18Bit To 36Bit Registered Bus Exchanger With 3-State Outputs 80-TSSOP -40℃ to 85℃
The SN74ALVCHG162282 is an 18-bit to 36-bit registered bus exchanger. This device is intended for use in applications where data must be transferred from a narrow high-speed bus to a wide lower-frequency bus. It 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. For data transfer in the B-to-A direction, the select SEL\\\\ input 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 1B path, with a single storage register in the 2B path. Data flow is controlled by the active-low output-enable OE\\\\ and direction-control DIR input. DIR is registered to synchronize the bus direction changes with the clock.
The A-port N-channel output transistors are sized at 450 µm and the P-channel output transistors are sized at 700 µm. All A-port outputs have equivalent 50- series resistors.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The switching characteristics are based on 25-pF A port and 80-pF B port loads, but are tested with the standard 50-pF load.
The SN74ALVCHG162282 is characterized for operation from 0°C to 70°C.
