Test circuits/timing diagrams (continued) – Rainbow Electronics MAX4889C User Manual
Page 5
MAX4889B/MAX4889C
2.5/5.0Gbps PCIe Passive Switches
Test Circuits/Timing Diagrams (continued)
LOAD
SOURCE
V
OUTp
Z
L
V
OUTn
Z
L
MAX4889B/
MAX4889C
SEL
CALIBRATION
TRACES
V
S+
Z
S
Σ
V
S-
Z
S
Σ
V
CALp
Z
L
V
CALn
Z
L
V
SC+
Z
S
Σ
V
SC-
Z
S
Σ
50%
50%
VCM
50%
50%
VCM
VCM
VCM
t
PDr
t
t
SK1
t
SK2
V
OUTn
THE FREQUENCY OF THE SIGNALS SHOULD BE APPROXIMATELY 1/20 OF THE LOWEST DATA RATE.
V
OUTp
t
PD
= max (t
PDr
, t
)
t
SKEW
= max (t
SK1
, t
SK2
)
V
OUTp
- V
OUTn
V
CALp
- V
CALn
Figure 2. Propagation Delay and Output Skew
_______________________________________________________________________________________
5
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