SCAS433A - OCTOBER 1993 - REVISED JULY 1995
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The SN74ALVC16270 is a 12-bit to 24-bit registered bus exchanger, which is intended for use in applications where data must be transferred from a narrow high-speed bus to a wide lower-frequency bus. This device is designed specifically for low-voltage (3.3-V) VCC operation.
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. Data flow is controlled by the active-low output enables (OEA\, OEB\). The control terminals are registered to synchronize the bus direction changes with CLK.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVC16270 is available in TI's shrink small-outline (DL) and thin shrink small-outline (DGG) packages, which provide twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area.
The SN74ALVC16270 is characterized for operation from -40°C to 85°C.
View more information about generic part numbers:SN74ALVC16270
Go to the Engineering Design Center to locate information on other TI Semiconductor devices.