CY74FCT823T

These bus interface registers are designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider address/data paths or buses carrying parity. The FCT821T is a buffered, 10-bit wide version of the popular FCT374 function. The FCT823T is a 9-bit wide buffered register with clock enable (EN) and clear (CLR) ideal for parity bus interfacing in high-performance micropro-grammed systems. The FCT825T is an 8-bit buffered register with all the FCT823T controls plus multiple enables (OE1, OE2, OE3) to allow multiuser control of the interface, e.g., CS, DMA, and RD/WR. They are ideal for use as an output port requiring high IOL/IOH.

These devices are designed for high-capacitance load drive capability, while providing low-capacitance bus loading at both inputs and outputs. Outputs are designed for low-capacitance bus loading in the high-impedance state and are designed with a power-off disable feature to allow for live insertion of boards.