HFBR-7924EWZ Datasheet, PDF (14/17 Pages) AVAGO TECHNOLOGIES LIMITED – Four-Channel Pluggable Parallel Fiber Optic Transceiver Part of the Avago Technologies METRAK family

RECEIVER
DOUT+
DOUT-
CAC
DIN+
RDL
ZIN
CAC
DIN-
AC COUPLING CAPACITORS (DC BLOCKING CAPACITORS) SHOULD BE USED TO
CONNECT DATA OUTPUTS TO THE LOAD. THE DIFFERENTIAL DATA PAIR SHOULD BE
TERMINATED WITH A DIFFERENTIAL LOAD, RDL, OF 100 Ω USING EITHER AN INTERNAL
LOAD, ZIN, AS SHOWN ABOVE, OR AN EXTERNAL LOAD, IF NECESSARY.
Figure 9 - Recommended AC coupling and data signal termination
DIN+
+
∆VDIN
-
DIN-
TRANSMITTER
RECEIVER
DOUT+
+
∆VDOUT
-
D∆OUT-
VDI/O REFERS TO EITHER VDIN
OR VDOUT AS APPROPRIATE.
Figure 10 - Differential signals
VDI/O+
∆VDI/OH
∆VDI/OL
VDI/O-
∆VDI/OH
∆VDI/OL
+
∆VDI/O P-P
-
D_IN+
Z_IN
D_IN-
V_CCT
50 Ω
50 Ω
V_BIAS
(NONIMAL 1.9V)
V
EE
50 Ω
50 Ω
V_EE
Figure 11 - Transmitter data input equivalent circuit
Figure 12 - Receiver data output equivalent
circuit.
V_CC
DOUT+
DOUT-
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