SNJ54ALS573CJ

The purpose of the buffered output-enable (OE) input in the latches described in the document is to place the eight outputs in either a normal logic state (high or low) or a high-impedance state. When OE is high, the outputs respond to the data inputs. When OE is low, the outputs are latched to retain the data that was set up. The high-impedance state allows the outputs to neither load nor drive the bus lines significantly, providing the capability to drive bus lines without interface or pullup components. OE does not affect the internal operation of the latches, allowing old data to be retained or new data to be entered while the outputs are in the high-impedance state.

The SN54ALS573C is characterized for operation over a temperature range of -55°C to 125°C, while the SN74ALS573C is characterized for operation over a temperature range of 0°C to 70°C.

The octal D-type transparent latches in the document have 3-state outputs.