SN74CBT3383C

10BIT FET BUSEXCHANGE SWITCH

5V BUS SWITCH WITH -2V UNDERSHOOT PROTECTION

SCDS175 − SEPTEMBER 2004

2

POST OFFICE BOX 655303

description/ordering information (continued)

The SN74CBT3383C is a high-speed TTL-compatible FET bus-exchange switch with low ON-state resistance

SN74CBT3383C 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 SN74CBT3383C is organized as a 10-bit bus switch, or as a 5-bit bus-exchange switch with a single

output-enable (BE) input that provides data exchanging between four signal ports. The select (BX) input controls

the data path of the bus-exchange switch. When BE is low, the A port is connected to the B port, allowing

bidirectional data flow between ports. When BE is high, a high-impedance state exists between the A and B

ports.

damaging current will not backflow through the device when it is powered down. The device has isolation during

power off.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

FUNCTION TABLE

(each 5-bit bus-exchange)

INPUTS

INPUTS/OUTPUTS

FUNCTION

BE

BX

1A1−5A1

1A2−5A2

FUNCTION

L

L

1B1−5B1

1B2−5B2

A1 port = B1 port,

A2 port = B2 port

L

H

1B2−5B2

1B1−5B1

A1 port = B2 port,

A2 port = B1 port

H

X

Z

Z

Disconnect