The ISO1540 and ISO1541 devices are low-power, bidirectional isolators that are compatible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.
This isolation technology provides for function, performance, size, and power consumption advantages when compared to optocouplers. The ISO1540 and ISO1541 devices enable a complete isolated I2C interface to be implemented within a small form factor.
The ISO1540 has two isolated bidirectional channels for clock and data lines while the ISO1541 has a bidirectional data and a unidirectional clock channel. The ISO1541 is useful in applications that have a single master while the ISO1540 is suitable for multi-master applications. For applications where clock stretching by the slave is possible, the ISO1540 device should be used.
Isolated bidirectional communication is accomplished within these devices by offsetting the low-level output voltage on side 1 to a value greater than the high-level input voltage on side 1, thus preventing an internal logic latch that otherwise would occur with standard digital isolators.
For additional terms or required resources, click any title below to view the detail page where available.
The MSP430™ CapTIvate™ isolation board (CAPTIVATE-ISO) is an add-on board for the CapTIvate Development Kits (MSP-CAPT-FR2633 or CAPTIVATE-FR2676) that allows a way to maintain Spy-by-Wire, I2C, and UART communication between the CAPTIVATE-PGMR and the CapTIvate MCU Board when the MCU Board is (...)
The ISO154xEVM Evaluation Module has been designed to allow the user to evaluate the electrical parameter performance and features of TI's ISO154x family of 3kV I2C isolators which are based on TI's capacitive isolation technology. The ISO154xEVM Evaluation Module provides for the evaluation of:
The TPS23523 evaluation module (TPS23523EVM-863) contains evaluation and reference circuitry for the TPS23523, which is a low side Hot Swap and Oring controller targeted at telecom applications.
The MSP-ISO Isolation board is an easy-to-use plug-in module that offers galvanic isolation between the Debug and Target circuits for MSP430 LaunchPad developers. This is important in cases where the debug circuitry may adversely affect the quality of analog signal measurements made by the MSP430 (...)
TPS23881EVM-008 is a 24-port (48-channel) daughter card to evaluate the TPS23881 which is a 4-pair, type-4, 8-channel Power-over-Ethernet (PoE) PSE with 200mΩ sense resistor. This daughter card provides evaluation and reference circuitry for the TPS23881 in high port count applications such (...)
Use our reference design selection tool to review and identify designs that best match your application and parameters.
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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.