The SN54ALS563BJ from Texas Instruments is a high-performance, octal D-type transparent latch with 3-state outputs designed for 8-bit storage in a wide array of digital systems. This integrated circuit is a member of the ALS (Advanced Low-Power Schottky) logic family, which offers a balanced trade-off between speed and power consumption, making it suitable for interfacing with bus-oriented systems.

The device contains eight D-type latches with 3-state output buffers. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. Once LE is taken low, the Q outputs are latched at the levels that were set up at the D inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the latter case, the outputs neither load nor drive the bus lines significantly, allowing for multiple devices to be connected to the bus without the risk of high power dissipation due to bus contention.

The SN54ALS563BJ is characterized for operation over the full military temperature range of -55°C to 125°C. The device is packaged in a standard 20-pin ceramic dual in-line package (CERDIP) or plastic dual in-line package (PDIP), providing robustness and reliability for various applications, including military and aerospace.

Key features of the SN54ALS563BJ include:

• Eight D-type latches with 3-state outputs for bus-oriented applications
• 4.5V to 5.5V operating voltage range, suitable for TTL environments
• Output capability: Bus driver
• ICC reduced by 50% on 54ALS only
• Edge-triggered D-type inputs for transparent latch operation
• Buffered control inputs to reduce input loading
• Military-grade temperature range for enhanced reliability

The SN54ALS563BJ is ideal for applications requiring the storage and retrieval of data bits, such as computers, registers, controllers, and more. Its ability to operate in extreme temperatures and to interface with other devices on a shared bus makes it a versatile and essential component in advanced digital systems.