net2890 ETC-unknow, net2890 Datasheet - Page 67

• Manufacturer Part Number: net2890
• Description: Interface Controller
• Manufacturer: ETC-unknow

Specification
7.4.2 USB Port AC/DC Specification Notes
1.
2.
3.
4.
5.
6.
7.
8.
9.
7.4.3 USB Port AC Waveforms
____________________________________________________________________________________
All voltages measured from the local ground potential, unless otherwise specified.
All timings use a capacitive load (C
Full Speed timings have a 1.5 k pull-up to 3.3 V on the D+ data line.
Measured from 10% to 90% of the data signal.
The rising and falling edges should be smoothly transitioning (monotonic).
Timing difference between the differential data signals.
Measured at crossover point of differential data signals.
The maximum load specification is the maximum effective capacitive load allowed that meets the target
hub V
V
supply (pins designated V
Full Speed: 4 to 20ns at C
DDC
and I
BUS
droop of 330 mV.
DDC
refer to core power supply (pins designated V
C
C
L
L
L
335 Pioneer Way, Mountain View, California 94041
= 50pF
Differential
Data Lines
DDL(LOCAL)
Figure 7-1. Data Signal Rise and Fall Time
TEL [phone] FAX [phone]
NetChip Technology, Inc., 1999
Rev 2.0, Draft 9, July 16, 1999
L
).
) to ground of 50 pF, unless otherwise specified.
http://www.netchip.com
10%
Rise Time
t
R
90%
DD
). V
DDL
NET2890 USB Interface Controller
and I
90%
DDL
Fall Time
refer to local bus power
t
F
10%
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