FSA550BUCX

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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 Applications   The FSA550 operates on a wide VCC range for design flexibility. Additionally, select pins allow the internal oscillator frequency to be adjusted between 500 kHz and 750 kHz in 75 kHz 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 MP3 Portable Media Players Cellular Phones, Smart Phones FSA550 Left Speaker L_SPKR R_SPKR GND Right Speaker Control IC Gnd Vcc Noise Canceling IC Typical Application Ordering Information Part Number Top Mark Operating Temperature Range Package Packing Method FSA550UCX M4 -40 to +85°C 12-Ball WLCSP, 3 x 4 Array, 0.4 mm Pitch, 250 µm Ball 3000 Units on Tape and Reel FSA550BUCX M4 -40 to +85°C 12-Ball WLCSP(with Backside Laminate), 3 x 4 Array, 0.4 mm Pitch, 250 µm Ball 3000 Units on Tape and Reel © 2011 Fairchild Semiconductor Corporation FSA550 • Rev. 1.0.1 www.fairchildsemi.com FSA550 — 4PST Depletion Mode Isolation Switch November 2014 FSA550 — 4PST Depletion Mode Isolation Switch Pin Configuration 1 2 3 A0 VCC B0 A A1 SEL0 B1 B A2 SEL1 B2 C A3 GND B3 D 1.6mm Figure 1. 1.2mm 12 Ball WL-CSP Top View Pin Assignment (Top Through View) Pin Descriptions Pin # Name Type A1 A0 I/O A - Port B1 A1 I/O A - Port C1 A2 I/O A - Port D1 A3 I/O A - Port A2 VCC Supply / Control B2 SEL0 Input C2 SEL1 Input D2 GND Ground A3 B0 I/O B - Port B3 B1 I/O B - Port C3 B2 I/O B - Port D3 B3 I/O B - Port Table 1. Table 2. Description 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 Truth Table VCC Function 0 V – 0.2 V B0-B3 = A0-A3 1.6 V - 3.0 V Disconnect; B0-B3 ≠ A0-A3 Oscillator Frequency Step Logic SEL1 SEL0 Frequency (Typ.) LOW LOW 500 kHz LOW HIGH 575 kHz HIGH LOW 650 kHz HIGH HIGH 725 kHz © 2011 Fairchild Semiconductor Corporation FSA550 • Rev. 1.0.1 www.fairchildsemi.com 2 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. Symbol Parameter VCC Supply/Control Voltage VIN Input Voltage (Select Pins) VSW(ON) VSW(OFF) (1) DC Switch I/O Voltage (Switch Conducting) VCC=0 V DC Switch I/O Voltage (Switch Isolated) VCC=Powered Min. Max. Unit 0 4.6 V 0 VCC V -4 +4 V -0.5 3.0 V IIK DC Input Diode Current ISW Switch I/O Current VCC=0 V (Switch Conducting) 350 mA Peak Switch Current Pulsed at 1 ms Duration,