DS320PR822
SNLS714 – SEPTEMBER 2022
DS320PR822 Linear Redriver for PCIe 5.0, CXL 1.1 With Four 2x2 Crosspoint Mux
1 Features
3 Description
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Linear redriver supporting PCIe 5.0, CXL 2.0, UPI
2.0 up to 32 Gbps
Supports most ac coupled interfaces including DP,
SAS, SATA, XFI
Provides four 2x2 Crosspoint mux function
CTLE boosts up to 22 dB at 16 GHz
Ultra-low latency of 100 ps
Low additive random jitter of 75 fs for PRBS data
Excellent return loss of −10 dB at 16 GHz
Single 3.3 V supply
Internal voltage regulator provides immunity to
supply noise
Low active power of 160 mW per channel
No heat sink required
Pin-strap, SMBus or EEPROM programming
Automatic receiver detection for PCIe use cases
Protocol agnostic linear redriver allows seamless
support for PCIe link training
Support for x2, x4, x8, x16, x24 bus width with one
or multiple DS320PR822
The DS320PR822 is a low-power high-performance
linear repeater or redriver designed to support PCIe
5.0, CXL 2.0, UPI 2.0, and other interfaces up to
32 Gbps. The DS320PR822 provides four 2x2 cross-
point mux functionality.
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The DS320PR822 receivers deploy continuous time
linear equalizers (CTLE) to provide a programmable
high-frequency boost. The equalizer can open an
input eye that is completely closed due to inter-
symbol interference (ISI) induced by an interconnect
medium, such as PCB traces. The CTLE receiver
is followed by a linear output driver. The linear data-
paths of DS320PR822 preserve transmit preset signal
characteristics. The linear redriver becomes part of
the passive channel that as a whole get link trained
for best transmit and receive equalization settings.
This transparency in the link training protocol results
in best electrical link and lowest possible latency.
Low channel-channel cross-talk, low additive jitter
and excellent return loss makes the device almost
a passive element in the link, but with its useful
equalization. The data-path of the device uses an
internally regulated power rail that provides high
immunity to any supply noise on the board.
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Temperature range of –40 °C to 85 °C
5.5 mm × 10 mm, 64 pin WQFN package
2 Applications
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Rack server, microserver, and tower server
High performance computing
Hardware accelerator
Network attached storage
Storage area network (SAN) and host bus adapter
(HBA) card
The device also has low AC and DC gain variation
providing consistent equalization in high volume
platform deployment.
Package Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
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Network interface card (NIC)
Desktop PC or motherboard
DS320PR822
WQFN (NJX, 64) 5.50 mm × 10.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
x16
x16
TX
RX
RX
TX
PCIe Card-1 (x16)
Connector-1
CPU-1
DS320PR822
Quad 2x2 x-point
x16
x16
x16
x16
DS320PR822
Quad 2x2 x-point
RX
TX
PCIe Card-2 (x16)
Connector-2
TX
RX
CPU-2
x16
x16
Typical Application
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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