STMicro analog switches fit smart mobile phones

STMicroelectronics has introduced a pair of SPDT analog switches whose packaging and low insertion losses make them suitable for use in consumer products such as audio and video devices, cellphones, notebook PCs, and PDAs.

The STG3699 is a quad SPDT analog switch and the STG3684 is a dual SPDT analog switch. The products include multiple "Single Pole Dual Trough" cells and can work in bi-directional mode, using 1.8V compatible digital control pins. The switches are housed in a QFN package that measures 3-by-3mm.

The on-resistance of the devices is <0.5 ohms. This reduces distortion to a minimum in audio circuits, ensuring high-fidelity signal routing for products such as cellphones. The product's low on-resistance also means low insertion losses in video applications. Switching times are <300ps.

The parts operate between 1.65V and 3.6V, are designed to support high current up to ±500mA 10 percent duty cycle, and consume <1mA power. All inputs, outputs are protected against static discharge and transient excess voltages.