SN74CBTD3384C

10BIT FET BUS SWITCH WITH LEVEL SHIFTING

5V BUS SWITCH WITH 2V UNDERSHOOT PROTECTION

SCDS133A −SEPTEMBER 2003 − REVISED OCTOBER 2003

2

POST OFFICE BOX 655303

description/ordering information (continued)

level shifting for 5-V input down to 3.3-V output levels. Active Undershoot-Protection Circuitry on the A and B

ports of the SN74CBTD3384C 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 SN74CBTD3384C is organized as two 5-bit bus switches with separate output-enable (1OE, 2OE) inputs.

It can be used as two 5-bit bus switches or as one 10-bit bus switch. When OE is low, the associated 5-bit bus

switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When

OE is high, the associated 5-bit bus switch is OFF, and 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 switch)

INPUT

INPUT/OUTPUT

FUNCTION

INPUT

OE

INPUT/OUTPUT

A

FUNCTION

L

B

A port = B port

H

Z

Disconnect

logic diagram (positive logic)

1A1

SW

1B1

1A5

1OE

SW

1B5

2A1

SW

2B1

2A5

2OE

SW

2B5

3

11

1

14

22

13

2

10

15

23