TI Korea (CEO Kent Jeon, www.ti.com/ww/kr ) December 26, 2012 – TI (CEO Kent Jeon) announced the launch of a family of I2C-compatible bidirectional isolators that reduce power consumption by up to 38% compared to competing products. The new ICs can replace more than 16 devices typically required to isolate I2C signals in industrial applications. Additionally, the ISO1540 and ISO1541 provide superior transient immunity and faster switching times compared to optocouplers, improving isolation lifespan in a wide range of applications including power supplies, networking, communications, Power over Ethernet (PoE), and battery management systems. (For more information on products and sample orders, please visit www.ti.com/iso1540-pr-kr )

The ISO1540 and ISO1541 isolate logic input and output buffers using proprietary capacitive isolation based on silicon dioxide (SiO2) films. This technique improves the lifespan of the isolators by more than three times compared to optocouplers or magnetic isolators. The ISO1540 provides two isolated bidirectional channels for clock and data lines, making it suitable for applications using multiple masters. The ISO1541 provides one bidirectional data channel and one unidirectional clock channel, making it suitable for single-master applications. In addition to these I2C isolator families, TI has established a comprehensive portfolio of long-life digital isolation products. Other products include isolated CAN, devices utilizing RS-485 interfaces, isolated amplifiers, and isolation products for industrial applications.

Key Features and Benefits of ISO1540 and ISO1541
• Lowest Power: The ISO1540 and ISO1541 consume less than 8.5mA of current at 5V, reducing power consumption by up to 38% compared to competing ICs, thereby reducing heat generation in industrial applications.
• Rapid switching time: Enables fast data transmission with a maximum propagation delay of 62 nanoseconds, 52% better than competing ICs.
• High Reliability: Achieves excellent reliability even in harsh environments with ±50kV/µs rated transient immunity.
• Internal logic latch prevention: Achieves isolated bidirectional communication by adopting an offset configuration that prevents device latch-up and ensures reliable operation.

Fully isolated power supply
The SN6501 transformer driver can be used with transformers, rectifiers, or regulators such as TI's 5V TPS70950 or 3.3V TPS70933 to provide secondary power to ISO1540 and ISO1541. When used with these products, a small, inexpensive, highly efficient, and low-EMI solution can be achieved to supply isolated power to a system. The SN6501 evaluation module can evaluate device performance in applications where power is supplied to both sides of an isolation film by a single power supply.

Tools and Support
The ISO1540EVM can evaluate device parameters for ISO1540 and ISO1541 and refer to board layouts. This evaluation module is available for purchase at $49. Through the Industrial Interface Forum of the TI E2E™ community, engineers using ISO1540 and ISO1541 can ask questions and get answers from TI experts.

Supply timing, packaging, and price
ISO1540 and ISO1541 are available in an industry-standard 8-pin SOIC package. Prices are $2 and $1.80, respectively, based on a quantity of 1,000.

More detailed information on TI's isolation product portfolio
• Order ISO1540 Sample: www.ti.com/iso1540s-pr
• Order ISO1541 Sample: www.ti.com/iso1541s-pr
• Order ISO1540 EVM: www.ti.com/iso1540evms-pr
• Order SN6501 EVM: www.ti.com/sn6501evms-pr
• Latest blog post on signal chains: www.ti.com/analogwire-pr
• Download press release photos: www.ti.com/newscenterphotos-pr