PIC16F877A-I/L PIC16F877A-I/L 其他被动元件 PIC16F877A-I/LG PIC16F877A-I/LH PIC16F877A-I/ML PIC16F877AI/P PIC16F877A-I/P PIC16F877A-I/P IC PIC16F877A-I/PH PIC16F877A-I/PT