Single Transmitters feature ±16.5 kV ESD protection.

Press Release Summary:

Powered by 3.3 V, ISL329xE Series RS-485/RS-422 Transmitters are available in 250 Kbps, 500 Kbps, and 20 Mbps models. All devices feature Tx enable pin that places IC in low power shutdown mode to minimize power consumption whenever transmitter is disabled. In addition to SOT23 package options, transmitters are available in 8-lead TDFN packaging with level translators on enable and data input pins that facilitate design of mixed voltage systems.

Original Press Release:

Intersil's Ultra-small RS-485/RS-422 Single Transmitter Offers Rugged Performance and Best-in-Class Internal ESD Protection

- ISL329xE Series Provides World's Best Power-Efficiency and ESD Protection (16.5kV IEC61000 on Outputs) While Offering Greater Design Flexibility Through an Integrated VLOGIC Pin

MILPITAS, CA, October 22, 2007 - Intersil Corporation (NASDAQ Global Select: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, today announced the ISL329xE series of 3.3V-powered RS-485/RS-422 single transmitters designed with excellent +/-16.5kV ESD protection and ultra-low supply current requirement. These devices come in very small TDFN and SOT23 packages with both package types available in the industrial and extended industrial (-40C to +125C) temperature ranges.

This single transmitter family offers data rate options to match the application speed. For low-speed applications, the family offers slew rate-limited versions at 250kbps (ISL3293E and ISL3296E), as well as 500kbps versions (ISL3294E and ISL3297E). The ISL3295E and ISL3298E operate up to 20Mbps for high-speed applications.

This family of transmitters has low quiescent supply current (Icc = 150 microamps max) that is 1/30th the value of the nearest competitor, making a significant improvement in power critical applications. Additionally, all the devices feature a Tx enable pin that places the IC in a low power shutdown mode (Icc = 1 microamps max) to further reduce power consumption whenever the transmitter is disabled.

The ISL3296E, ISL3297E and ISL3298E are all available in 8-lead TDFN packaging (2mm x 3mm) that are 26% smaller than SOT23 package options (3mm x 3mm), saving valuable board space. These versions feature on-board level translators on the enable and data input pins that simplify the design of mixed voltage systems. The logic supply pin (VL) can be connected to a lower voltage processor supply to level shift the input voltages to values compatible with the processor supply. This eliminates the need for external level translators.

The rugged performance of these devices is demonstrated by the high level of ESD protection on the transmitter outputs that are typically exposed to the outside world, as well as the 125C temperature operating range and enhanced thermal performance of the TDFN package option.

Coupled with the ISL328xE family of single RS-485/RS-422 receivers, a user can build a small footprint, highly reliable serial communication port.

Pricing and Availability
The ISL3293E, ISL3294E and ISL3295E are available in SOT23 packaging in 1,000 unit quantities for $1.20 for the extended industrial temperature grade and $0.87 for industrial temperature grade.

The ISL3296E, ISL3297E and ISL3298E are available in TDFN packaging in 1,000 unit quantities for $1.20 for the extended industrial temperature grade and $0.87 for industrial temperature grade.

For more information on the ISL329xE family of ultra-small, low-power transmitters go to

For more information on the ISL328xE family of ultra-small, low-power receivers go to

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

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