The FSA839 is a high-performance Single-Pole / Double-Throw (SPDT) analog switch for audio applications driven by low voltage (1.8V) baseband processors or ASICs. The device features ultra-low RON of 0.8Ω (maximum) at 4.5V VCC and operates over the wide VCC range of 1.65V to 5.5V. The device is fabricated with sub-micron CMOS technology to achieve fast switching speeds and is designed for break-before-make operation. The FSA839 interfaces between the low-voltage ASIC and regular audio amplifiers and CODECs operating up to a 5.5V supply range. The control circuitry allows for 1.8V (typical) signals on the control pin (Sel).
Power-Off Isolation (VCC=0V)
0.8Ω Maximum On Resistance (RON ) for 4.5V VCC
0.25Ω Maximum RON Flatness for 4.5V VCC
Broad VCC Operating Range: 1.65V to 5.5V
Fast Turn-On and Turn-Off Times
Control Input Switching Thresholds Independent of VCC