HT-273 Octal D-Type Flip-Flop with Direct Clear (TSSOP-20)

Description

The HT-273 (78K series) is a high-performance octal D-type flip-flop designed for robust data storage and synchronization. It integrates eight independent positive-edge-triggered flip-flops within a single package, each featuring an individual data input and a non-inverting Q output. A common buffered clock (CLK) and a shared asynchronous direct clear (CLR) input enable the simultaneous control of all eight storage elements.

The device is engineered for precision: data at the D-inputs is transferred to the corresponding Q-outputs only on the positive-going edge of the clock pulse. Once the clock transition occurs, the flip-flops become insensitive to further changes at the D-input until the next clock cycle, ensuring stable and reliable data capture. The active-LOW clear input provides an efficient way to reset all outputs to a logic LOW state, regardless of the clock or data input status.

Note: Product images are for reference only. For detailed timing diagrams, setup and hold time requirements, and maximum propagation delays, please refer to the manufacturer’s datasheet located in the “Attachments” section.

Features

• Octal Storage: Contains eight independent D-type flip-flops in a compact 20-pin package.
• Simultaneous Control: Common clock and asynchronous direct clear (CLR) inputs for all eight channels.
• Precision Triggering: Positive-edge-triggered operation ensures stable data synchronization.
• Wide Supply Range: Reliable operation from 2V to 5.5V $V_{CC}$.
• Robust ESD/Latch-Up Protection: Exceeds JEDEC standards for human-body and charged-device models.
• Package: TSSOP-20 (SMD) for space-saving PCB assembly.

Benefits

• System Synchronization: Ideal for buffering and managing high-speed data buses in PCs, notebooks, and network switches.
• Reliable Initialization: The direct clear input allows for immediate, asynchronous reset of the register during power-up sequences.
• High Reliability: Designed to withstand rigorous electrical environments with advanced latch-up and ESD protection.

Applications

• Data Management: Serving as high-speed buffers and storage registers in memory systems.
• Sequential Logic: Used in pattern generators and complex shift registers.
• System Interfacing: Essential for data path control in network switches, servers, and embedded computers.
• General Computing: Managing parallel data transmission in modern motherboard and database hardware.

Package Includes

• 1 x HT-273 Octal D-Type Flip-Flop IC (TSSOP-20)

Specifications