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Parameters

Features Enable Pin Frequency (Max) (kHz) 12500 VCCA (Min) (V) 0.85 VCCA (Max) (V) 5.5 VCCB (Min) (V) 1.65 VCCB (Max) (V) 5.5 Supply restrictions VCCA<=VCCB Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other I2C level shifters, buffers & hubs

Package | Pins | Size

VSSOP (DCU) 8 6 mm² 2 x 3.1 open-in-new Find other I2C level shifters, buffers & hubs

Features

  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Standard-mode, fast-mode, and fast-mode plus I2C and SMBus compatible
  • I3C compatible (12.5 MHz supported)
  • Allows voltage-level translation between
    • 0.9-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
    • 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 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
  • ESD lrotection Exceeds JESD 22
    • 2000-V human-body model (A114-A)
    • 1000-V charged-device model (C101)
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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.

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Technical documentation

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* Data sheet TCA39306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet Feb. 16, 2012

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description

This EVM provides configurable loading conditions through adjustable pull up resistors and bus capacitance which allows designers to easily test the performance of this device in their system.

Features
  • Dip switches to configure capacitive loading
  • TCA39306DDF and TCA39306DTM package layout included but not populated
  • Adjustable pull up resistors

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
DESIGN TOOL Download
I2C designer tool
I2C-DESIGNER — Use the I2C Designer tool to quickly resolve conflicts in addressing, voltage level and frequency in I2C based designs. Enter master and slave inputs to automatically generate an I2C tree or easily build a custom solution. This tool will help designers save time and comply with the I2C standard with (...)
Features
  • GUI-based web application
  • Exportable designs
  • JSON file uploader
  • Bill of materials generator

CAD/CAE symbols

Package Pins Download
VSSOP (DCU) 8 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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