IDT74FCT16543ET

The FCT16543T 16-bit latched transceivers are built using advanced dual metal CMOS technology. These high-speed, low-power devices are organized as two independent 8-bit D-type latched transceivers with separate input and output control to permit independent control of data flow in either direction. For example, the A-to-B Enable (xCEAB) must be low in order to enter data from the A port or to output data from the B port. xLEAB controls the latch function. When xLEAB is low, the latches are transparent. A subsequent low-to-high transition of xLEAB signal puts the A latches in the storage mode. xOEAB performs output enable function on the B port. Data flow from the B port to the A port is similar but requires using xCEBA, xLEBA, and xOEBA inputs. Flow-through organization of signal pins simplifies layout. All inputs are designed with hysteresis for improved noise margin.

The FCT16543T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The output buffers are designed with power off disable capability to allow "live insertion" of boards when used as backplane drivers.