SCPS239B June   2021  – October 2023 TCA39306-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics (Translating Down)
    7. 5.7 Switching Characteristics (Translating Up)
    8. 5.8 Switching Characteristics
    9. 5.9 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Definition of threshold voltage
      2. 7.1.2 Correct Device Set Up
      3. 7.1.3 Disconnecting a Target from the Main Bus Using the EN Pin
      4. 7.1.4 Supporting Remote Board Insertion to Backplane with TCA39306-Q1
      5. 7.1.5 Switch Configuration
      6. 7.1.6 Controller on Side 1 or Side 2 of Device
      7. 7.1.7 LDO and TCA39306-Q1 Concerns
      8. 7.1.8 Current Limiting Resistance on VREF2
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable (EN) Pin
      2. 7.3.2 Voltage Translation
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 General Applications of I2C
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Bidirectional Voltage Translation
        2. 8.2.2.2 Sizing Pullup Resistors
        3. 8.2.2.3 Bandwidth
      3. 8.2.3 Application Curve
    3. 8.3 Systems Examples: I3C Usage Considerations
      1. 8.3.1 I3C Bus Switching
      2. 8.3.2 I3C Bus Voltage Translation
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

The TCA39306-Q1 is a dual bidirectional voltage-level translator compatible with I2C, SMBus, and I3C with an enable (EN) input, and is operational from 0.9-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.

The device allows bidirectional voltage translations between 0.85 V and 5 V, without the use of a direction pin. The low ON-state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.

In addition to voltage translation, the TCA39306-Q1 can be used to isolate a higher speed bus from a lower speed bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
TCA39306-Q1 VSSOP (8) 2 mm × 3.1 mm
(1) For more information, see Section 11.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
GUID-20211209-SS0I-X3RL-5ZPL-TP1LMVK8Z7SV-low.svg Simplified Application Diagram