DS280MB810 Datasheet, PDF (1/13 Pages) Texas Instruments – Low Power 28 Gbps 8 Channel Linear Repeater

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DS280MB810
SNLS522 – SEPTEMBER 2016
DS280MB810 Low Power 28 Gbps 8 Channel Linear Repeater with Crosspoint
1 Features
•1 Octal-Channel Multi-Protocol Linear Equalizer
Supporting up to 28 Gbaud Interfaces
• Integrated 2x2 Crosspoint with Pin or Register
Control for Mux, Fanout, and Signal Crossing
Applications
• Low Power Consumption: 93 mW / Channel
(Typical)
• No Heat Sink Required
• Linear Equalization for Seamless Support of Link
Training, Auto-Negotiation, and FEC Pass-
Through
• Extends Channel Reach by 17dB+ Beyond
Normal ASIC-to-ASIC Capability at 14 GHz
• Ultra-Low Latency: 100 ps (Typical)
• Low Additive Random Jitter
• Small 8 mm x 13 mm BGA Package with
Integrated RX AC Coupling Capacitors for Easy
Flow-Through Routing
• Unique Pinout Allows Routing High-Speed Signals
Underneath the Package
• Pin-Compatible Retimer with Crosspoint Available
• Single 2.5-V ±5% Power Supply
• –40°C to +85°C Operating Temperature Range
2 Applications
• Backplane/Mid-Plane Signal Distribution Plus
Equalization
• Mux/De-Mux for Failover Redundancy
• Front-Port Eye Opener Plus Signal Distribution for
Switching Between Ports
3 Description
The DS280MB810 is an extremely low-power, high-
performance eight-channel linear equalizer supporting
multi-rate, multi-protocol interfaces up to 28 Gbaud. It
is used to extend the reach and improve the
robustness of high-speed serial links for backplane,
front-port, and chip-to-chip applications.
The DS280MB810 includes a full 2x2 crosspoint
switch between each pair of adjacent channels which
enables 2-to-1 multiplexing and 1-to-2 de-multiplexing
applications for failover redundancy, as well as signal
cross-over to aid PCB routing. The crosspoint can be
controlled through pins or the SMBus register
interface.
The linear nature of the DS280MB810’s equalization
preserves the transmit signal characteristics, thereby
allowing the host and link partner ASICs to freely
negotiate transmit equalizer coefficients (100G-
CR4/KR4). This transparency to the link training
protocol facilitates system-level interoperability with
minimal effect on the latency. The DS280MB810
supports two-level and four-level pulse amplitude
modulation (PAM) for symbol rates up to 28 Gbaud
and peak signal amplitude within the linear operating
range.
Each channel operates independently, and every
channel can be configured uniquely. In most
application scenarios, the same configuration can be
used regardless of data rate.
The DS280MB810's small package dimensions,
optimized high-speed signal escape, and the pin-
compatible Retimer portfolio make the DS280MB810
ideal for high-density backplane applications.
Simplified equalization control, low power
consumption, and ultra-low additive jitter make it
suitable for front-port interfaces such as 100G-
SR4/LR4/CR4. The small 8-mm x 13-mm footprint
easily fits behind numerous standard front-port
connectors like QSFP, SFP, CFP, and CDFP without
the need for a heat sink.
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DS280MB810
nFBGA(135)
8.0 mm x 13.0 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
RX0P
RX0N
X
RX1P
RX1N
...
...
...
RX6P
RX6N
X
VDD
SMBus
Slave mode ^{1 NŸ}
RX7P
RX7N
EN_SMB
TX0P
TX0N
TX1P
TX1N
...
...
TX6P
TX6N
TX7P
TX7N
SDA⁽¹⁾
SDC⁽¹⁾
ADDR0
ADDR1
To system SMBus
Address straps
(pull-up, pull-down, or float)
SMBus Slave
mode
2.5V
1F
0.1 F
(2x)
(4x)
READ_EN_N
VDD
ALL_DONE_N
GND
Float for SMBus Slave
mode, or connect to next
GHYLFH¶V 5($'_EN_N for
SMBus Master mode
(1) SMBus signals need to be pulled up elsewhere in the system.
1
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.