This 12-bit to 24-bit registered bus exchanger is designed for 1.65-V to 3.6-V V_CC operation.

The SN74ALVCH16270 is used in applications in which data must be transferred from a narrow high-speed bus to a wide lower-frequency bus.

The device provides synchronous data exchange between the two ports. Data is stored in the internal registers on the low-to-high transition of the clock (CLK) input when the appropriate CLKEN\ inputs are low. The select (SEL)\ line selects 1B or 2B data for the A outputs. For data transfer in the A-to-B direction, a two-stage pipeline is provided in the A-to-1B path, with a single storage register in the A-to-2B path. Proper control of the CLKENA\ inputs allows two sequential 12-bit words to be presented synchronously as a 24-bit word on the B port.