DS64BR401 Datasheet, PDF (1/30 Pages) National Semiconductor (TI) – Quad Bi-Directional Transceiver with Equalization and De-Emphasis

DS64BR401
June 25, 2009
Quad Bi-Directional Transceiver with Equalization and
De-Emphasis
General Description
The DS64BR401 is a quad lane bi-directional signal condi-
tioning transceiver suitable for 6.0/3.0/1.5 Gbps SATA/SAS
and other high-speed bus applications with data rates up to
6.4 Gbps. The device performs both receive equalization and
transmit de-emphasis on each of its 8 channels to compen-
sate for channel loss, allowing maximum flexibility of physical
placement within a system. The receiver's continuous time
linear equalizer (CTLE) provides a boost of up to +33 dB at 3
GHz and is capable of opening an input eye that is completely
closed due to inter-symbol interference (ISI) induced by the
interconnect medium. The transmitter features a pro-
grammable output de-emphasis driver and allows amplitude
voltage levels to be selected from 600 mVp-p to 1200 mVp-p
to suit multiple application scenarios. This Low Power Differ-
ential Signaling (LPDS) output driver is a power efficient
implementation that maintains compatibility with AC coupled
CML receiver. The programmable settings can be applied via
pin settings or SMBus interface.
To enable seamless upgrade from SAS/SATA 3.0 Gbps to 6.0
Gbps data rates without compromising physical reach,
DS64BR401 automatically detects the incoming data rate and
selects the optimal de-emphasis pulse width. The device de-
tects the out-of-band (OOB) idle and active signals of the
SAS/SATA specification and passes through with minimum
signal distortion.
With a typical power consumption of 200 mW/lane (100 mW/
channel) at 6.4 Gbps, and control to turn-off unused channels,
the DS64BR401 is part of National's PowerWise family of en-
ergy efficient devices.
Features
■ ^{Quad lane bi-directional transceiver up to 6.4 Gbps rate}
■ ^{Signal conditioning on input and output for extended reach}
■ ^{Adjustable receive equalization up to +33 dB gain}
■ ^{Adjustable transmit de-emphasis up to −12 dB}
■ ^{Adjustable transmit VOD (600 mVp-p to 1200 mVp-p)}
■ ^{<0.25 UI of residual DJ at 6.4 Gbps with 40” FR4 trace}
■ ^{Automatic de-emphasis scaling based on rate detect}
■ ^{SATA/SAS: OOB signal pass-through,}
<3 ns (typ) envelope distortion
■ ^{Adjustable electrical IDLE detect threshold}
■ ^{Low power (100 mW/channel), per-channel power down}
■ ^{Programmable via pin selection or SMBus interface}
■ ^{Single supply operation at 2.5V ±5%}
■ ^{>6 kV HBM ESD Rating}
■ ^{3.3V LVCMOS input tolerant for SMBus interface}
■ ^{High speed signal flow–thru pinout package: 54-pin LLP}
(10 mm x 5.5 mm)
Applications
■ ^{SATA (1.5, 3.0 and 6 Gbps)}
■ ^{SAS (1.5, 3.0 and 6 Gbps)}
■ ^{XAUI (3.125 Gbps), RXAUI (6.25 Gbps)}
■ ^{sRIO – Serial Rapid I/O}
■ ^{Fibre Channel (4.25 Gbps)}
■ ^{10GBase-CX4, InfiniBand 4x (SDR & DDR)}
■ ^{QSFP active copper cable modules}
■ ^{High-speed active cable and FR-4 backplane traces}
Typical Cable Application
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