FSA550 Datasheet | Fairchild Semiconductor

- 4PST Depletion Mode Isolation Switch November 2014 FSA550 4PST Depletion Mode Isolation Switch Features - 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, Ro HS pliant, Halogen Free Applications - MP3 Portable Media Players - Cellular Phones, Smart Phones Description 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. The FSA550 operates on a wide VCC range for design flexibility. Additionally, select pins allow the internal oscillator frequency to be adjusted between 500 k Hz and 750 k Hz in 75 k Hz steps when VCC is present. This feature is used to shift the electromagnetic interference (EMI) signature to meet customer specifications. Related Resources - FSA550 Evaluation Board L_SPKR R_SPKR Control IC Gnd Vcc Left Speaker Right Speaker Noise Canceling Typical Application Ordering Information Part Number Top...