Kontron COMe Starterkit Eval T2 - Manual (Page 74)

COM Express Interfaces
2.7.2.2. Discrete Coupling Transformer
Figure 27: Discrete Coupling Transformer
PICMG ® COM Express ® Carrier Board Design Guide Rev. 2.0 / December 6, 2013
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G B E 0 _ L IN K 1 0 0 #
G B E 0 _ L IN K 1 0 0 0 #
V C C _ 3 V 3 _ S B Y V C C _ 3 V 3 _ S B Y
V C C _ 3 V 3 _ S B Y V C C _ 3 V 3 _ S B Y
V C C _ 3 V 3 _ S B Y
V C C _ 3 V 3 _ S B Y
C E X G B E 0 _ M D I0 +
C E X G B E 0 _ M D I0 -
C E X G B E 0 _ M D I1 +
C E X G B E 0 _ M D I1 -
C E X G B E 0 _ M D I2 -
C E X G B E 0 _ M D I2 +
C E X G B E 0 _ M D I3 -
C E X G B E 0 _ M D I3 +
C E X G B E 0 _ C T R E F
C E X G B E 0 _ L IN K 1 0 0 0 #
C E X G B E 0 _ L IN K 1 0 0 #
C E X G B E 0 _ A C T #
C E X G B E 0 _ L IN K #
G R N
L IN K S P E E D L E D
A C T IV IT Y L E D
N o te : A C T -L E D d e s ig n e d fo r fo llo w in g S o u rc e c a s e s :
1 ) G B E 0 _ L IN K # a c tiv e o n L IN K 1 0 /1 0 0 /1 0 0 0 , G B E 0 _ A C T # a c tiv e o n a c tiv ity
2 ) G B E 0 _ L IN K # a c tiv e o n L IN K 1 0 , G B E 0 _ A C T # a c tiv e o n a c tiv ity
3 ) G B E 0 _ L IN K # a c tiv e o n L IN K 1 0 /1 0 0 /1 0 0 0 , G B E 0 _ A C T # in v e rte d
c o p y o f G B E 0 _ L IN K # a n d b lin k s o n a c tiv ity
C 1 5 9
1 n / 2 k V
C 1 5 6 1 0 0 n
U 1 4 0 9 A
74LV C 10
1
2
1 3
1 2
1 :1
T 1
1 :1
A 1
A 2
A 3
A 4
A 5
A 6
A 8
A 9
A 1 0
A 1 2
B 1
B 2
B 3
B 4
B 5
B 6
B 7
B 8
B 9
B 1 1
B 1 0
B 1 2
A 1 1
A 7
U 1 4 1 0 A
74LV C 11
1
2
1 3
1 2
C 1 5 8
1 0 0 n
U 1 4 0 8 B
74LV C126
5 6
4
R 124
U 1 3
74LV C125
O E # 1
A 2
G N D 3 Y 4
V C C 5
G R N O R G
D 2 7
G R N O R G
2
1
R 1 2 6
R 1 1 9 7 5
R 1 1 8 7 5
1 2 3 4 5 6 7 8
J 2 3
R J 4 5
1 2 3 4 5 6 7 8
M X 0 + 1
M X 0 - 2
M X 1 + 3
M X 1 - 6
M X 2 + 4
M X 2 - 5
M X 3 + 7
M X 3 - 8
U 1 4
74LV C125
O E # 1
A 2
G N D 3 Y 4
V C C 5
C 1 5 7 1 0 0 n
D 2 8
2
1
R 2 0 0
1 0 k
C 1 5 5 1 0 0 n
R 1 2 0 7 5
R 1 2 2
1 0 k
R 2 0 1
1 0 k
R 1 2 3
1 0 k
C 1 5 4 1 0 0 n
R 1 2 1 7 5
100
100