Intersil Rolls-Out New Octal Switch for High-End Cell Phone Applications

Analog and mixed-signal semiconductor developer Intersil Corporation has rolled-out a new octal switch in to the semiconductor market ideal for high-end cell phone applications, so called ISL54230.

 

Intersil's new octal switch, ISL54230, is a multi-protocol Quad Double-Pole Double-Throw (DPDT) analog switch that features eight individual SPDT (Single Pole Double Throw) switches configured into four DPDT blocks. The performance of these 8 SPDT switches has been designed to pass a wide range of precision voice and data signals, including high-speed USB, UART, PCM, audio and power. The solution features high-speed (480Mbps) and full-speed (12Mbps) signaling capability per USB 2.0.

 

The ISL54230 octal switch is also provided with a simple logic control, which facilitates the switches to be configured to multiplex between pairs of signals like USB 2.0 high-speed ports, or between groups of signals like SIM card clock, data and power lines. With the help of logic control, unused switches can be powered down as required.

 

Intersil said that it has arranged the signal pins on the ISL54230 solution in a flow-through manner in order to avoid signal crossovers on the PCB. This will also minimize board space. 

 

The Electrostatic discharge (ESD) capability of ISL54230 is greater than 8kV on all signal pins, says Intersil. This protects the solution against ESD damage caused by SIM card insertion and removal.

 

Apart from facilitating designers to optimize the routing of the different types of signals found in high-end cell phone products, ISL54230 is compliant with USB 2.0 short-circuit and over voltage requirements without additional external components

 

While using ISL54230 on dual-mode cell phones, it enables dual base-band chips to access either of two SIM cards while allowing the unused SIM card to be powered down, which will minimize battery drain. The 8kV ESD protection on signal lines helps in safer SIM card insertion and removal. Low-resistance switches have been provided for SIM card power line switching.

 

Available in a 36-bump 2.53mmx2.53mm WLCSP package at a price of $1.53 per 1000-unit quantities, ISL54230 requires 2.0V to 5.5V supply range. It also features rail-to-rail analog signal switching along with 1.8V logic compatible (2.7V to 3.6V supply). Its operating temperature ranges from -40 degrees C to +85 degrees C.

 

In addition, the dual output-enable controls have been provided for selective shutdown of switches when not in use. The switch terminals are over voltage protected up to +5.5V and features low switch leakage during power down.

 

The ISL54230 is also available in a 32-lead 5mmx5mm TQFN package for a price of $1.40 per 1000 units in tape-and-reel option.