2-bit bidirectional 2.3- to 5.5-V hot swappable 400-kHz I2C/SMBus buffer with Stuck Bus Recovery
Product details
Parameters
Package | Pins | Size
Features
- Supports bidirectional data transfer of I2C bus signals
- Operating power-supply voltage range of 2.3 V to 5.5 V
- TA ambient air temperature range of -40 °C to 125 °C
- Stuck bus recovery featuring automatic bus recovery
- 1-V Precharge on all SDA and SCL lines prevents corruption during live insertion
- Accommodates standard mode and fast mode I2C devices
- Supports clock stretching, arbitration and synchronization
- Powered-off high-impedance I2C pins
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Description
The TCA4307 is a hot-swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock lines. Control circuitry prevents the backplane-side I2C lines (in) from being connected to the card-side I2C lines (out) until a stop command or bus idle condition occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are pre-charged to 1 V to minimize the current required to charge the parasitic capacitance of the device.
The TCA4307 has stuck bus recovery, which automatically disconnects the bus if it detects either SDAOUT or SCLOUT are low for about 40 ms. Once the bus is disconnected, the device automatically generates up to 16 pulses on SCLOUT to attempt to reset the device which is holding the bus low.
When the I2C bus is idle, the TCA4307 can be put into shutdown mode by setting the EN pin low, reducing power consumption. When EN is pulled high, the TCA4307 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TCA4307 Hot Swappable I2C Bus and SMBus Buffer with Stuck Bus Recovery datasheet | Dec. 15, 2017 |
Application note | I2C Solutions for Hot Swap Applications | Jan. 31, 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.
The (...)
Features
- Simplifies prototyping of SMT IC’s
- Supports 6 common package types
- Low Cost
Description
Features
- Hot swappable
- Low dynamic offset voltage
- Rise time accelerator
- Adjustable pull up resistors and capacitave loading switches
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
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DGK) | 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
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Support & training
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