Intersil : Low distortion stereo audio switch cures clicks and pops in MP3 players

Intersil has introduced the ISL54406, a highly integrated, ultra-low distortion stereo audio switch that eliminates unwanted clicks and pops typically caused by powering up and down, muting on and off, and switching between audio sources. The combination of audio performance and reduction in external components makes the ISL54406 the ideal choice for compact MP3 players, docking speaker systems, cell phones, portable DVD players and sound cards.

Superior audio performance is achieved on several levels. First, the ISL54406 delivers Total Harmonic Distortion (THD) of just 0.015 percent at 1mW into a 32-ohm load. The low THD switching path can be interrupted to provide >110dB of off-isolation for signal muting purposes into 32ohm or high impedance loads which are typical in consumer and automotive entertainment systems. Recovery from muting is instantaneous even with very large DC blocking capacitors.

This unique instant-on capability needs no timing capacitor and requires only 7microamps of supply current. The ISL54406 provides both active and standby modes of operation with the standby mode reducing the supply current to a maximum of 5nanoamps. This minimises current drain in devices such as portable MP3 players that are placed in a ‘hibernation’ mode when not in use.

The ISL54406’s comprehensive ‘click and pop’ elimination scheme effectively isolates low and high impedance loads from audio spikes and glitches and requires no external timing components to deal with DC blocking capacitors placed between the single supply codec and the load.

The ISL54406 is available now in 1.8mm x 1.4mm TQFN, 10 Ld 3 x 3 TDFN, and 10 Ld 3 x 3 TDFN T+R packages.

For more ISL54406 information:,1477,ISL54406.html

About Intersil’s Precision Analogue Switch Products

Intersil has a broad portfolio of analogue 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 analogue 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 MP3/USB 2.0 Voice and High Speed Data switches, the ISL54209 and ISL54213, designed for handheld applications.

To learn more about Intersil’s broad switching portfolio, visit Intersil’s Analogue Switches, Multiplexers and Crosspoint Switches page at

For further information and reader enquiries:

Intersil SA, Sandringham House, 110 Sandringham Avenue, Harlow, Essex, CM19 5QA
Tel: +44 (0)1279 630922
Fax: +44 (0)1279 630939

About Intersil

Intersil Corporation is a leader in the design and manufacture of high-performance analogue 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 analogue 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; analogue switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications.

Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.

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