IDT74LVCH16276A

The LVCH16276A synchronous bus exchanger is built using advanced dual metal CMOS technology.The LVCH16276A is a high-speed, bidirectional, 12-bit, registered, bus multiplexer for use in synchronous memory interleaving applications. All registers have a common clock and use a clock enable (CExxx ) on each data register to control data sequencing. The output enables and mux select (OEA , OEB and SEL) are also under synchronous control allowing direction changes to be edge triggered events.

The tri-port bus exchanger has three 12-bit ports. Data may be transferred between the A port and either/both of the B ports. The clock enable (CE1B , CE2B , CEA1B and CEA2B ) inputs control the data storage. Both B ports have a common output enable (OEB ) to aid in synchronously loading the B registers from the B port.

All pins of the LVCH16276A can be driven from either 3.3V or 5V devices. This feature allows the use of this device as a translator in a mixed 3.3V/5V supply system.

The LVCH16276A has been designed with a ±24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.

The LVCH16276A has "bus-hold" which retains the inputs' last state whenever the input goes to a high impedance. This prevents floating inputs and eliminates the need for pull-up/down resistors.