CLINK3V48BT-133 National Semiconductor, CLINK3V48BT-133 Datasheet - Page 26

• Manufacturer Part Number: CLINK3V48BT-133
• Description: BOARD EVAL FOR DS90CR485, 486
• Manufacturer: National Semiconductor

Specifications of CLINK3V48BT-133

• Main Purpose: Interface, SerDes (Serializer / De-Serializer)
• Embedded: No
• Utilized Ic / Part: DS90CR485, DS90CR486
• Primary Attributes: Serializes 48 LVCMOS/LVTTL to 8 LVDS, 66 ~ 133 MHz
• Secondary Attributes: Transmits over 2 Meter 3M MDR LVDS Cable
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Receiver LVDS Input Termination
The DS90CR486 Receiver has nine total LVDS input pairs (eight pairs of data
and one pair of clock). Impedance and lengths are matched on all nine pairs and
between each pair to reduce reflection and board skew. See MDR Connector
under Connector Mapping Tables on page 22 for detail on receiver’s inputs
signal mapping.
A 100-Ohm differential termination resistor is provided on each input pair (R92 –
R100) near the receiver’s device pins to generate proper differential voltage and
minimize stub length. See below figure for simply circuit schematic and mapping
for resistor and its corresponding signal. LVDS termination is required in all
applications.
DS90CR485/486 Evaluation Kit User Manual
Rev. 1.01
99
98
97
96
95
94
92
91
90
89
87
86
85
84
83
82
80
79
Device Pin #
100ohm
DS90CR486
NAME
RxCLKM
RxCLKP
RxINM0
RxINM1
RxINM2
RxINM3
RxINM4
RxINM5
RxINM6
RxINM7
RxINP0
RxINP1
RxINP2
RxINP3
RxINP4
RxINP5
RxINP6
RxINP7
Termination
Resistor
R100
R100
R92
R92
R93
R93
R94
R94
R95
R95
R96
R96
R97
R97
R98
R98
R99
R99
26 of 32
Parallel Output
Load