SN74ALVCH16821DL - 20-Bit Bus Interface Flip-Flop from Texas Instruments

The SN74ALVCH16821DL is a high-performance, 20-bit flip-flop with 3-state outputs from Texas Instruments, designed for bus-oriented applications. This integrated circuit is part of the advanced low-voltage CMOS (ALVC) family, which provides a perfect blend of speed and power consumption, making it an ideal choice for interfacing with bus lines in a system. The device operates at a voltage range of 2.3V to 3.6V, which allows for low-voltage operation and compatibility with modern microprocessors and FPGAs.

With its dual 10-bit flip-flops, this device can be employed in a variety of applications, including storage and transfer of data on the positive edge of the clock. Each flip-flop has individual clear, preset, and clock inputs, and Q outputs. The clear function is synchronous, ensuring that all bits are cleared simultaneously with the clock input. The device also features a wide data bandwidth, which is a critical attribute for high-speed data transfer and processing.

The SN74ALVCH16821DL comes in a 56-pin SSOP (Shrink Small-Outline Package) that is designed for space-saving on PCBs. It also features bus hold on data inputs, which eliminates the need for external pull-up or pull-down resistors, saving board space and reducing component count. The outputs, which are 3-state, enable increased flexibility in bus management by allowing the outputs to be placed in a high-impedance state, effectively disconnecting them from the bus.

One of the key advantages of the SN74ALVCH16821DL is its support for live insertion and withdrawal, also known as hot insertion. This feature allows engineers to replace or upgrade the system without powering down or disrupting the operation of the running system. Moreover, the device has balanced propagation delays and output transition times, which contribute to its reliable performance in high-speed applications.

In summary, the SN74ALVCH16821DL is a versatile and robust flip-flop ideal for bus-oriented systems where speed, low power consumption, and high data integrity are paramount. Its advanced features and compliance with the JEDEC standard make it a smart choice for designers looking for reliable and efficient data storage solutions.