Owner manual

76
AT76C551
1612D–08/01
AC Characteristics
Note: 1. With external 27W series resistor
Table 19. DP, DM Driver Characteristics
Symbol Parameter Condition Min Max Unit
t
R
Rise Time C
L
= 50 pF 4 20 ns
t
F
Fall Time C
L
= 50 pF 4 20 ns
t
RFM
TR/TF Matching 90 110 %
V
CRS
Output Signal Crossover Except First Transition From Idle State 1.3 2.0 V
Z
DRV
(1)
Driver Output Resistance Steady State Drive 29 44 W
Table 20. DP, DM Data Source Timings
Symbol Parameter Condition
Min Max Unit
T
DRATE
Full Speed Data Rate Average Bit Rate 11.97 12.03 Mbs
T
FRAME
Frame Interval 0.9995 1.0005 ms
T
DJ1
T
DJ2
Source Diff Driver Jitter To Next Transition For Paired Transitions -3.5
-4.0
3.5
4.0
ns
ns
T
FDEOP
Source Jitter for Differential
Transition to SE0 Transition
-2 5 ns
T
FEOPT
Source SE0 interval of EOP 160 175 ns
T
FEOPR
Receiver SE0 interval of EOP 82 ns
T
JR1
T
JR2
Recvr Data Jitter Tolerance
To Next Transition
For Paired Transitions
-18.5
-9
18.5
9
ns
ns
T
FST
Width of SE0 interval during differential transition 14 ns