USB3250 Standard Microsystems Corporation, USB3250 Datasheet - Page 21

• Manufacturer Part Number: USB3250
• Description: Usb2.0 PHY IC
• Manufacturer: Standard Microsystems Corporation

USB2.0 PHY IC
Datasheet
SMSC GT3200, SMSC USB3250
Level 1
Level 2
Point 1
Point 2
Point 3
Point 4
Point 5
Point 6
.
The eye pattern in
test point TP2 of
Figure
a percentage of the unit interval (UI), which represents the nominal bit duration for a 480 Mbit/s
transmission rate.
Figure 6.4 Eye Pattern for Transmit Waveform and Eye Pattern Definition
Table 6.6 Eye Pattern for Transmit Waveform and Eye Pattern Definition
6.3). The corresponding signal levels and timings are given in
Level 1
Level 2
525mV in UI following a transition,
475mV in all others
-525mV in UI following a transition,
-475mV in all others
0V
0V
300mV
300mV
-300mV
-300mV
Figure
Figure 6.5
0%
6.3) or a device without a captive cable (signal applied at test point TP3 of
Point 1
VOLTAGE LEVEL (D+, D-)
defines the receiver sensitivity requirements for a hub (signal applied at
Point 5
Point 3
DATASHEET
Unit Interval
21
Point 4
Point 6
Point 2
100%
Differential
Table
Differential
0
V lt
Differential
400mV
-400mV
N/A
N/A
7.5% UI
92.5% UI
37.5% UI
62.5% UI
37.5% UI
62.5% UI
(% OF UNIT INTERVAL)
6.7. Timings are given as
Revision 1.5 (03-24-06)
TIME