ISL35411 Datasheet, PDF (1/11 Pages) Intersil Corporation – Quad Driver

Quad Driver
ISL35411
The ISL35411 is a quad de-emphasis driver with
extended functionality for advanced protocols operating
with line rates up to 11.1 Gbps such as InfiniBand (QDR)
and 40G Ethernet (40GBASE-CR4/SR4). The ISL35411
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 ISL36411 receive-side
equalizer, ISL35411 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 ISL35411
enables per channel throughputs of 10Gbps to 11.1Gbps.
The ISL35411 uses current mode logic (CML)
input/output and is packaged in a 4mmx7mm 46 lead
QFN.
Typical Application Circuit
Features
• Supports four channels with data rates up to
11.1Gbps
• Low power (90mW per channel)
• Low latency
• Adjustable output de-emphasis
• Four drivers in a 4mmx7mm QFN package for
straight route-through architecture & simplified
routing
• Supports 64b/66b encoded data – long run lengths
• Line silence preservation
• 1.2V supply voltage
• TX_Disable
Applications
• QSFP active copper cable modules
• InfiniBand (QDR)
• 40G Ethernet (40GBase-CR4/SR4)
• 100G Ethernet (100GBase-CR10/SR10)
• High-speed active cable assemblies
• High-speed printed circuit board (PCB) traces
Benefits
• Thinner gauge cable
• Extends cable reach greater than 3x
• Improved BER
Tx1[P,N]
Tx2[P,N]
Tx3[P,N]
Tx4[P,N]
1.2V
10nF
0.1µF
TDSBL
IN1[P,N]
100pF
DE VDD
OUT1[P,N]
0.1µF
IN2[P,N] OUT2[P,N]
ISL35411
0.1µF
IN3[P,N] OUT3[P,N]
0.1µF
IN4[P,N] OUT4[P,N]
DT
1.2V
Active Copper Cable Assembly
8-Pair Differential 100OΩ
Twin-Axial Cable
= 10m 28AWG
1.2V
10nF
100pF
VDD CP LOSB
0.1µF
IN1[P,N] OUT1[P,N]
0.1µF
0.1µF
0.1µF
IN2[P,N] OUT2[P,N]
ISL36411
0.1µF
IN3[P,N]
0.1µF
IN4[P,N]
1.2V
DT
0.1µF
OUT3[P,N]
0.1µF
OUT4[P,N]
Host Channel
Adapter
Rx1[P,N]
Rx2[P,N]
Rx3[P,N]
Rx4[P,N]
Fabric Switch
Connector Paddle Card
Connector Paddle Card
March 25, 2010
FN6971.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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