The SN74CBTK32245 device provides 32 bits of high-speed TTL-compatible bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay.

The A and B ports have an active-clamp undershoot-protection circuit. When there is an undershoot, the active-clamp circuit is enabled and current from V_CC is supplied to clamp the output, preventing the pass transistor from turning on.

The device is organized as four 8-bit bus switches, two 16-bit bus switches, or one 32-bit bus switch. When output-enable (OE)\ input is low, the switch is on and port A is connected to port B. When OE\ is high, the switch is open and the high-impedance state exists between the two ports.

This device is fully specified for partial-power-down applications using I_off.