SLLSFI8 February   2021 SN55LVCP22A-SP

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 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Select Pins
      2. 8.3.2 Output Enable Pins
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Low-Voltage Positive Emitter-Coupled Logic (LVPECL)
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
      2. 9.2.2 Current-Mode Logic (CML)
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
      3. 9.2.3 Single-Ended (LVPECL)
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
      4. 9.2.4 Low-Voltage Differential Signaling (LVDS)
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
      5. 9.2.5 Cold Sparing
      6. 9.2.6 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.5 Cold Sparing

GUID-20210125-CA0I-NVGH-7C8P-MPXSH9GNRDGZ-low.svg Figure 9-5 LVDS Cold sparing example

SN55LVCP22A-SP can be used in cold sparing application where a redundant device is on the data bus without drawing additional power. One of the devices TXA or TXB form transmitter redundant pair can be powered down in cold spare mode. Similarly, one for the devices RXA or RXB from receiver redundant pair can be powered down in cold spare mode.

SN55LVCP22A-SP remains in a high impedance power-off state, when VCC is grounded at 0V (within 250mV of GND).

Table 9-5 Cold sparing TX configuration example
Transmitter redundant pair Operating state VCCA VCCB
TXA Active 3.3 V 0 V
TXB Cold spare
TXA Cold spare 0 V 3.3 V
TXB Active
Table 9-6 Cold sparing RX configuration example
Receiver redundant pair Operating state VCCA VCCB
RXA Active 3.3 V 0 V
RXB Cold spare
RXA Cold spare 0 V 3.3 V
RXB Active