CLINK3V48BT-133 National Semiconductor, CLINK3V48BT-133 Datasheet - Page 4

• 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

The National Semiconductor CLINK3V48BT-133 evaluation kit demonstrates the
performance of the DS90CR485/485 48-bit, 66 – 133 MHz Channel Link SerDes
chipset.
The printed circuit board (PCB) is optimized for the high-speed operation. The
LVCMOS/LVTTL parallel bus trace impedance is 50 Ohms and LVDS differential
impedance is 100 Ohms. Both LVCMOS/LVTTL and LVDS buses have matched
trace lengths for low signal-to-signal skew.
The transmitter serializes 24 LVCMOS/LVTTL double edge inputs (48 bits data
latched in per clock cycle) onto 8 Low Voltage Differential Signaling (LVDS)
streams. A phase-locked clock is also transmitted in parallel with the data
streams over a 9
plus clock back to 48 LVCMOS/LVTTL data bits plus clock.
This evaluation kit can be used to test and verify the following:
Evaluation Board Features
Contents of the Evaluation Kit
DS90CR485/486 Evaluation Kit User Manual
Rev. 1.01
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Data serialization and deserialization over backplanes or cable
Bit error rate testing (BERT)
Eye pattern signal quality
Transmitter adjustable LVDS output pre-emphasis
DC balance mode
Transmitter cable detector
Cable deskew function
Interoperability with National’s 112 MHz DS90CR481/482/482/484 chips
(112 MHz CLINK3V48BT-112 evaluation kit required)
National Semiconductor’s 48-bit, 66 – 133 MHz DS90CR485/486 Channel
Link serializer/deserializer
On-board selectable 66MHz and 133MHz oscillators
Provision for external clock source
Configuration controls for pre-emphasis, DC balance, cable deskew,
power-down, internal pattern generator and pattern select
3M MDR cable and connectors
CLINK3V485/486 PCB with the DS90CR485VS Transmitter and the
DS90CR486VS Receiver
One 2-meter 3M MDR LVDS cable interface
Evaluation Kit Documentation (this manual)
DS90CR485/486 Datasheet
th
LVDS pair. The receiver converts the 8 LVDS data streams
Introduction
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