Features: · Undershoot Protection for Off-Isolation on A and B Ports Up To −2 V· Bidirectional Data Flow, With Near-Zero Propagation Delay· Low ON-State Resistance (ron) Characteristics (ron = 3 Ω Typical)· Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) ...
SN74CBT3305C: Features: · Undershoot Protection for Off-Isolation on A and B Ports Up To −2 V· Bidirectional Data Flow, With Near-Zero Propagation Delay· Low ON-State Resistance (ron) Characteristics (ron =...
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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 SN74CBT3305C 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 connected 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.
This SN74CBT3305C is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.
To ensure the high-impedance state of the SN74CBT3305C during power up or power down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.