VDD

RX0P

RX0N

RX1P

RX1N

CAL_CLK_IN

CAL_CLK_OUT

ADDR0

ADDR1

NC_TEST

SDC

(1)

READ_EN_N

ALL_DONE_N

SDA

(1)

INT_N

TX0P

TX0N

TX1P

TX1N

GND

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

25 MHz

7R QH[W GHYLFH¶V

CAL_CLK_IN

Float for SMBus Slave

mode, or connect to next

GHYLFH¶V 5($'_EN_N for

SMBus Master mode

2.5V or

3.3V

To other open-drain

interrupt pins

VDD

1 F

(2x)

0.1 F

(4x)

SMBus Slave

mode

SMBus

Slave mode

2.5V

RX

EN_SMB

Address straps

(pull-up, pull-

down, or float)

1 NŸ

To system

SMBus

CDR

TX

RX

CDR

TX

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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.

DS250DF210

SNLS560 – FEBRUARY 2017

DS250DF210 25-Gbps Multi-Rate 2-Channel Retimer

1

1 Features

1

•

Dual-Channel Multi-Rate Retimer With Integrated

Signal Conditioning

•

All Channels Lock Independently From 20.6 to

25.8 Gbps (Including Sub-Rates Such as 10.3125

Gbps, 12.5 Gbps, and More)

•

Ultra-Low Latency: <500 ps Typical for 25.78125-

Gbps Data Rate

•

Single Power Supply, No Low-Jitter Reference

Clock Required, and Minimal Supply Decoupling

to Reduce Board Routing Complexity and BOM

Cost

•

Adaptive Continuous Time Linear Equalizer

(CTLE)

•

Adaptive Decision Feedback Equalizer (DFE)

•

Integrated 2 x 2 Cross Point

•

Low-Jitter Transmitter With 3-Tap FIR Filter

•

Combined Equalization Supporting 35+ dB

Channel Loss at 12.9 GHz

•

Adjustable Transmit Amplitude: 205 mVppd to

1225 mVppd (Typical)

•

On-Chip Eye Opening Monitor (EOM), PRBS

Pattern Checker and Generator

•

Small 6-mm × 6-mm BGA Package With Easy

Flow-Through Routing

2 Applications

•

Jitter Cleaning for Front-Port Optical

•

Active Cable Assemblies

•

Backplane and Mid-Plane Reach Extension

•

IEEE802.3bj 100GbE, Infiniband EDR, and OIF-

CEI-25G-LR/MR/SR/VSR Electrical Interfaces

•

SFP28, QSFP28, CFP2/CFP4, CDFP

3 Description

The DS250DF210 device is a two-channel, multi-rate

retimer with integrated signal conditioning. It is used

to extend the reach and robustness of long, lossy,

crosstalk-impaired,

high-speed

serial

links

while

Each channel of the DS250DF210 independently

locks to serial data rates in a continuous range from

20.6 Gbps to 25.8 Gbps or to any supported sub-rate

(÷2 and ÷4), including key data rates such as 10.3125

Gbps and 12.5 Gbps, which allows the DS250DF210

to support individual lane Forward Error Correction

(FEC) pass-through.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

DS250DF210

ABM (101)

6.00 mm × 6.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic