(=> (Maximum-Operating-Supply-Voltage $X $Y) (Voltage-Quantity $Y))
(=> (Maximum-Operating-Supply-Voltage $X $Y) (Semiconductor $X))
(Maximum-Operating-Supply-Voltage Lm383-7-Watt-Audio-Power-Amplifier
(* 20 Volt))
(Maximum-Operating-Supply-Voltage Lm383a-7-Watt-Audio-Amplifier
(* 20 Volt))