STC89C52RC-25-I-PQJ STC89C52RC-40 STC89C52RC-40C STC89C52RC-40C-LQFP44 STC89C52RC-40C-LQFP44G STC89C52RC-40C-P STC89C52RC40C-P STC89C52RC-40C-PDI STC89C52RC-40C-PDIP STC89C52RC-40C-PDIP40