AND8130/D

http://onsemi.com

3

CTRL

Shared Pins

USB

Transceiver

USB

Filter

5

3

2

1

Vcc

NLAS2066

Figure 4.

One side of the switch is protected against high voltage.

It is therefore possible to use this switch to disconnect the

USB input from the pins. Since the Analog Switch provides

a high impedance state, it is not necessary to do anything but

open the USB input filter to the pins. The application

drawing shows the implementation. The shared pins may be

hooked to any high impedance device. This device should

also be capable of withstanding 5.25 V.

CONCLUSION

The NLAS2066 is a tiny 8 pin device occupying only 6

number of pins that go to the outside world connector. The

diagram shows how to connect the NLAS2066 to permit

shared pins. By reducing the number of pins, the designer

can save both space and cost.