CLINK3V28BT-85 National Semiconductor, CLINK3V28BT-85 Datasheet - Page 9

• Manufacturer Part Number: CLINK3V28BT-85
• Description: KIT EVAL 28BIT DS90CR287/288A
• Manufacturer: National Semiconductor

Specifications of CLINK3V28BT-85

• Main Purpose: Interface, Serializer, Deserializer (SERDES)
• Utilized Ic / Part: DS90CR287, DS90CR288A
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

Tx Board Options: 50 Ohm Termination for TxIN
On the Tx demo board, the 29 inputs have an option for 50 Ohm terminations.
There are 0402 pads for this purpose. One side is connected to the signal line and
the other side is tied to ground. These pads are unpopulated from the factory but
are provided if the user needs to install a 50 Ohm termination. R1 TO R28 are
associated with the Tx data input lines. R29 is associated with CLKIN. Some test
equipment may require a 50 Ohm load.
Mapping of Transmitter Inputs for the Optional Termination Resistors is shown
below:
Tx Pin
Names
TxIN0
TxIN1
TxIN2
TxIN3
TxIN4
TxIN5
TxIN6
TxIN7
TxIN8
TxIN9
TxIN10
TxIN11
TxIN12
TxIN13
TxIN14
TxIN15
TxIN16
TxIN17
TxIN18
TxIN19
TxIN20
TxIN21
TxIN22
TxIN23
TxIN24
TxIN25
TxIN26
TxIN27
TxCLKIN
Tx Pin
Number
51
52
54
55
56
2
3
4
6
7
8
10
11
12
14
15
16
18
19
20
22
23
24
25
27
28
30
50
31
Termination
Resistor
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
National Semiconductor Corporation
Channel Link Evaluation Kit User Manual
Interface Products
50 Ohm Termination
LIT# CLINK3V28BT-85-UM
Rev 2.1
Date: 10/12/2005
Page 9 of 28
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