P/N: C-1xx-1250(C)-TDFB(3)-SSC2(3/4)x(-G5)
1.25 Gbps CWDM Single Mode Transceiver
Recommended Circuit Schematic
C-1xx-1250-TDFB(3)-SSC2(3/4)
Tx Vcc
Rx Vcc
9
8
7
6 5 4 3
2
1
C6
C5
R1 R3
R9
R5 R7
RD +
RD -
SD
TD +
TD -
Tx Vcc
Rx Vcc
R2 R4
R10 R6 R8
No internal
connection
No internal
connection
Transceiver
Top view
L1
Rx Vcc
Tx Vcc
Notes +3.3V:
Notes +5V:
C3
L2
C1
C2
Vcc
R1=R3=R5=R7=R9=130Ω R1=R3=R5=R7=R9=82Ω
R2=R4=R6=R8=R10=82Ω R2=R4=R6=R8=R10=130Ω
C1=C2=C3=C5=C6=0.1μF C1=C2=C3=C5=C6=0.1μF
C4
C4=10μF
C4=10μF
L1=L2=1μH
L1=L2=1μH
C-1xx-1250C-TDFB(3)-SSC2(3/4)
Tx Vcc
Rx Vcc
9
8
7
6 5 4 3
2
1
C6
C5
R1 R3
R5 R7
RD +
RD -
SD
TD +
TD -
Tx Vcc
Rx Vcc
R6
R8
R2 R4
No internal
connection
No internal
connection
Transceiver
Top view
L1
Rx Vcc
Tx Vcc
Notes +5V:
Notes +3.3V:
C3
L2
C1
Vcc
R1=R3=R5=R7=82Ω
R2=R4=R6=R8=130Ω
C1=C2=C3=C5=C6=0.1μF
C4=10μF
R1=R3=R5=R7=130Ω
R2=R4=R6=R8=82Ω
C1=C2=C3=C5=C6=0.1μF
C4=10μF
C4
C2
L1=L2=1μH
L1=L2=1μH
The split-loaded terminations for ECL signals need to be located at the input of devices receiving those ECL signals.
The power supply filtering is required for good EMI performance. Use short tracks from the inductor L1/L2 to the module
Rx Vcc. / Tx Vcc.
A GND plane under the module is required for good EMI and sensitivity performance.
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DS-6144 Rev 0.0 2010-06-03