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Revision 1.6
-32-
02/28/2000
frequency
Transition time
tR
Rise time
75
ns
CL = 50pF
300
ns
CL = 350pF
tF
Fall time
75
ns
CL = 50pF
300
ns
CL = 350pF
tRFM
Rise/Fall time matching
80
120
%
tR / tF
VCRS
Output signal crossover
voltage
1.3
2.0
V
tDRATE
Low speed data rate
1.4775
676.8
1.5225
666.0
Mbs
ns
1.5Mbs
± 1.5%
Source differential driver
jitter
tUDJ1
To next transition
-25
25
ns
tUDJ2
For paired transition
-10
10
ns
CL = 350pF measured at
crossover point
Receiver data jitter
tolerance
tDJR1
To next transition
-75
75
ns
tDJR2
For paired transition
-45
45
ns
CL = 350pF measured at
crossover point
tEOPT
Source EOP width
1.25
1.50
µs
Measured at crossover point
tDEOP
Differential to EOP
transition skew
-40
100
ns
Measured at crossover point
Receiver EOP width
tEOPR1
Must reject as EOP
330
ns
tEOPR2
Must accept
675
ns
Measured at crossover point
Notes:
1. ISB measured with USB in suspend mode; using external square wave clock source (FOSC = 6MHz); transceiver pull-
up resistor of 1.5K
Ω between V3.3 and D- and 15KΩ termination resistors on D+ and D- pins; no port pins sourcing
current. The ISB value is including power consumed by external resistors.
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