NXP offers Multiple Switch Detection Interface Devices. The MC33975 Multiple Switch Detection Interface with Suppressed Wake-up is designed to detect the closing and opening of up to 22 switch
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MC34975, Multiple Switch Detection Interface with Suppressed Wake-up and 32 mA Wetting Current - Fact Sheet
NXP offers Multiple Switch Detection Interface Devices. The MC33975 Multiple Switch Detection Interface with Suppressed Wake-up is designed to detect the closing and opening of up to 22 switch