SCPS113L October   2004  – April 2016 PCA9306

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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  Switching Characteristics AC Performance (Translating Down) (EN = 3.3 V)
    7. 6.7  Switching Characteristics AC Performance (Translating Down) (EN = 2.5 V)
    8. 6.8  Switching Characteristics AC Performance (Translating Up) (EN = 3.3 V)
    9. 6.9  Switching Characteristics AC Performance (Translating Up) (EN = 2.5 V)
    10. 6.10 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable (EN) Pin
      2. 8.3.2 Voltage Translation
    4. 8.4 Device Functional Modes
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 General Applications of I2C
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Bidirectional Voltage Translation
        2. 9.2.2.2 Sizing Pullup Resistors
        3. 9.2.2.3 PCA9306 Bandwidth
      3. 9.2.3 Application Curve
  10. 10Power Supply Requirements
  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

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1 Features

  • 2-Bit Bidirectional Translator for SDA and SCL Lines in Mixed-Mode I2C Applications
  • I2C and SMBus Compatible
  • Less Than 1.5-ns Maximum Propagation Delay to Accommodate Standard-Mode and Fast-Mode I2C Devices and Multiple Masters
  • Allows Voltage-Level Translation Between
    • 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V,
      or 5-V VREF2
    • 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
    • 2.5-V VREF1 and 3.3-V or 5-V VREF2
    • 3.3-V VREF1 and 5-V VREF2
  • Provides Bidirectional Voltage Translation With No Direction Pin
  • Low 3.5-Ω ON-State Resistance Between Input and Output Ports Provides Less Signal Distortion
  • Open-Drain I2C I/O Ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V Tolerant I2C I/O Ports to Support Mixed-Mode Signal Operation
  • High-Impedance SCL1, SDA1, SCL2, and SDA2 Pins for EN = Low
  • Lockup-Free Operation for Isolation When EN = Low
  • Flow-Through Pinout for Ease of Printed-Circuit-Board Trace Routing
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 1000-V Charged-Device Model (C101)

2 Applications

  • I2C, SMBus, PMBus, MDIO, UART, Low-Speed SDIO, GPIO, and Other Two-Signal Interfaces
  • Servers
  • Routers (Telecom Switching Equipment)
  • Personal Computers
  • Industrial Automation

3 Description

The PCA9306 device is a dual bidirectional I2C and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.

The PCA9306 device allows bidirectional voltage translations between 1.2 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 PCA9306 device can be used to isolate a 400-kHz bus from a 100-kHz busby controlling the EN pin, and disconnecting the slower bus during fast-mode communication.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
PCA9306SSOP (8)2.95 mm x 2.80 mm
VSSOP (8)2.30 mm x 2.00 mm
X2SON (8)1.40 mm x 1.00 mm
DSBGA (8)1.98 mm x 0.98 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Application Diagram

PCA9306 simpapdia_scps113.gif