MIC2551A-2.5
Micrel, Inc.
TRANSMIT
OE#
t
PVZ
V
P
/V
M
t
PZD
D+/D–
t
PDZ
t
PZV
RECEIVE
Timing Diagrams
Figure 1. Enable and Disable Times
Rise Time
Differential
Data Lines
90%
10%
Fall Time
90%
10%
t
R
t
F
Figure 2. Rise and Fall Times
D+
D–
V
OH
V
OL
V
SS
Differential
Data Lines
V
CRS
t
PLH
V
CRS
t
PHL
Figure 3. Receiver Propagation Delay
V
OH
V
OL
D+
D–
t
PLH
V
CRS
Differential
Data Lines
t
PHL
V
CRS
Figure 4. Driver Propagation Delay
Test Circuits
D.U.T.
25pF
Figure 5. Load for V
P
, V
M
, RCV
VTRM
1.5k
D.U.T.
20
15k
C
L
Figure 6. Load for D+, D–
6
March 2010
M9999-030810