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PCA9306-Q1

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

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Data sheet

PCA9306-Q1

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) 5.5 VCCB (min) (V) 1.8 VCCB (max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Automotive Operating temperature range (°C) -40 to 105
Features Enable pin Protocols I2C Frequency (max) (MHz) 0.4 VCCA (min) (V) 1.2 VCCA (max) (V) 5.5 VCCB (min) (V) 1.8 VCCB (max) (V) 5.5 Supply restrictions VCCA <= VCCB Rating Automotive Operating temperature range (°C) -40 to 105
VSSOP (DCU) 8 6.2 mm² (2 mm × 3.1 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 2: –40°C to 105°C, TA
    • HBM ESD classification level H2
    • CDM ESD classification level C4B
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Compatible with I2C and SMBus
  • Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I2C devices and multiple controllers
  • 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 connection 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
  • Lock-up-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)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 2: –40°C to 105°C, TA
    • HBM ESD classification level H2
    • CDM ESD classification level C4B
  • 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I2C applications
  • Compatible with I2C and SMBus
  • Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I2C devices and multiple controllers
  • 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 connection 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
  • Lock-up-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)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)

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

The PCA9306-Q1 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.

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

The PCA9306-Q1 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.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet PCA9306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet (Rev. C) PDF | HTML Apr 1, 2022
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML Jul 3, 2024
Application brief Integrated vs. Discrete Open Drain Level Translation PDF | HTML Jan 9, 2024
Functional safety information PCA9306-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML Aug 2, 2021
Application note Choosing the Correct I2C Device for New Designs PDF | HTML Sep 7, 2016
Application note Understanding the I2C Bus PDF | HTML Jun 30, 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters May 15, 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML Feb 13, 2015

Design & development

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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.
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Simulation model

HSPICE MODEL OF PCA9306 (Rev. A)

SCEJ212 (81 KB) - HSpice model
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Simulation model

PCA9306 IBIS Model (Rev. A)

SCPM002 (183 KB) - IBIS model
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Design tool

I2C-DESIGNER — I2C designer tool

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 (...)
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Reference design

TIDA-00271 — ADAS Sensor Interconnect Reference Design Board for Remote Camera and Radar Modules

The ADAS Sensor Interconnect Board is intended for applications where remote sensors like cameras, LIDAR or radar modules need to be connected to a central processing ECU. The board supports up to 3 coaxial and 1 LVDS twisted pair data inputs as well as 3 FMC cable and 1 board to board connector as (...)

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