LC74FCT164245T

The LC74FCT164245 and LC74FCT164245T 16-bit 3.3- to-5 V translators are fabricated in an advanced twometal- layer CMOS technology. These high-speed lowpower transceivers are designed to be used as interfaces between 3.3 V and 5 V busses in 3.3/5 V dual power supply systems. The use of these products allows system designers to interface TTL-compatible 3.3 V components to 5 V components. The directionality and output enable control in these products is designed to allow them to be used as either two independent 8-bit transceivers or as a single 16-bit transceiver. In use, the A port is interfaced to the 3.3 V bus and the B port to the 5 V bus. The direction control pin ( *DIR) controls the data flow direction and the output enable pin ( *OE) disables directionality control and disables both ports. These control signals can be driven from either 3.3 V system or 5 V system devices. The LC74FCT164245T is optimal for driving largecapacitance loads and low-impedance loads. These output buffers can also be used as an interface between a dualpower- supply system and external 5 V system equipment. The LC74FCT164245 provides a balanced output drive function that incorporates 25  (typical value) supply terminating resistors in each output to minimize ground bounce. The LC74FCT164245 features an inter-rail output amplitude and a control-type output edge rate. These features aim at improved signal quality. The LC74FCT164245 is optimal for use in on-board bus interfaces, and in particular, memory data buses.