2.125Gbps/1.063Gbps, 3.3V
Fibre Channel Repeaters
0.1µF
Zo = 50Ω
300Ω
Zo = 50Ω
0.1µF
Zo = 50Ω
43Ω
176Ω
Zo = 50Ω
43Ω
Figure 5. 50Ω Termination Applications
75Ω DIFF
(LOOKING OUT)
IN+
OUT+
MAX3770
MAX3771
IN-
OUT-
100Ω DIFF
(LOOKING IN)
150Ω DIFF
(LOOKING OUT)
IN+
OUT+
MAX3770
MAX3771
IN-
OUT-
100Ω DIFF
(LOOKING IN)
Table 1. Output States When Using
Control Functions
INPUT PIN LEVEL
LOCKEN
CLKEN
GND
GND
GND
VCC
VCC
VCC
GND
VCC
OUTPUT FUNCTION
LOCK
CLOCK
Disabled
Disabled
Disabled
Enabled
Enabled
Disabled
Enabled
Enabled
FILT+
FILT-
GND
IN+
IN-
GND
VCC
VCC
0.1µF
Zo = 50Ω
300Ω
Zo = 50Ω
0.1µF
43Ω
176Ω
Zo = 50Ω
Zo = 50Ω
43Ω
Chip Topography
0.067"
(1.702mm)
LOCK
CLK+
CLK-
CLKEN
GND 0.066"
(1.676mm)
OUT+
OUT-
LOCKEN
TRANSISTOR COUNT: 1217
SUBSTRATE CONNECTED to GND
_______________________________________________________________________________________ 7