Tuesday, June 16, 2009

Intersil Unveils Flexible ISL54230 Octal Switch

Intersil has introduced the ISL54230 Octal switch, which is suitable for high-end Smartphone applications. The ISL54230's small size and flexible design enable designers to optimise the routing of the many different types of signals in dual-mode, dual-standby operation phones. It is a quad double-pole/double-throw (DPDT) analogue switch that can operate from a single +2.0V to +5.5V supply.

It contains eight single-pole/double-throw (SPDT) switches configured into four DPDT blocks. Each DPDT block is independently controlled by a logic input signal. This flexible configurability provides switching and routing of USB, UART, PCM for Bluetooth Phy, SIM power/data and audio signals between internal chips and external connector pins.

In particular, the ISL54230 allows dual-baseband chips to access either of two SIM cards while allowing the unused SIM card to be powered down into a zero-power-consumption condition. Dual USB 2.0 high-speed 2:1 multiplexers provide USB connector access to multiple baseband and multimedia processor chips. To enable SIM card supply line switching, the ISL54230 includes a pair of 1ohm switches.

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