The FSA5157 is a low on resistance, low-power, Single Pole Double Throw (SPDT) analog switch. This product has been designed for switching audio signals in applications such as cell phones and portable media players. The ultra-low 0.4W impedance, sub 1µA current consumption, and 1.65V to 4.3V operating voltage range makes this product ideal for battery-powered applications. The FSA5157 also features bi-directional operation and break-before-make functionality. This device is fully specified for operation at 1.8V, 2.5V and 3.3V.

A growing number of applications require the voltage applied to the select input to be lower than the V_CC applied. Under this condition, most switches would typically consume over 100µA of current. This would be an unacceptable level for battery-powered applications. The FSA5157 is designed to minimize current consumption under this condition. The I_CCT is specified for <12µA under a worst-case condition of V_CC = 4.3V and V_IN = 1.8V.

• Typical 0.4W On Resistance (R_ON) for +2.7V Supply
• FSA5157 Features Less than 12µA I_CCT Current When S Input is Lower than V_CC
• 0.25W Maximum R_ON Flatness for +2.7V Supply
• 1.0mm x 1.45mm 6-Lead MicroPak™ Package
• Broad V_CC Operating Range: 1.65V to 4.3V
• Low THD (0.02% Typical for 32W Load)
• High-Current Handling Capability (350mA Continuous Current Under 3.3V Supply)
• Control Logic is 1.8V CMOS Logic Compatible

• Cellular Phone
• PDA
• Portable Media Player