CLINK3V28BT-85 National Semiconductor, CLINK3V28BT-85 Datasheet - Page 14

• 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: -

Rx Optional: Series Termination for RxOut
On the Rx demo board, there are 29 outputs that have an 0402 pad in series (which
are shorted out). These pads are unpopulated from the factory but are provided if
the user needs to install a 450 Ohm series resistors. This is required if directly
connecting to 50 Ohm inputs on a scope. To use this option the user must cut the
signal line between the pads before installing the 450 Ohm series resistors. R1 to
R28 are associated with the DATA output lines. R29 is associated with CLKOUT.
The total load presented to the receiver output is 500 Ohms (450 + 50). The
waveform on the scope is 1/10 of the signal due to the resulting voltage divider (50 /
(450 + 50)).
Optional Series Termination Resistor mapping is shown below:
Rx Pin Names
RxOUT0
RxOUT1
RxOUT2
RxOUT3
RxOUT4
RxOUT5
RxOUT6
RxOUT7
RxOUT8
RxOUT9
RxOUT10
RxOUT11
RxOUT12
RxOUT13
RxOUT14
RxOUT15
RxOUT16
RxOUT17
RxOUT18
RxOUT19
RxOUT20
RxOUT21
RxOUT22
RxOUT23
RxOUT24
RxOUT25
RxOUT26
RxOUT27
RxCLKOUT
Rx Pin
Number
27
29
30
32
33
34
35
37
38
39
41
42
43
45
46
47
49
50
51
53
54
55
1
2
3
5
6
7
26
Series
Termination
Resistor
R28
R27
R26
R25
R24
R23
R22
R21
R20
R19
R18
R17
R16
R15
R14
R13
R12
R11
R10
R9
R8
R7
R6
R5
R4
R3
R2
R1
R29
National Semiconductor Corporation
Channel Link Evaluation Kit User Manual
Interface Products
RX
LIT# CLINK3V28BT-85-UM
Rev 2.1
Date: 10/12/2005
Page 14 of 28
Series Termination
(Optional)