SCDS411D July   2019  – October 2022 SN3257-Q1

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 Dynamic Characteristics
    7. 6.7 Timing Requirements
    8.     Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1  On-Resistance
    2. 7.2  Off-Leakage Current
    3. 7.3  On-Leakage Current
    4. 7.4  IPOFF Leakage Current
    5. 7.5  Transition Time
    6. 7.6  tON (EN) and tOFF (EN) Time
    7. 7.7  tON (VDD) and tOFF (VDD) Time
    8. 7.8  Break-Before-Make Delay
    9. 7.9  Propagation Delay
    10. 7.10 Skew
    11. 7.11 Charge Injection
    12. 7.12 Capacitance
    13. 7.13 Off Isolation
    14. 7.14 Channel-to-Channel Crosstalk
    15. 7.15 Bandwidth
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Bidirectional Operation
      2. 8.3.2 Beyond Supply Operation
      3. 8.3.3 1.8 V Logic Compatible Inputs
      4. 8.3.4 Powered-off Protection
      5. 8.3.5 Fail-Safe Logic
      6. 8.3.6 Integrated Pull-Down Resistors
    4. 8.4 Device Functional Modes
      1. 8.4.1 Truth Tables
  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
      3. 9.2.3 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 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.2 Detailed Design Procedure

The SN3257-Q1 can be operated without any external components except for the supply decoupling capacitors. The SN3257-Q1 has internal weak pull-down resistors (6 MΩ) to GND so that it powers-on with the switches in a known state. All inputs signals passing through the switch must fall within the recommended operating conditions of the SN3257-Q1 including signal range and continuous current. This design example can support SPI signals that range from 0 V to 3.3 V when the device is powered. This example can also utilize the Powered-off Protection feature and the inputs can range from 0 V to 3.6 V when VDD = 0 V. The maximum continuous current can be 25 mA. Due to the voltage range and high speed capability, the SN3257-Q1 example is suitable for use in SPI, JTAG, and I2S applications.