DS125RT410 Retimer Datasheet

DS125RT410 Datasheet, PDF, Equivalent


Part Number

DS125RT410

Description

Low-Power Multi-Rate Quad Channel Retimer

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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DS125RT410
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DS125RT410
SNLS459A – APRIL 2013 – REVISED OCTOBER 2015
DS125RT410 Low-Power Multi-Rate Quad Channel Retimer
1 Features
1 Each Channel Independently Locks to Data Rates
From 9.8 to 12.5 Gbps and Submultiples
• Fast Lock Operation Based on Protocol-Select
Mode
• Low Latency (300 ps)
• Adaptive Equalization up to 34-dB Boost at 5 GHz
• Adjustable Transmit VOD: 600 to 1300 mVp-p
• Adjustable Transmit De-emphasis to –15 dB
• Typical Power Dissipation (EQ+CDR+DE):
150 mW/Channel
• Programmable Output Polarity Inversion
• Input Signal Detection, CDR Lock Detection and
Indicator
• On-Chip Eye Monitor (EOM), PRBS Generator
• Single 2.5-V ± 5% Power Supply
• SMBus and EEPROM Configuration Modes
• Operating Temperature Range of –40 to 85°C
• WQFN 48-Pin 7-mm × 7-mm Package
• Easy Pin Compatible Upgrade Between Repeater
and Retimers
– DS100RT410 (EQ+CDR+DE): 10.3125 Gbps
– DS100DF410 (EQ+DFE+CDR+DE):
10.3125 Gbps
– DS110RT410 (EQ+CDR+DE): 8.5 to
11.3 Gbps
– DS110DF410 (EQ+DFE+CDR+DE): 8.5 to
11.3 Gbps
– DS125RT410 (EQ+CDR+DE): 9.8 to
12.5 Gbps
– DS125DF410 (EQ+DFE+CDR+DE):
9.8 to 12.5 Gbps
– DS100BR410 (EQ+DE): Up to 10.3125 Gbps
2 Applications
• Front Port SFF 8431 (SFP+) Optical and Direct
Attach Copper
• Backplane Reach Extension, Data Retimer
• Ethernet: 10 GbE, 1 GbE
• CPRI: Line Bit Rate Options 3–7
• Interlaken: All Lane Bit Rates
• InfiniBand
• Other Propriety Data Rates up to 12.5 Gbps
3 Description
The DS125RT410 is a four-channel retimer with
integrated signal conditioning. The device includes a
fully adaptive continuous-time linear equalizer
(CTLE), clock and data recovery (CDR), and a
transmit de-emphasis (DE) driver to enable data
transmission over long, lossy and crosstalk-impaired
highspeed serial links to achieve BER < 1 × 10–15.
For channels with a high amount of crosstalk, the
DS125DF410 should be used because it has self
calibrating 5-tap decision-feedback equalizer (DFE).
Each channel can independently lock to data rate
from 9.8 to 12.5 Gbps, and associated subrates
(divide by 2, 4, and 8) to support a variety of
communication protocols. A 25-MHz crystal oscillator
clock is used to speed up the CDR lock process. This
clock is not used for training the PLL and does not
need to be synchronous with the serial data.
The programmable settings can be applied using the
SMBus (I2C) interface, or they can be loaded through
an external EEPROM. An on-chip eye monitor and a
PRBS generator allow real-time measurement of
high-speed serial data for system bring-up or field
tuning.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DS125RT410
WQFN (48)
7.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
Switch Fabric
Line Card
DS125DF410
Optical Modules
x4
ASIC
x4
x4
10GbE
CPRI
SFP+ (SFF8431)
ASIC
Interlaken
QSFP
Others
Back
Plane/
Mid
Plane
x4
DS125DF410
Passive Copper
Clean Signal
Noisy Signal
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.

DS125RT410
DS125RT410
SNLS459A – APRIL 2013 – REVISED OCTOBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics .............................................. 8
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 11
7.5 Programming........................................................... 19
7.6 Register Maps ......................................................... 32
8 Application and Implementation ........................ 48
8.1 Application Information............................................ 48
8.2 Typical Application ................................................. 48
9 Power Supply Recommendations...................... 50
10 Layout................................................................... 51
10.1 Layout Guidelines ................................................. 51
10.2 Layout Example .................................................... 51
11 Device and Documentation Support ................. 52
11.1 Documentation Support ........................................ 52
11.2 Community Resources.......................................... 52
11.3 Trademarks ........................................................... 52
11.4 Electrostatic Discharge Caution ............................ 52
11.5 Glossary ................................................................ 52
12 Mechanical, Packaging, and Orderable
Information ........................................................... 52
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (April 2013) to Revision A
Page
• Added ESD Ratings table, Thermal Information table, Feature Description section, Device Functional Modes,
Application and Implementation section, Power Supply Recommendations section, Layout section, Device and
Documentation Support section, and Mechanical, Packaging, and Orderable Information section ..................................... 1
• Changed Channel Register 33 to Reserved. ....................................................................................................................... 42
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Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: DS125RT410


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DS125RT410 SNLS459A – APRI L 2013 – REVISED OCTOBER 2015 DS125RT 410 Low-Power Multi-Rate Quad Channel R etimer 1 Features •1 Each Channel In dependently Locks to Data Rates From 9. 8 to 12.5 Gbps and Submultiples • Fas t Lock Operation Based on Protocol-Sele ct Mode • Low Latency (≈300 ps) • Adaptive Equalization up to 34-dB Boos t at 5 GHz • Adjustable Transmit VOD: 600 to 1300 mVp-p • Adjustable Trans mit De-emphasis to –15 dB • Typical Power Dissipation (EQ+CDR+DE): 150 mW/ Channel • Programmable Output Polarit y Inversion • Input Signal Detection, CDR Lock Detection and Indicator • O n-Chip Eye Monitor (EOM), PRBS Generato r • Single 2.5-V ± 5% Power Supply SMBus and EEPROM Configuration Modes • Operating Temperature Range of – 40 to 85°C • WQFN 48-Pin 7-mm × 7-m m Package • Easy Pin Compatible Upgra de Between Repeater and Retimers – DS100RT410 (EQ+CDR+DE): 10.3125 Gbps – DS100DF410 (EQ+DFE+CDR+DE): 10.3.
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