Found 5 alternatives for FSA646UCX by onsemi. Interface Analog Switches Special Purpose — 36-UFBGA, WLCSP.
IC ANLG SWITCH 2:1 4LINE 36WLCSP
IC ANLG SWITCH 2:1 4LINE 36WLCSP
MIPI SWITCH U-WLB2424-36
ANALOG SWITCH 3V-5V U-WLB2424-36
IC SWITCH SPDT 36-WLCSP