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Date: 30th June 09
Low-Jitter four-lane, bidirectional
PCIe and SATA transceivers for backplane extension
National Semiconductor has introduced new quad bidirectional
transceivers for PCIe and SATA bus standards. The DS50PCI401
is PCI-SIG-approved to the PCI Express (PCIe) Gen1 (2.5
Gbps) and Gen2 (5 Gbps) specifications, while the DS64BR401
supports both 3 Gbps and 6 Gbps SATA/SAS specifications,
along with other high-speed signaling standards such as
XAUI, serial Rapid IO (sRIO) and Fibre Channel.
The DS50PCI401 four-lane, bidirectional PCIe transceiver
provides both adjustable receive equalization and transmit
de-emphasis. This device consumes a low power of 190 mW
typical per lane and supports a selectable low-power state
and power-down of individual lanes. The DS50PCI401 compensates
for transmission medium losses, reducing deterministic jitter
on eight transmission channels. It equalizes more than 10
meters of PCIe cable or 40 inches of FR-4 printed circuit
board (PCB) at transmission rates up to 5 Gbps. At seven
meters of PCIe cable equalization, the DS50PCI401 achieves
less than 0.10 unit intervals (UI) of residual jitter at
the equalizer output. This extended reach enables the use
of lower-cost, thinner (higher gauge) PCIe cable.
The DS50PCI401 offers a unique automatic rate detect feature
that adjusts the output signal conditioning to achieve the
maximum benefit at Gen1 and Gen2 data rates. In addition,
the DS50PCI401 supports PCIe specific out-of-band (OOB)
signaling such as transmit idle, receive detect and beacon
signal pass through.
For further details, visit www.national.com/pf/DS/DS50PCI401.html.
The DS64BR401 four-lane, bidirectional SATA/SAS transceiver
provides both adjustable receive equalization and transmit
de-emphasis, and has undergone extensive interoperability
testing with third-party host and target devices. It equalizes
up to 10 meters of SATA/SAS cable or 40 inches of FR-4 printed
circuit board (PCB) at transmission rates up to 6.4 Gbps,
with less than 0.25 UI of residual jitter at the equalizer
output.
With a typical power consumption of 200 mW typical per
lane, the DS64BR401 supports OOB signaling with approximately
3 ns typical of envelope distortion, ensuring compatibility
with the SATA/SAS specification. It also offers an adjustable
voltage output differential of 600 mV peak-to-peak (p-p)
to 1200 mV p-p. The DS64BR401 provides automatic power management
on an individual lane basis via an SMBus interface.
For further details on DS64BR401 visit www.national.com/pf/DS/DS64BR401.html.
Pricing and Availability
Available now and offered in a 10 mm by 5.5 mm, 54-pin leadless
LLP package, the DS50PCI401 PCIe transceiver is priced at
$9.95 each and the DS64BR401 SATA/SAS transceiver is priced
at $11.25 each. All prices are in 1,000-unit quantities.
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