VDD

RX6P

RX6N

ADDR0

ADDR1

SDC

(1)

READ_EN_N

ALL_DONE_N

SDA

(1)

TX6P

TX6N

.

.

.

.

.

.

GND

.

.

.

(1) SMBus signals need to be pulled up elsewhere in the system.

Float for SMBus Slave

mode, or connect to next

GHYLFH¶V 5($'_EN_N for

SMBus Master mode

VDD

1 F

(2x)

0.1 F

(4x)

SMBus Slave

mode

SMBus

Slave mode

2.5V

.

.

.

EN_SMB

Address straps

(pull-up, pull-down, or float)

1 NŸ

To system SMBus

RX7P

RX7N

TX7P

TX7N

X

RX0P

RX0N

TX0P

TX0N

RX1P

RX1N

TX1P

TX1N

X

.

.

.

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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.

DS280MB810

SNLS522 – SEPTEMBER 2016

DS280MB810 Low Power 28 Gbps 8 Channel Linear Repeater with Crosspoint

1

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