Found 7 alternatives for SP721APP by Littelfuse Inc.. Tvs Mixed Technology — 8-DIP (0.300", 7.62mm).
IC HEX CLAMPING CIRCUIT 8-DIP
TVS ARRAY ESD 6 INPUT 30V 8-DIP
IC HEX CLAMPING CIRCUITS 8-DIP
IC DUAL USB PORT TVS 8-DIP
IC DUAL USB PORT TVS 8-DIP
IC HEX CLAMPING CIRCUIT 8-DIP
IC CIRCUIT PROT SIGNAL-LINE 8DIP