SLLSE41H June   2010  – March 2016 SN75LVCP601

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Power Dissipation Characteristics
    7. 6.7 Timing Requirements
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Jitter and VOD Results: Case 1 at 6 Gbps
    2. 7.2 Jitter and VOD Results: Case 2 at 3 Gbps
    3. 7.3 Jitter and VOD Results: Case 3 at 1.5 Gbps
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Equalization
      2. 8.3.2 Output De-Emphasis
      3. 8.3.3 Out-of-Band (OOB) Support
    4. 8.4 Device Functional Modes
      1. 8.4.1 Low-Power Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Equalization Configuration
        2. 9.2.2.2 De-emphasis Configuration
      3. 9.2.3 Application Curves
        1. 9.2.3.1 SN75LVCP601 Equalization Settings For Various Input Trace Lengths
        2. 9.2.3.2 SN75LVCP601 De-emphasis Settings For Various Output Trace Lengths
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

The SN75LVCP601 is a dual-channel SATA redriver and signal conditioner supporting data rates of 6 Gbps. The inputs incorporate an OOB (out-of-band) detector, which automatically squelches the output while maintaining a stable common-mode voltage compliant to the SATA link.

SN75LVCP601 app_info_llse41.gif Figure 26. Typical SN75LVCP601 Placement in the System

9.2 Typical Application

This typical application describes how to configure the EQ, DE, and DEW configuration pins of the SN75LVCP601 device based on board trace length between the SATA Host and the SN75LVCP601 and the SN75LVCP601 and SATA Device. Actual configuration settings may differ due to additional factors such as board layout, trace widths, and connectors used in the signal path.

SN75LVCP601 dev_impl_llse41.gif
1. Place supply capacitors close to device pin.
2. With no external control is implemented, one can leave EN open or tie it to the supply .
3. Output de-emphasis setting is for –2 dB, EQ for 7 dB, and DE duration for SATA I/II/III operation for both channels.
4. Actual EQ/DE duration settings depend on device placement relative to host and SATA connector.
Figure 27. Typical Device Implementation

9.2.1 Design Requirements

Typically, system trace length from the SATA host to the SN75LVCP601 device and trace length from the SN75LVCP601 device to a SATA device differ and require different equalization and de-emphasis settings for the host side and device side.

For example:

  • A system with a 6-inch trace from the SN75LVCP601 device to a SATA host may set EQ1 (Rx1±) to 7 dB, and DE2 (Tx2±) to –2 dB and DEW2 (Tx2±) to long pulse duration.
  • The same system with a 1-inch trace from the SN75LVCP601 device to a SATA HDD may set EQ2 (Rx2±) to 0 dB, and DE1 (Tx1±) to 0 dB and DEW1 (Tx1±) to short pulse duration.

Refer to Application Curves for recommended EQ, DE and DEW settings based on trace length. It is highly recommended to add both pullup- and pulldown-resistor options in the layout to fine-tune the settings if needed.

Input Signal Characteristics:

  • Data Rate: 6 Gbps
  • Pattern: PRBS7
  • No pre-emphasis
  • Signal amplitude: 500 mVp-p
  • 18-inch SMA cable from test equipment to input and output trace
SN75LVCP601 design_req_diagram_llse41.gif Figure 28. Measurement Set-up

9.2.2 Detailed Design Procedure

9.2.2.1 Equalization Configuration

Each differential input of the SN75LVCP601 device has programmable equalization in the front stage. The equalization setting is shown in Table 2. The input equalizer is designed to recover a signal even when no eye is present at the receiver and effectively supports FR4 trace input from 3 inches to greater than 24 inches at
SATA 6 Gbps speed.

Table 2. Equalization Settings

EQ1, EQ2 CH1, CH2 EQUALIZATION dB (AT 6 Gbps)
NC 0
0 7
1 14

9.2.2.2 De-emphasis Configuration

The SN75LVCP601 device provides the de-emphasis settings shown in Table 3. De-emphasis is controlled independently for each channel and is set by the DE1, DE2, DEW1 and DEW2 pins of the SN75LVCP601 device. The recommended settings for these pins are listed in Application Curves. Output de-emphasis is capable of supporting FR4 trace lengths at the output from 3 inches to 12+ inches at SATA 6 Gbps speed.

Table 3. De-emphasis Settings

DE1, DE2 CH1, CH2 DE-EMPHASIS dB (AT 6 Gbps)
0 0
1 –2
NC –4

Table 4. DE Width Control

DEW1, DEW2 DE-EMPHASIS WIDTH FOR CH1, CH2
0 Short de-emphasis pulse duration
1 Long de-emphasis pulse duration

9.2.3 Application Curves

9.2.3.1 SN75LVCP601 Equalization Settings For Various Input Trace Lengths

SN75LVCP601 EQ_3_inch_input_TP2_sllse41.png
Input Trace Length = 3 in.
EQ1, EQ2 Setting = NC (0 dB)
Figure 29. Input Eye (TP2)
SN75LVCP601 EQ_6_inch_input_TP2_sllse41.png
Input Trace Length = 6 in.
EQ1, EQ2 Setting = 0 (7 dB)
Figure 31. Input Eye (TP2)
SN75LVCP601 EQ_12_inch_input_TP2_sllse41.png
Input Trace Length = 12 in.
EQ1, EQ2 Setting = 0 (7 dB)
Figure 33. Input Eye (TP2)
SN75LVCP601 EQ_24_inch_input_TP2_sllse41.png
Input Trace Length = 24 in.
EQ1, EQ2 Setting = 0 (7 dB)
Figure 35. Input Eye (TP2)
SN75LVCP601 EQ_36_inch_input_TP2_sllse41.png
Input Trace Length = 36 in.
EQ1, EQ2 Setting = 1 (14 dB)
Figure 37. Input Eye (TP2)
SN75LVCP601 EQ_48_inch_input_TP2_sllse41.png
Input Trace Length = 48 in.
EQ1, EQ2 Setting = 1 (14 dB)
Figure 39. Input Eye (TP2)
SN75LVCP601 EQ_3_inch_output_TP4_sllse41.png
Input Trace Length = 3 in.
EQ1, EQ2 Setting = NC (0 dB)
Figure 30. Output Eye (TP4)
SN75LVCP601 EQ_6_inch_output_TP4_sllse41.png
Input Trace Length = 6 in.
EQ1, EQ2 Setting = 0 (7 dB)
Figure 32. Output Eye (TP2)
SN75LVCP601 EQ_12_inch_output_TP4_sllse41.png
Input Trace Length = 12 in.
EQ1, EQ2 Setting = 0 (7 dB)
Figure 34. Output Eye (TP2)
SN75LVCP601 EQ_24_inch_output_TP4_sllse41.png
Input Trace Length = 24 in.
EQ1, EQ2 Setting = 0 (7 dB)
Figure 36. Output Eye (TP2)
SN75LVCP601 EQ_36_inch_output_TP4_sllse41.png
Input Trace Length = 36 in.
EQ1, EQ2 Setting = 1 (14 dB)
Figure 38. Output Eye (TP2)
SN75LVCP601 EQ_48_inch_output_TP4_sllse41.png
Input Trace Length = 36 in.
EQ1, EQ2 Setting = 1 (14 dB)
Figure 40. Output Eye (TP2)

9.2.3.2 SN75LVCP601 De-emphasis Settings For Various Output Trace Lengths

SN75LVCP601 DE_0_inch_sllse41.png
Output Trace Length = 0 in.
DE1, DE2 Setting = 0 (0 dB)
DEW1, DEW2 Setting = 0 (Short pulse duration)
Figure 41. Output Eye (TP4)
SN75LVCP601 DE_6_inch_sllse41.png
Output Trace Length = 6 in.
DE1, DE2 Setting = 1 (–2 dB)
DEW1, DEW2 Setting = 1 (Long pulse duration)
Figure 43. Output Eye (TP4)
SN75LVCP601 DE_18_inch_sllse41.png
Output Trace Length = 12 in.
DE1, DE2 Setting = NC (–4 dB
DEW1, DEW2 Setting = 1 (Long pulse duration)
Figure 45. Output Eye (TP4)
SN75LVCP601 DE_3_inch_sllse41.png
Output Trace Length = 3 in.
DE1, DE2 Setting = 0 (0 dB)
DEW1, DEW2 Setting = 0 (Short pulse duration)
Figure 42. Output Eye (TP4)
SN75LVCP601 DE_12_inch_sllse41.png
Output Trace Length = 12 in.
DE1, DE2 Setting = 1 (–2 dB)
DEW1, DEW2 Setting = 1 (Long pulse duration)
Figure 44. Output Eye (TP4)