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PCA9306

ACTIVE

2-bit bidirectional 400-kHz I2C/SMBus voltage level translator

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Data sheet

PCA9306

ACTIVE
Data sheet Order now

Product details

Features Enable pin Protocols I2C Frequency (max) (MHz) 0.4 VCCA (min) (V) 1.2 VCCA (max) (V) 3.3 VCCB (min) (V) 1.8 VCCB (max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Catalog Operating temperature range (°C) -40 to 85
Features Enable pin Protocols I2C Frequency (max) (MHz) 0.4 VCCA (min) (V) 1.2 VCCA (max) (V) 3.3 VCCB (min) (V) 1.8 VCCB (max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YZT) 8 1.9404 mm² 1.98 x 0.98 SSOP (DCT) 8 11.8 mm² 2.95 x 4 VSSOP (DCU) 8 6.2 mm² 2 x 3.1 X2SON (DQE) 8 1.4 mm² 1.4 x 1
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I 2C Applications
  • I 2C and SMBus compatible
  • Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I 2C devices and multiple controllers
  • Allows voltage-level translation between
    • 1.2-V V REF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V V REF2
    • 1.8-V V REF1 and 2.5-V, 3.3-V, or 5-V V REF2
    • 2.5-V V REF1 and 3.3-V or 5-V V REF2
    • 3.3-V V REF1 and 5-V V REF2
  • 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 I 2C I/O ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V Tolerant I 2C 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-Bit bidirectional translator for SDA and SCL lines in mixed-mode I 2C Applications
  • I 2C and SMBus compatible
  • Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I 2C devices and multiple controllers
  • Allows voltage-level translation between
    • 1.2-V V REF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V V REF2
    • 1.8-V V REF1 and 2.5-V, 3.3-V, or 5-V V REF2
    • 2.5-V V REF1 and 3.3-V or 5-V V REF2
    • 3.3-V V REF1 and 5-V V REF2
  • 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 I 2C I/O ports (SCL1, SDA1, SCL2, and SDA2)
  • 5-V Tolerant I 2C 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)

The PCA9306 device is a dual bidirectional I 2C and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.2-V to 3.3-V V REF1 and 1.8-V to 5.5-V V REF2.

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 (R ON) 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 bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.

The PCA9306 device is a dual bidirectional I 2C and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.2-V to 3.3-V V REF1 and 1.8-V to 5.5-V V REF2.

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 (R ON) 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 bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.
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Technical documentation

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Type Title Date
* Data sheet PCA9306 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet (Rev. O) PDF | HTML 06 Sep 2023
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
Application brief Enabling AI Accelerators with Voltage Level Translation PDF | HTML 01 May 2024
Application brief Integrated vs. Discrete Open Drain Level Translation PDF | HTML 09 Jan 2024
Certificate PCA9306EVM EU Declaration of Conformity (DoC) 29 Jun 2023
Application brief Best Practices: I2C Devices on an I3C Shared Bus PDF | HTML 30 Mar 2023
Application note How to Debug I2C PDF | HTML 30 Mar 2023
Product overview Translate Voltages for I2C for PCA9306 LSF0102 TXS0102 PDF | HTML 14 Sep 2022
EVM User's guide PCA9306 I2C Buffer Evaluation Module 26 Oct 2018
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Technical article Intro to I2C: what the Internet doesn’t tell you PDF | HTML 24 Nov 2016
Application note Choosing the Correct I2C Device for New Designs PDF | HTML 07 Sep 2016
Selection guide I2C Infographic Flyer 03 Dec 2015
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
Application note Understanding the I2C Bus PDF | HTML 30 Jun 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters 15 May 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 13 Feb 2015
Application note Programming Fun Lights With TI's TCA6507 30 Nov 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

PCA9306EVM — PCA9306 I2C translator evaluation module

This EVM can be used to evaluate the PCA9306 product in the DCU package. The I2C buses are easily accessed via SDA_1, SCL_1, SDA_2, and SCL_2 test points, and symmetrically laid out for optimal performance. All IC signals are available through test point connections.
User guide: PDF
Not available on TI.com
Evaluation board

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The TCA6507 EVM comes equipped with an RGB LED and 4 green LEDs to test the capabilities of the device. There is an onboard level shifter for translating between different logic levels of the host and TCA6507.

User guide: PDF | HTML
Not available on TI.com
Simulation model

HSPICE MODEL OF PCA9306 (Rev. A)

SCEJ212A.ZIP (81 KB) - HSpice Model
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Simulation model

PCA9306 IBIS Model (Rev. A)

SCPM002A.ZIP (54 KB) - IBIS Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Package Pins CAD symbols, footprints & 3D models
DSBGA (YZT) 8 Ultra Librarian
SSOP (DCT) 8 Ultra Librarian
VSSOP (DCU) 8 Ultra Librarian
X2SON (DQE) 8 Ultra Librarian
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