HFBR-772BZ
DATA OUT (+)
DATA OUT (–)
R
50 Ω
C = 100 nF
C = 100 nF
R
100 Ω
R
50 Ω
HFBR-782BZ
ASIC
D
OUT
(+)
Unused receiver
channel outputs
must be terminated
C = 100 nF
RDL
100 Ω
D
OUT
(–)
C = 100 nF
NOTE:
AC coupling capacitors should be used to connect data outputs to data inputs between
the HFBR-772BZ, HFBR-782BZ, and host board ICs (eg ASIC) with either 50 Ω single
ended or 100 Ω differential terminations as shown. The capacitors' value can be reduced
from 100 nF (0603 size) if the data rate and run length are limited.
Figure 7. Recommended ac coupling and data signal termination.
V
D
+
DI/O+
IN+
∆V
TRANSMITTER
DIN
∆V
∆V
DI/OL
DI/OH
–
D
IN–
V
DI/O–
D
D
OUT+
+
∆V
RECEIVER
DOUT
∆V
∆V
DI/OH
DI/OL
+
–
∆V
DI/O P-P
–
OUT–
V
REFERS TO
DI/O
EITHER V
OR V
DIN
AS APPROPRIATE
DOUT
Figure 8. Differential signals.
16
AVAGO [ AVAGO TECHNOLOGIES LIMITED ]
