The 74F109SJX is a dual JK positive edge-triggered flip-flop manufactured by Fairchild/ON Semiconductor. This device belongs to the Fast (F) series of TTL logic, offering high-speed performance and is designed for a wide range of digital applications requiring storage and manipulation of binary data. Each flip-flop operates independently, allowing for versatile use in counters, shift registers, and control circuits. The 'SJX' suffix typically indicates a specific package and temperature range.

Applications

• Counters
• Shift registers
• Control circuits
• Frequency dividers
• Data storage

Features

• Dual JK flip-flop
• Positive edge-triggered
• High-speed performance
• Direct clear input
• TTL compatible

Benefits

• Enables the implementation of complex sequential logic functions
• Provides reliable data storage and manipulation
• Offers high-speed operation for demanding applications
• Simplifies circuit design with direct clear input
• Ensures compatibility with other TTL logic devices

Additional Details

The 74F109SJX operates from a 5V power supply and features a typical propagation delay of around 6 ns. Each flip-flop has J, K, clock, and clear inputs. The flip-flop changes state on the positive-going edge of the clock pulse, based on the logic levels present at the J and K inputs. The direct clear input allows for asynchronous resetting of the flip-flop output. The device is typically packaged in a surface-mount package, making it suitable for modern circuit board designs.

This flip-flop is commonly used in synchronous and asynchronous counters, where it can be configured to divide the input frequency or to count up or down. It is also found in shift registers, where it is used to store and shift data bits sequentially. In control circuits, it can be used to implement state machines and other complex logic functions. Its high-speed performance makes it suitable for use in demanding applications where timing is critical.