See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

DL | 56

Temp:

I (-40 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

SN74ALVCH16409DL


9-Bit 4-Port Universal Bus Exchanger With 3-State Outputs

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Texas Instruments SN74ALVCH16409DL

This 9-bit, 4-port universal bus exchanger is designed for 1.65-V to 3.6-V VCC operation.

The SN74ALVCH16409 allows synchronous data exchange between four different buses. Data flow is controlled by the select (SEL0-SEL4) inputs. A data-flow state is stored on the rising edge of the clock (CLK) input if the select-enable (SELEN\) input is low. Once a data-flow state has been established, data is stored in the flip-flop on the rising edge of CLK if SELEN\ is high.

The data-flow control logic is designed to allow glitch-free data transmission.

When preset (PRE\) transitions high, the outputs are disabled immediately, without waiting for a clock pulse. To leave the high-impedance state, both PRE\ and SELEN\ must be low and a clock pulse must be applied.

To ensure the high-impedance state during power up or power down, PRE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

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