Original question:
TS5A3159: What happens if pin 6 is left floating while powered on
Dear TI Experts,
My customer need an analog switch in a BT earphone project, when battery is no power, auido sigal need pass COM to NC, so this requirment may need switch keep low resistance between COM and NC even when V+=0V. Is this possible for TS5A3159? If not, is there any other suggestion for this function? Thanks a lot. This fuction is required on many battery powered earphone, such as BT earphone, ANC headset, etc.
Bruce,
No, the COM and NC connection for the TS5A3159 device is not defined with V+ = 0V so you cannot guarantee the signal path high or low impedance.
The TS53159A has the back power protection feature the defines the connection COM to NC as HI-Z when V+ = 0V
The switches and multiplexers FAQ page states TI currently doesn't have depletion FET switches which would guarantee a low impedance path with V+ = 0V.
Thank you,
Adam
