TPERIOD
Differential
Data Lines
TJR
TJR1
TJR2
Consecutive
Transitions
N * TPERIOD + TJR1
Paired
Transitions
N * TPERIOD + TJR2
FIGURE 8 - RECEIVER JITTER TOLERANCE
Table 5 - Full Speed (12Mbps) Source Electrical Characteristics
CONDITIONS
PARAMETER
Driver Characteristics
Transition Time:
SYM
(NOTE 1, 2, 3)
MIN
TYP
MAX
UNIT
Note 4,5 and
FIGURE 5
CL = 50 pF
Rise Time
TR
4
20
ns
CL = 50 pF
(TR/TF)
Fall Time
TF
4
20
110
2.0
ns
%
V
Rise/Fall Time Matching
TRFM
VCRS
90
1.3
Output Signal
Crossover Voltage
Drive Output Resistance
Data Source Timing
Full Speed Data Rate
ZDRV
Steady State Drive
Ave. Bit Rate
28
43
Ω
TDRATE
11.95
12.03
Mbs
(12 Mb/s +/-
0.25%) Note 8
Frame Interval
TFRAME
1.0 ms +/- 0.05%
0.999
5
1.0005
ms
Source Differential
Driver Jitter
Note 6, 7 and
FIGURE 6
TDJ1
TDJ2
-3.5
-4.0
3.5
4.0
ns
ns
To next Transition
For Paired Transitions
Source EOP Width
TEOPT
TDEOP
Note 7 and
FIGURE 7
Note 7 and
FIGURE 7
Note 7 and
FIGURE 8
160
-2
175
5
ns
ns
Differential to EOP
transition Skew
Receiver Data Jitter
Tolerance
To next Transition
TJR1
TJR2
-18.5
-9
18.5
9.0
ns
ns
For Paired Transitions
EOP Width at receiver
Note 7 and
FIGURE 7
Must reject as EOP
Must Accept
TEOPR1
TEOPR2
40
82
ns
ns
SMSC DS – USB97CFDC2-01
Page 22
Rev. 02-27-07
DATASHEET
SMSC [ SMSC CORPORATION ]
