Octal switch features more than 8kV ESD protection
An Intersil product story
Edited by the Electronicstalk editorial team Jul 27, 2009
Intersil's ISL54230 octal switch can interconnect baseband chips, application processors, internal Sim cards and other support chips in full-featured smart phones.
The ISL54230's small size and flexibility allows designers to optimise the routing of the many different types of signals found in high-feature-set mobile phone products.
The ISL54230 has eight individual single pole double throw (SPDT) switches, whose performance has been carefully designed to enable them to pass a wide range of precision voice and data signals, including high-speed USB, UART, PCM, audio and power.
With the addition of simple logic control, the switches can be configured to multiplex between pairs of signals such as USB 2.0 high-speed ports, or between groups of signals such as Sim card clock, data and power lines.
To minimise board space, the signal pins on the ISL54230 have been arranged in a 'flow-through' manner to avoid signal crossovers on the PCB.
Unused switches can be powered down as required under logic control.
For dual-mode mobile phones, the ISL54230 allows dual baseband chips to access either of two Sim cards, while allowing the unused Sim card to be powered down in order to minimise battery drain.
All signal lines have greater than 8kV ESD protection allowing for much safer Sim card insertion and removal.
The devices have an operating temperature range of -40 to +85C.
The ISL54230 is available in a 36-bump 2.6mm x 2.6mm WLCSP package and in a 32-lead 5mm x 5mm TQFN package.
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