The SN74CBT3305C 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 device 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 SN74CBT3305C is organized as two 1-bit bus switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is high, the associated 1-bit bus switch is ON, and the A port is conncected to the B port, allowing bidirectional data flow between ports. When OE is low, the associated 1-bit bus switch is OFF, and the high-impedance state exists between the A and B ports.
Undershoot Protection for OFF Isolation on A and B Ports up to -2 V
Bidirectional Data Flow With Near-Zero Propagation Delay