c280 9bit odd/even generator 奇偶发生器74hc283 4bit binary adder carry 四位加法器74hc299 3-state universal shift 三态移位寄存74hc30 8-input nand gate 8输入端与非门74hc00 quad 2-input or gate 四个双端或门74hc34 non-inverter 非反向器74hc354 8-ch 3-state mux 8路3态多路器74hc356 8-ch 3-state mux 8路3态多路器74hc365 hex 3-state buffer 六个三态缓冲门74hc366 3-state buffer inverter 缓冲反向器74hc367 3-state buffer inverter 缓冲反向器74hc368 3-state buffer inverter 缓冲反向器74hc373 3-state octal d latches 三态d型锁存器74hc374 3-state octal d flipflop