DS125BR401A Repeater Datasheet

DS125BR401A Datasheet, PDF, Equivalent


Part Number

DS125BR401A

Description

Low-Power 12 Gbps 4-Lane Linear Repeater

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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DS125BR401A
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DS125BR401A
SNLS466A – SEPTEMBER 2013 – REVISED MARCH 2014
DS125BR401A Low-Power 12 Gbps 4-Lane Linear Repeater With Equalization
1 Features
1 Low 65-mW/Channel (Typ) Power Consumption,
With Option to Power Down Unused Channels
• Linear Equalization allows for Link Training in
PCIe and SAS
• Supports Out-of-Band (OOB) Signaling
• Advanced Signal Conditioning B-Side I/O
– Receive CTLE up to 24 dB at 6 GHz
– Transmit (Tx) DE > 10 dB
– Tx Output Voltage: 700 mV to 1400 mV
• Advanced Signal Conditioning A-Side I/O
– Receive CTLE up to 10 dB at 6 GHz
– Linear output drive
– Output voltage range over 1200mV
Programmable via Terminal Selection, EEPROM,
or SMBus Interface
• Single Supply Voltage: 2.5 V or 3.3 V
40°C to 85°C Operating Temperature Range
• 4 kV HBM ESD Rating
• Flow-Thru Layout in 10mmx5.5mm 54-Terminal
Leadless WQFN Package
2 Applications
• SAS/SATA
• PCI Express
• Other Proprietary Interfaces up to 12 Gbps
3 Description
The DS125BR401A is an extremely low-power high-
performance repeater/redriver designed to support
four lanes carrying high speed interface up to 12
Gbps. The B-Side receiver's continuous time linear
equalizers (CTLE) provide high frequency boost of up
to +24 dB at 6 GHz (12 Gbps) and are capable of
opening an input eye that is completely closed due to
inter symbol interference (ISI) induced by
interconnect medium such as backplane traces or
twinaxial copper cables. The programmable
equalization allows maximum flexibility in the physical
placement within the interconnect channel. The A-
Side channel has a 10 dB linear equalizer and linear
output driver.
The A-Side channel has a settable 3-10 dB linear
equalizer coupled to a linear output driver. When
operating in SAS-3 and PCIe Gen-3 applications the
DS125BR401A preserves transmit signal
characteristics allowing the host controller and the
end point to negotiate transmit equalizer coefficients.
This transparency to the link training protocol aides
system level interoperability and minimum latency.
The programmable settings can be applied easily via
Terminals, software (SMBus or I2C), or loaded via an
external EEPROM. In EEPROM mode, the
configuration information is automatically loaded on
power up, which eliminates the need for an external
microprocessor or software driver.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
DS125BR401ANJY
WQFN (48) 10 mm x 5,5 mm
SAS-3 Application
SAS-3 Controller 0
-10 dB Max
DS125BR401A
SAS-3 Controller 1
-24 dB Max
RX OUTB INB
TX
TX INA OUTA
RX
Channel Loss ~ Equal
Channel Loss ~ Equal
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.

DS125BR401A
DS125BR401A
SNLS466A – SEPTEMBER 2013 – REVISED MARCH 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Terminal Configuration and Functions................ 3
6 Specifications......................................................... 6
6.1 Absolute Maximum Ratings ...................................... 6
6.2 Handling Ratings....................................................... 6
6.3 Recommended Operating Conditions....................... 6
6.4 Thermal Information ................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Electrical Characteristics — Serial Management Bus
Interface .................................................................. 10
6.7 Timing Requirements Serial Bus Interface ............. 10
6.8 Typical Characteristics ............................................ 12
7 Detailed Description ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 14
7.4 Device Functional Modes........................................ 14
7.5 Signal Conditioning Settings ................................... 16
7.6 Programming........................................................... 18
7.7 Register Maps ......................................................... 25
8 Applications and Implementation ...................... 38
8.1 Application Information............................................ 38
8.2 Typical Application .................................................. 39
9 Power Supply Recommendations...................... 42
10 Layout................................................................... 43
10.1 Layout Guidelines ................................................. 43
10.2 Layout Example .................................................... 43
11 Device and Documentation Support ................. 44
11.1 Trademarks ........................................................... 44
11.2 Electrostatic Discharge Caution ............................ 44
11.3 Glossary ................................................................ 44
12 Mechanical, Packaging, and Orderable
Information ........................................................... 44
4 Revision History
Changes from Original (September 2013) to Revision A
Page
• Changed from preview to production data document. .......................................................................................................... 1
• Changed to new TI datasheet standard: added Handling Ratings table and Device and Documentation section. .............. 1
2 Submit Documentation Feedback
Copyright © 2013–2014, Texas Instruments Incorporated
Product Folder Links: DS125BR401A


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DS125BR401A SNLS466A – SEP TEMBER 2013 – REVISED MARCH 2014 DS12 5BR401A Low-Power 12 Gbps 4-Lane Linear Repeater With Equalization 1 Features •1 Low 65-mW/Channel (Typ) Power Con sumption, With Option to Power Down Unu sed Channels • Linear Equalization al lows for Link Training in PCIe and SAS • Supports Out-of-Band (OOB) Signalin g • Advanced Signal Conditioning B-Si de I/O – Receive CTLE up to 24 dB at 6 GHz – Transmit (Tx) DE > 10 dB – Tx Output Voltage: 700 mV to 1400 mV Advanced Signal Conditioning A-Side I /O – Receive CTLE up to 10 dB at 6 GH z – Linear output drive – Output vo ltage range over 1200mV Programmable vi a Terminal Selection, EEPROM, or SMBus Interface • Single Supply Voltage: 2. 5 V or 3.3 V • −40°C to 85°C Oper ating Temperature Range • 4 kV HBM ES D Rating • Flow-Thru Layout in 10mmx5 .5mm 54-Terminal Leadless WQFN Package 2 Applications • SAS/SATA • PCI Express • Other Proprietary In.
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