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The SN74CBT6845C is a high-speed TTL-compaTIble FET bus switch with low ON-state resistance (ron), allowing for minimal propagaTIon delay. AcTIve Undershoot-ProtecTIon Circuitry on the A and B ports of the SN74CBT6845C provides protection for undershoot up to –2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.
The SN74CBT6845C is an 8-bit bus switch with a single output-enable (OE) input. When OE is low, the 8-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the 8-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.
