SMSC 1.8V IO Voltage (10%) flexPWR USB3310 - Manual (Page 8)

Hi-Speed USB Transceiver with 1.8V ULPI Interface - Multi-Frequency Reference Clock
Revision 1.11 (10-31-08) 8 SMSC USB3310 REV C
PRODUCT PREVIEW
Figure 4 USB3310 QFN Application Diagram (Host or OTG)
Link Controller
USB331X
RBIAS
DIR
NXT
STP
CLKOUT
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA0
DATA1
REFCLK
VBAT
VDD3.3
VBUS
DM
DP
RESETB
USB
Receptacle
DM
DP
DIR
NXT
STP
CLKOUT
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA0
DATA1
RESETB
6
5
24
1
GND FLAG
2
3
VBUS
GND
SHIELD
C
VBUS
4
3
2
VBUS Switch
OUT EN
C
OUT
C
BYP
IN
ID
4
ID
1
3.1 - 5.5V
Supply
8.06k
Reference
5V
R
VBUS
The capacitor C
VBUS
must be
installed on this side of R
VBUS
.
Signal at REFCLK
must comply with
V
IH
and V
IL
VDD18
21
C
BYP
1.8V Supply
REFSEL[1]
14
REFSEL[0]
15
Pin Strap
Determines
REFCLK
frequency
CPEN
Voltage at the VBUS pin must not be allowed
to exceed V
VMAX
.
R
VBUS
may be installed in this
configuration to assist in protecting
the VBUS pin. 820 Ohms will
protect against VBUS transients up
to 8.5V.
7
8
9
10
12
13
16
17
20
18
19
11
22
23