SOURCE: Intersil

December 17, 2007 17:29 ET

World's Fastest RS-485/RS-422 Transceiver Gives Best-in-Class ESD Protection

The ISL3259E 100Mbps Data Transfer Rate Doubles the Currently Available Data Rates While Providing IEC61000 ESD Protection in a Space-Saving 3mm x 3mm Package

MILPITAS, CA--(Marketwire - December 17, 2007) - Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, today introduced the ISL3259E RS-485/RS-422 transceiver, a next-generation interface IC that combines the industry's fastest data transmission rate (100Mbps) with an incredibly low 2.6mA supply current and rugged 15kV IEC61000-4-2 ESD (electro-static discharge) protection.

In achieving a data rate more than double that of competing devices, the ISL3259E allows manufacturers to design the most dependable high data rate systems ever created, giving unprecedented precision control in factory automation applications or doubling the throughput in applications requiring large data transfers.

The majority of higher-end RS-485/RS-422 transceivers are limited to data rates up to 40Mbps. Precision control of motor positioning in factory automation systems requires high speed data transfers. With its 100Mbps data rate, clearly the ISL3259E leads the way.

In addition, the ISL3259E integrates ESD protection that is between 33% and 100% greater than the ESD ratings of other very high speed transceivers in the marketplace. This allows for the elimination of external protection components and saves on total costs. This device's stellar ESD level is rated at 15kV air gap and 8kV contact discharge to IEC61000-4-2 on the RS-485/RS-422 bus pins and 9kV HBM on all of the other pins.

The ISL3259E has enhanced output differential voltage drive (Vod). The transceiver Vod is specified to be 40% greater then the voltage specified by the RS-485 protocol. This enhancement and rugged features make the ISL3259E an ideal fit for factory automation applications. Other applications also profit from the increased noise immunity and enhanced data integrity provided by the extra large Vod. Parallel networks, like SCSI "fast 40" systems, benefit from the 100Mbps data rate and the low transceiver and receiver skews, as well as the 4nS part-to-part skews. In addition, the receiver outputs deliver superior low state currents (typically > 30mA at Vol = 1V) to ease the design of optically-coupled, isolated networks.

To round out the robust performance elements of the ISL3259E, the device also has a full fail-safe receiver, current limiting and thermal shutdown for driver overload protection, and hot plug transmitter and receiver outputs. These features protect the ISL3259E outputs and prevent data corruption when cable faults occur or when a new node is added to an active bus. This means systems will have enhanced data integrity and will be more rugged when using the ISL3259E.

In addition to these enhanced performance benefits, the ISL3259E is packaged in a small 3mm x 3mm DFN package for space-savings along with an 8 lead MSOP package option. The tiny package has a 70% smaller PCB footprint than standard 8-lead SOIC offerings and an integrated thermal slug provides approximately a 40% improvement in thermal resistance compared to the SOIC package.

Pricing and Availability

The ISL3259E is available in DFN and MSOP packaging in 1,000 unit quantities for $1.33 each.

For more information on the ISL3259E fast, reliable transceiver go to,1477,ISL3259E,0.html

Note to editors: To view a high-resolution downloadable photo of ISL3259E, visit Intersil's photo room at:

About Intersil's Interface Portfolio

Intersil offers a wide range of RS-232, RS-485/RS-422, and Multi-Protocol transceivers. The RS-232 family of devices operates off of 3.3V or 5V supplies, has many combinations of transmitter and receiver configurations and is protected to IEC61000 ESD specification. The RS-485 family of devices comes in 3.3V or 5V supply operation, support full/half duplex modes with many speed grades to chose from and the devices are protected to 15kV HBM ESD. To learn more, visit Intersil's Interface Website at

About Intersil

Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, other handheld systems, and notebooks. Intersil's product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-swap and hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, switching DC/DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high-performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at

Contact Information

  • Media Contact
    Rob Purdie
    Senior Marketing Representative
    Intersil Corporation
    (321) 724-7688