DS92LX2121SQE National Semiconductor, DS92LX2121SQE Datasheet - Page 33

• Manufacturer Part Number: DS92LX2121SQE
• Description: SERDES, 10-50MHZ, 40LLP
• Manufacturer: National Semiconductor

Specifications of DS92LX2121SQE

• Data Rate: 1.05Gbps
• No. Of Inputs: 21
• No. Of Outputs: 1
• Supply Voltage Range: 1.71V To 1.89V
• Driver Case Style: LLP
• No. Of Pins: 40
• Base Number: 2121
• Operating Temperature Range: -40°C To +85°C
• Serdes Function: Serializer
• Ic Input Type: LVCMOS
• Ic Output Type: LVCMOS
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Applications Information
AC COUPLING
The SER/DES supports only AC-coupled interconnects
through an integrated DC balanced decoding scheme. Exter-
For high-speed Channel Link III transmissions, the smallest
available package should be used for the AC coupling ca-
pacitor. This will help minimize degradation of signal quality
due to package parasitics. The I/O’s require a 0.1 μF AC cou-
pling capacitors to the line.
FIGURE 30. AC-Coupled Application
33
nal AC coupling capacitors must be placed in series in the
Channel Link III signal path as illustrated in Figure 34.
TYPICAL APPLICATION CONNECTION
Figure 31
Serializer.
shows a typical connection of the DS92LX2121
30125138
www.national.com