STC89C52RC-40I-PDIP40 @@@@@@@ STC89C52RC-40I-PDIP-LQFP STC89C52RC-40I-PLCC STC89C52RC-40I-PLCC44 STC89C52RC-40I-PLCC44 工控元件 STC89C52RC-40I-PQFP STC89C52RC-40I-PQFP4 STC89C52RC-40I-PQFP44 STC89C52RC-40I-PQFP44G STC89C52RC-40I-QFP