bus interfacing and temporary storage buffers, serving as an intermediary between subsystems operating at different speeds or voltages. Its reset functionality makes it suitable for control and status registers where a defined power-on state is required.
ICGOODFIND: The NXP 74LVC273PW stands out as an exceptionally versatile and reliable octal D-type flip-flop. Its combination of a wide operating voltage, 5V tolerance, high-speed performance, and low power consumption makes it an indispensable component for designers seeking robust data storage and signal conditioning solutions in mixed-voltage digital systems.
Keywords: Low-Voltage CMOS (LVC), Octal D-Type Flip-Flop, 5V-Tolerant Inputs, Master Reset, TSSOP-20 Package.
