The LVCH16646A 16-bit bus transceiver and register is built using advanced dual metal CMOS technology. This high-speed, low power device is organized as two independent 8-bit D-type transceivers with 3state D-type registers.The controls circuitry is organized for multiplexed transmission of data between A bus and B bus either directly or from the internal storage registers. Each 8-bit transceiver/register features direction control (DIR), over-riding Output Enable control (OE) and Select lines (SAB and SBA) to select either real- time data or stored data. Separate clock inputs are provided for A and B port registers. Data on the A or B data bus, or both, can be stored in the internal registers by the low-to-high transitions at the appropriate clock pins. Flow-through organization of signal pins simplifies layout. All inputs are designed with hysteresis for improved noise margin. All pins 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 LVCH16646A has been designed with a 24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.