74ABT16543 16-Bit Registered Transceiver with 3-STATE Outputs is a 16-bit bidirectional data bus transceiver produced by American Fairchild Semiconductor Corporation. The chip adopts a 56-pin SSOP package, and has back-to-back registers, separate Latche Enable, Output Enable, A, B output pins, high impedance glitch-free bus loading and other features.