32-Bit FET Bus Switch With Active Clamp Undershoot Circuit

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 VCC 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 Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
By Texas Instruments
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