USBUF01P6

3/7

®

TECHNICAL INFORMATION

APPLICATION EXAMPLE

Fig. A2: Implementation of ST' solutions for USB ports.

Fig. A1: USB Standard requirements.

Host or

Hub port

Twisted pair shielded

Zo = 90ohms

5m max

Hub 0 or

Full-speed function

Untwisted unshielded

3m max

FULL SPEED CONNECTION

LOW SPEED CONNECTION

3.3V

3.3V

D+

D-

D+

D-

D+

D-

D+

D-

1.5k

1.5k

Hub 0 or

Low-speed function

Low-speed USB

Transceiver

Full-speed or

Low-speed USB

Transceiver

15k

Rt

Rt

Ct

Ct

Host or

Hub port

Full-speed or

Low-speed USB

Transceiver

15k

Rt

Rt

Ct

Ct

Rt

Rt

Ct

Ct

Full-speed USB

Transceiver

Rt

Rt

Ct

Ct

15k

15k

D+

D-

CABLE

D-

D+

D+

D-

Upstream port

Downstream port

USBDF01W5

D+

D-

Rt

D+ in

Gnd

D- in

D+ out

D- out

Rt

Rd

Rd

Ct

Ct

Gnd

3.3 V

Rp

Ct

Rt

Ct

Rt

D1

Gnd

D2

D4

D3

3.3V

USBUF01W6

D+

D-

CABLE

D-

D+

D+

D-

Upstream port

Downstream port

USBDF01W5

D+

D-

Rt

D+ in

Gnd

D- in

D+ out

D- out

Rt

Rd

Rd

Ct

Ct

Gnd

3.3 V

Rp

Ct

Rt

Ct

Rt

D1

Gnd

D2

D4

D3

3.3V

USBUF01W6

FULL SPEED CONNECTION

LOW SPEED CONNECTION