See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

DBB | 80

Temp:

I (-40 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

SN74ALVCHG162282GR


18-Bit To 36-Bit Registered Bus Exchanger With 3-State Outputs

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Texas Instruments SN74ALVCHG162282GR

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.

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