Automotive 2-bit bidirectional 400-kHz I2C/SMBus voltage level translator
Product details
Parameters
Package | Pins | Size
Features
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 2: –40°C to 105°C
- Device HBM ESD Classification Level H2
- Device 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 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
- 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V
- 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)
Description
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.
In I2C applications, the bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9306-Q1 enables the system designer to isolate two halves of a bus; thus, more I2C devices or longer trace length can be accommodated.
The PCA9306-Q1 also can be used to run two buses, one at 400-kHz operating frequency and the other at 100-kHz operating frequency. If the two buses are operating at different frequencies, the 100-kHz bus must be isolated when the 400-kHz operation of the other bus is required. If the master is running at 400 kHz, the maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater.
All channels have the same electrical characteristics, and there is minimal deviation from one output to another in voltage or propagation delay. This is a benefit over discrete transistor voltage translation solutions, because the fabrication of the switch is symmetrical. The translator provides excellent ESD protection to lower-voltage devices and at the same time protects less ESD-resistant devices.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | PCA9306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet (Rev. B) | Feb. 08, 2016 |
Selection guide | Logic Guide (Rev. AB) | Jun. 12, 2017 | |
Application note | Choosing the Correct I2C Device for New Designs | Sep. 07, 2016 | |
Application note | Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) | Dec. 02, 2015 | |
Application note | Understanding the I2C Bus | Jun. 30, 2015 | |
Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | May 15, 2015 | |
Application note | I2C Bus Pull-Up Resistor Calculation | Feb. 13, 2015 | |
Application note | Programming Fun Lights With TI's TCA6507 | Nov. 30, 2007 | |
Application note | Semiconductor Packing Material Electrostatic Discharge (ESD) Protection | Jul. 08, 2004 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Access to VDPU1, VDPU2, EN, SDA1, SCL1, SDA2, and SCL2 pins
- Footprint for a socket for evaluating multiple PCA9306 devices
- Footprints to test different capacitive loads
- Footprints to test different pullup resistor values
- Different load options allow for the testing of different translator configurations (...)
Design tools & simulation
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
- (...)
Features
- GUI-based web application
- Exportable designs
- JSON file uploader
- Bill of materials generator
Reference designs
- To use the MMWCAS-DSP-EVM as a capture card to fully evaluate the AWR2243 four-chip cascade performance by using the mmWave studio tool, please read the TIDEP-01012 design guide.
- To use the MMWCAS-DSP-EVM to develop radar real time SW application (...)
Design files
-
download TIDEP-01017 Assembly Drawing (Rev. A).pdf (2726KB) -
download TIDEP-01017 BOM (Rev. A).pdf (224KB) -
download TIDEP-01017 CAD Files (Rev. B).zip (11490KB) -
download TIDEP-01017 Gerber (Rev. B).zip (3095KB) -
download TIDEP-01017 PCB (Rev. B).pdf (41832KB) -
download PROC055A Cascade Radar Host Design Files.zip (19371KB)
Design files
-
download TIDA-00271 BOM.pdf (228KB) -
download TIDA-00271 Gerber.zip (4203KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DCU) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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