2-Bit Bidirectional 1-MHz I2C Bus and SMBus Voltage-Level Shifter
Product details
Parameters
Package | Pins | Size
Features
- 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C Applications
- Provides Bidirectional Voltage Translation With No Direction Pin
- High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC = 0 V
- Internal 10-kΩ Pullup Resistor on All SDA and SCL Pins
- 1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA ≤ VCCB)
- VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
- No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First
- Low Ioff of 2 µA When Either VCCA or VCCB = 0 V
- OE Input Can Be Tied Directly to VCCA Or Controlled By GPIO
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- A Port
- 2500-V Human-Body Model (A114-B)
- 250-V Machine Model (A115-A)
- 1500-V Charged-Device Model (C101)
- B Port
- 8-kV Human-Body Model (A114-B)
- 250-V Machine Model (A115-A)
- 1500-V Charged-Device Model (C101)
- A Port
All trademarks are the property of their respective owners.
Description
The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the A-side, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3.3-V, and
5-V supply rails.
The OE input pin is referenced to VCCA, can be tied directly to VCCA, but it is also 5.5-V tolerant. The OE pin can also be controlled and set to a logic low to place all the SCL and SDA pins in a high-impedance state, which significantly reduces the quiescent current consumption.
Under normal I2C and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard I2C speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode), or 1 MHz (Fast-mode Plus). The device can also be used as a general purpose level translator, and when the A- and B-side ports are both driven with push-pull devices the TCA9406 can support up to 24 Mbps.
The TCA9406 features internal 10-kΩ pullup resistors on SCL_A, SDA_A, SCL_B, and SDA_B. Additional external pullup resistors can be added to the bus to reduce the total pullup resistance and speed up rising edges.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TCA9406 2-Bit Bidirectional 1-MHz, I2C Bus and SMBus Voltage-Level Translator With 8-kV HBM ESD datasheet (Rev. G) | Nov. 29, 2018 |
User guide | TCA9406 I2C Translator Evaluation Module | Oct. 26, 2018 | |
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 |
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 the VCCA, VCCB, OE, SDA_A, SCL_A, SDA_B, and SCL_B pins
- Footprint for a socket for evaluating multiple TCA9406 devices
- Footprints to test different capacitive loads
- Footprints to test different pullup resistor values
- Different load options allow for the testing of different translator (...)
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
Design files
-
download TIDA-01572 BOM.pdf (74KB) -
download TIDA-01572 Assembly Drawing.pdf (469KB) -
download TIDA-01572 PCB.pdf (2766KB) -
download TIDA-01572 CAD Files.zip (2934KB) -
download TIDA-01572 Gerber.zip (1650KB)
Design files
-
download TIDA-00609 BOM.pdf (125KB) -
download TIDA-00609 Assembly Drawing.pdf (1219KB) -
download TIDA-00609 PCB.pdf (2187KB) -
download TIDA-00609 CAD Files.zip (24452KB) -
download TIDA-00609 Gerber.zip (7534KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
DSBGA (YZP) | 8 | View options |
SM8 (DCT) | 8 | View options |
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
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.