High-speed voice and data switches from Intersil

20th January 2009
ES Admin
Intersil has introduced the ISL54210 and ISL54211, highly-integrated devices that extend Intersil’s leadership position in compact, high-performance mixed audio and data switches. The ISL54210 and ISL54211 combine superior low distortion performance, high-speed USB 2.0 data rates and use the industry’s most effective suppression technology to eliminate clicks and pops in handheld devices.
The new switches integrate Intersil’s MP3/USB 2.0 high-speed data interconnect and ultra low distortion audio switching technology along with advanced ‘click/pop’ elimination circuitry in a tiny micro TQFN package. The device allows audio and data paths in small handheld products such as MP3 players and smart phones to share a common mini-jack or mini-USB connector, freeing up connector pins for other functions or eliminating the need for additional connectors. Incorporating USB 2.0 high speed interconnect capability shortens digital audio file download and synchronization times, while a high off-isolation mute mode eliminates annoying clicks and pops during power up and power down. These features enable the ISL54210 and ISL54211 to deliver a low cost, compact solution for congested connectors in handheld products such as MP3 players and cell phones, as well as docking stations.

The ISL54210 is optimised for powering off an LDO regulator and includes circuitry for the detection of the USB VBUS voltage, which is used to switch between the audio and USB signal sources. The ISL54211 can operate off a Lithium Ion battery supply, and has logic control pins that are 1.8V logic compatible, allowing for direct control via a standard microcontroller.

The ISL54210 and ISL54211 are available now in 1.8mm x 1.4mm x .50 μTQFN, 10 Ld 3 x 3 TDFN, and 10 Ld 3 x 3 TDFN T+R packages.

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