Philips 74F552
The 74F522 Octal Registered Transceiver contains two 8-bit registers for temporary storage of data flowing in either direction. Each register has its own clock (CPR, CPS) and Clock Enable (CER, CES) inputs, as well as a flag flip-flop that is set automatically as the register is loaded. The flag output will be reset when the Output Enable returns to High after reading the output port.FEATURES
● 8-bit bidirectional I/O port with handshake● Register status flag flip-flops
● Separate clock enable and output enable
● Parity generation and parity check
● B outputs and parity output sink 64mA
DESCRIPTION
Each register has a separate Output Enable (OEAS, OEBR) for its 3-State buffer. The separate Clock