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MEASUREMENT SYMBOL AND CIRCUIT
Figure 5-1. Termination for TMDS Output Driver
V
A
V
ID
Vcc-0.4 V
Vcc-0.2 V
0.4 V
0 V
-0.4 V
V
ID(pp)
V
IC
V
OD(pp)
t
f
80%
20%
V
OD(U)
0%
0V Differential
100%
t
PLH
V
OC
t
r
V
OD(O)
△V
OC(SS)
V
B
V
swing
t
PLH
Vcc V
Vcc+0.2 V
DC Coupled
AC Coupled
Figure 5-2. Timing Test Circuit and Definitions
Zo = R
T
Zo = R
T
TMDS
Driver
TMDS
Receiver
AVCC
R
T
R
T
TMDS
Receiver
TMDS
Driver
V
ID
Vcc
R
INT
R
INT
A
B
R
T
R
T
AV
CC
C
L
Y
Z
0.5pF
V
Y
V
Z
V
A
V
B
V
swing
= V
Y
- V
Z
V
ID
= V
A
- V
B
