MAX9205 Maxim, MAX9205 Datasheet - Page 10

• Manufacturer Part Number: MAX9205
• Description: The MAX9205/MAX9207 serializers transform 10-bit-wide parallel LVCMOS/LVTTL data into a serial high-speed bus low-voltage differential signaling (LVDS) data stream
• Manufacturer: Maxim

10-Bit Bus LVDS Serializers
The serializers can operate in a variety of topologies.
Examples of double-terminated point-to-point, mul-
tidrop, point-to-point broadcast, and multipoint topolo-
gies are shown in Figures 11 through 14. Use 1%
surface-mount termination resistors.
A point-to-point connection terminated at each end in
the characteristic impedance of the cable or PCB
traces is shown in Figure 11. The total load seen by the
serializer is 50Ω. The double termination typically
Figure 11. Double-Terminated Point-to-Point
Figure 12. Multidrop
10
______________________________________________________________________________________
MAX9205
MAX9207
ASIC
PARALLEL
DATA IN
MAX9205
MAX9207
ASIC
MAX9206
MAX9208
Topologies
100Ω
SERIALIZED DATA
ASIC
MAX9206
MAX9208
reduces reflections compared to a single 100Ω termi-
nation. A single 100Ω termination at the deserializer
input is feasible and will make the differential signal
swing larger.
A serializer located at one end of a backplane bus dri-
ving multiple deserializers in a multidrop configuration
is shown in Figure 12. A 54Ω resistor at the far end ter-
minates the bus. This topology allows “broadcast” of
data with a minimum of interconnect.
100Ω
ASIC
MAX9206
MAX9208
MAX9206
MAX9208
PARALLEL
DATA OUT
ASIC
MAX9206
MAX9208
54Ω