The IDT74FCT299P is an 8-Bit Universal Shift/Storage Register with 3-state outputs manufactured by Renesas Electronics America (formerly IDT). This versatile device combines shift register and storage register functions, making it suitable for a wide variety of data manipulation and control applications. The '299 offers synchronous parallel load, serial shifting, and storage capabilities, all controlled by input signals.

Applications

• Data multiplexing
• Serial-to-parallel conversion
• Parallel-to-serial conversion
• Storage registers
• Digital delay lines

Features

• 8-bit universal shift/storage register
• 3-state outputs
• Synchronous parallel load
• Serial shifting (left and right)
• Asynchronous master reset
• TTL-compatible inputs
• 5V operation
• Available in a DIP package

Benefits

• Provides flexible data manipulation capabilities
• Enables bidirectional data transfer
• Facilitates serial and parallel data conversion
• Offers a compact storage solution
• Simplifies system design
• Easy to interface with TTL logic
• Suitable for a wide range of applications

Additional Details

The IDT74FCT299P operates from a 5V power supply. It features two mode control inputs (S0 and S1) that determine the operating mode of the register. When S0 and S1 are both low, the register is in the storage mode, retaining its current data. When S0 is low and S1 is high, data shifts right. When S0 is high and S1 is low, data shifts left. When S0 and S1 are both high, data is loaded in parallel. The outputs are enabled by an output enable (OE) pin. The Master Reset (MR) pin asynchronously clears the register. The device is designed to be compatible with TTL logic levels, simplifying interfacing with other digital components. The DIP package makes it easy to prototype and test circuits. The 3-state outputs allow multiple registers to share a common bus. It's commonly used in older computer systems and industrial control equipment where 5V logic levels and through-hole components are still prevalent. Proper clocking and timing considerations are essential for reliable operation. Ensure proper pull-up or pull-down resistors are used on unused inputs to prevent floating inputs.