SLASE74F May   2015  – September 2016 HD3SS3212


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 High-Speed Performance Parameters
    7. 7.7 Switching Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Output Enable and Power Savings
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Down Facing Port for USB3.1 Type C
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curves
    3. 10.3 Systems Examples
      1. 10.3.1 Up Facing Port for USB3.1 Type C
      2. 10.3.2 PCIE/SATA/USB
      3. 10.3.3 PCIE/eSATA
      4. 10.3.4 USB/eSATA
      5. 10.3.5 MIPI Camera Serial Interface
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RKS|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9 Detailed Description

9.1 Overview

The HD3SS3212 is a generic analog differential passive switch that can work for any high-speed interface applications requiring a common mode voltage range of 0 to 2 V and differential signaling with differential amplitude up to 1800 mVpp. It employs adaptive tracking that ensures the channel remains unchanged for the entire common mode voltage range.

Excellent dynamic characteristics of the device allow high-speed switching with minimum attenuation to the signal eye diagram with very little added jitter. It consumes <2 mW of power when operational and has a shutdown mode exercisable by OEn pin resulting <20 µW.

9.2 Functional Block Diagram

HD3SS3212 HD3SS3212I fbd_LASE74.gif

9.3 Feature Description

9.3.1 Output Enable and Power Savings

The HD3SS3212 has two power modes, active/normal operating mode and standby/shutdown mode. During standby mode, the device consumes very-little current to save the maximum power. To enter standby mode, the OEn control pin is pulled high through a resistor and must remain high. For active/normal operation, the OEn control pin should be pulled low to GND or dynamically controlled to switch between H or L.

HD3SS3212 consumes <2 mW of power when operational and has a shutdown mode exercisable by the EN pin resulting <20 µW.

9.4 Device Functional Modes

Table 1. Port Select Control Logic(1)

A0p B0p C0p
A0n B0n C0n
A1p B1p C1p
A1n B1n C1n
(1) The HD3SS3212 can tolerate polarity inversions for all differential signals on Ports A, B, and C. Take care to ensure the same polarity is maintained on Port A versus Ports B/C.