DS32EV400_08 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – Programmable Quad Equalizer

April 18, 2008
DS32EV400
Programmable Quad Equalizer
General Description
The DS32EV400 programmable quad equalizer provides
compensation for transmission medium losses and reduces
the medium-induced deterministic jitter for four NRZ data
channels. The DS32EV400 is optimized for operation up to
3.2 Gbps for both cables and FR4 traces. Each equalizer
channel has eight levels of input equalization that can be pro-
grammed by three control pins, or individually through a Serial
Management Bus (SMBus) interface.
The equalizer supports both AC and DC-coupled data paths
for long run length data patterns such as PRBS-31, and bal-
anced codes such as 8b/10b. The device uses differential
current-mode logic (CML) inputs and outputs. The
DS32EV400 is available in a 7 mm x 7 mm 48-pin leadless
LLP package. Power is supplied from either a 2.5V or 3.3V
supply.
Features
■ ^{Equalizes up to 14 dB loss at 3.2 Gbps}
■ ^{8 levels of programmable equalization}
■ ^{Settable through control pins or SMBus interface}
■ ^{Operates up to 3.2 Gbps with 40” FR4 traces}
■ ^{0.12 UI residual deterministic jitter at 3.2 Gbps with 40”}
FR4 traces
■ ^{Single 2.5V or 3.3V power supply}
■ ^{Signal Detect for individual channels}
■ ^{Standby mode for individual channels}
■ ^{Supports AC or DC-Coupling with wide input common-}
mode
■ ^{Low power consumption: 375 mW Typ at 2.5V}
■ ^{Small 7 mm x 7 mm 48-pin LLP package}
■ ^{9 kV HBM ESD Rating}
■ ^{-40 to 85°C operating temperature range}
Simplified Application Diagram
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