N87C51RA24IC MCU 8BIT 8K 24MHZ OTP 44-PLCC|INTEL||RoHS Mixed EE87C51RA24 TN87C51RA1IC MCU 8BIT 8K 16MHZ OTP 44-PLCC|INTEL||RoHS Mixed EN87C51RA1 N87C51RA1IC MCU 8BIT 8K 16MHZ OTP 44-PLCC|INTEL||RoHS Mixed EE87C51RA1