News & Events
Intersil Introduces Ultra-Low-Resistance Dual Analog Switch in Tiny Chipscale Package

– ISL84684 is Housed in a 2.0mm x 1.5mm Space-Saving Package

MILPITAS, CA, November 21, 2005 – Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog solutions, today announced an ultra-low-resistance dual analog switch. The ISL84684 is a true bi-directional switch with less than 0.5 Ohms of resistance over the full input signal range for lower signal loss and lower distortion of midi and voice signals. This device is ultra-small for space-constrained applications in cellular phones and other handheld devices.

“Handheld devices increasingly incorporate new audio capabilities such as MP3 playback and FM radios that demand higher signal quality than traditional cellphone voice requirements,” said Chris Ludeman, marketing manager of Intersil’s Switch and MUX product group. “Intersil’s ISL84684 has significantly lower Ron (on resistance) and THD (total harmonic distortion) at low supply voltages to readily meet customer needs.”

Low Distortion, Small Size and Expanded Supply Voltage Range
Intersil’s ISL84684 is a low ON-resistance, low voltage, bi-directional, dual single-pole/double-throw (SPDT) analog switch designed for minimal distortion to signals in the audio range. With a signal-to-distortion figure of 78dB, the ISL84684 will not compromise MP3 or FM radio performance.

Cellular phone designers often face the need for rapid feature addition for new markets or customers. The number of analog input pins on baseband chipset devices may be limited and digital geometries may not be well suited for optimal analog performance. In such instances, the ISL84684 may be used to “mux-in” additional functionality such as MP3 playback and FM radio, while reducing design risk and occupying minimal additional board area. It consists of two normally open (NO) and two normally closed (NC) switches. This configuration can be used as a dual 2-to-1 multiplexer.

The ISL84684 has a single +1.8V to +4.5V supply that allows the device to operate from 2-cell NiMH or alkaline batteries and directly off a single-cell Li-Ion battery for a larger signal output range. The digital logic input is 1.8V logic-compatible over the full supply range.

Key Features

• ON resistance at V+ = +2.7V of 0.21 Ohms
• Total harmonic distortion of 0.012% (-78dB) for 2Vpp into 32 Ohms
• Ron matching between channels, maximum of 0.05 Ohms
• Ron flatness across signal range, max of 0.03 Ohms
• Single supply operation of +1.8V to +4.5V
• 1.8V logic-compatible over the full supply range

Target Applications

• Battery-powered, handheld and portable equipment
  • Cellular phones
  • Pagers
  • Laptops, notebooks, palmtops
• Portable test and measurement
• Medical equipment
• Audio and video switching

About Intersil’s Precision Analog Switch Products
Intersil has a broad portfolio of analog switches that provide excellent performance across the entire input voltage range. Each new device incorporates more than 30 years of market experience into its design. Precision analog switches and MUXs from Intersil meet today's design challenges for low-voltage, low on-resistance and smaller packaging. Intersil leads in technology innovation with the industry's lowest-distortion and highest-ESD sub-0.5 Ohm analog switches, the ISL8484 and ISL8499, designed for handheld applications. To learn more about Intersil’s broad switching portfolio, visit Intersil’s Analog Switches, Multiplexers and Crosspoint Switches page at http://www.intersil.com/switchmux/.

Pricing and Availability
The ISL84684 is available now in a 12-bump 2.0mm x 1.5mm package and is priced at $1.12 in 1,000-unit quantities. More information on the ISL84684 is available at http://www.intersil.com/cda/deviceinfo/0,1477,ISL84684,0.html. To view a broad range of application block diagrams, visit Intersil’s Application Design Center at http://www.intersil.com/apps.

Note to editors: To view a high-resolution downloadable photo of the ISL84684, visit Intersil’s photo room at: http://www.intersil.com/pressroom/photoarchives.asp. About Intersil
Intersil Corporation, a NASDAQ 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company’s products address three of the industry’s fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, 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 rad-hard 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 www.intersil.com.

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