PCF80C31BH-3-16P PCF80C31BH-316WP PCF80C31BH-3-16WP PCF80C31BH-3-16WP内存芯片 PCF80C31BH-424P PCF80C31BH-4-24P PCF80C31BH-4-24P/0 PCF80C31BH-4-24WP PCF80C39 PCF80C39-11WP