USB3250 Standard Microsystems Corporation, USB3250 Datasheet - Page 19
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USB3250
Manufacturer Part Number
USB3250
Description
Usb2.0 PHY IC
Manufacturer
Standard Microsystems Corporation
Datasheet
1.USB3250.pdf
(48 pages)
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USB2.0 PHY IC
Datasheet
SMSC GT3200, SMSC USB3250
6.2
10.71 * |V
Figure 6.2 Full-Speed Driver VOL/IOL Characteristics for High-speed Capable Transceiver
High-speed USB signals are characterized using eye patterns. For measuring the eye patterns 4
points have been defined (see
eye patterns in several 'templates'. The two templates that are relevant to the PHY are shown below.
High-speed Signaling Eye Patterns
I
(mA)
OH
out
|
22
0
0
Drive Low
Test Limit
Slope = 1/40.5 Ohm
Figure
1.09V
DATASHEET
6.3). The Universal Serial Bus Specification Rev.2.0 defines the
19
0.434*V
Slope = 1/49.5 Ohm
OH
V
out
(Volts)
Revision 1.5 (03-24-06)
V
OH