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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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11.1Gb/s Driver

ISL35111

The ISL35111 is a de-emphasis driver with extended

functionality for advanced protocols operating with line

rates up to 11.1Gbps such as 10G Ethernet. The

ISL35111 is a high-speed driver/limiting amplifier with

built-in de-emphasis to drive twin-axial copper cables

and compensate for the frequency dependent

attenuation of PCB traces such as the SFI channel in the

10G SFP+ specification (SFF-8431).

Used in conjunction with Intersil’s ISL36111 receive-side

equalizer, ISL35111 enables active copper cable

assemblies that support 10G serial data transmission

over >15m of twin-axial copper cables.

Operating on a single 1.2V power supply, the ISL35111

enables channel throughputs of 10Gbps to 11.1Gbps

while supporting lower data rates including 8.5, 6.25, 5,

4.25, 3.125, and 2.5Gb/s. The QL111VTx uses current

mode logic (CML) input/output and is packaged in a

3mmx3mm 16 lead QFN.

Features

• Supports data rates up to 11.1Gbps

•Low power (85mW typical)

• Low latency (<500ps)

• Adjustable output de-emphasis

• Single channel driver in a 3mmx3mm QFN package

for straight route-through architecture and simplified

routing

• Supports 64b/66b encoded data – long run lengths

• Line silence preservation

• 1.2V supply voltage

• TX_Disable and TX_LOS

Applications

• Active copper cable modules (SFP+, QSFP, CXP, etc)

• Optical transceiver modules (SFP+, QSFP, CXP, etc)

•10G Ethernet

• 40G/100G Ethernet

•Fibre Channel

• High-speed active cable assemblies

• High-speed printed circuit board (PCB) traces

Benefits

• Thinner gauge cable

• Extends cable reach greater than 3x

•Improved BER

Typical Application Diagram

QLx111VRx

1.2V

LOS

CP-A

Vdd

0.1mF

IN [P]

OUT [P]

DT

CP-B

IN [N]

OUT [N]

0.1mF

0.1mF

IN [N]

Vdd

OUT [N]

OUT [P]

IN [P]

DT

LOS

DE-B

0.1mF

QLx111VTx

DE-A

1.2V

0.1mF

0.1mF

TDSBL GND

GND

FIGURE 1. TYPICAL CABLE APPLICATION DIAGRAM

ISL35111

ISL36111

January 27, 2010

FN6975.1