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FSA550 4PST Depletion Mode Isolation Switch Features The FSA550 is a high-performance four-pole singlethrow (4PST) normally closed Depletion-Mode isolation switch. The Depletion Mode technology allows the device to conduct signals when there is no VCC available and to isolate the signals when VCC is present. 4PST (NC) Depletion Mode MOSFETs Audio Frequency Range VCC(OFF): 1.6 V to 3.0 V RON: 0.8 Ω Typical RON Flat: 0.01 Ω Typical THD+N: 0.002% Typical Eco Status: Fairchild Green, RoHS Compliant, Halogen Free The FSA550 operates on a wide VCC range for design flexibility. Additionally, select...

FSA550 — 4PST Depletion Mode Isolation Switch 1.2mm 12 Ball WL-CSP Top View Pin Assignment (Top Through View) Supply / Control Isolation Circuit Supply Voltage (see Table 1) Oscillator Frequency Control (see Table 2). Used to shift the electromagnetic interference (EMI) signature to meet the customer specifications. System Ground Oscillator Frequency Step Logic SEL1 © 2011 Fairchild Semiconductor Corporation FSA550 • Rev. 1.0.1

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Supply/Control Voltage Input Voltage (Select Pins) VSW(ON) VSW(OFF) DC Switch I/O Voltage (Switch Conducting) DC Switch I/O Voltage (Switch Isolated) DC Input Diode Current Peak Switch Current Pulsed at 1 ms Duration,...

Typical values at TA = 25°C unless otherwise specified. Switch-to-GND Leakage Current (Switch Conducting) Switch-to-GND Leakage Current (Switch Isolated) Quiescent Supply Current Input Voltage High (Select Pins) Input Voltage Low (Select Pins) Input Leakage Current (Select Pins) Notes: 2. Guaranteed by test and characterization. 3. Voltages on select control pins must be ≤ VCC. AC Electrical Characteristics Typical values at TA = 25°C unless otherwise specified. Turn-Off Time VCC to Output Turn-On Time VCC to Output Total Harmonic Distortion + Noise Notes: 4. SEL0=SEL1=LOW. 5. Guaranteed by characterization....

© 2011 Fairchild Semiconductor Corporation FSA550 • Rev. 1.0.1 FSA550 — 4PST Depletion Mode Isolation Switch Product-Specific Dimensio

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability...