积分:0分 关键词:周立功单片机, 智能型, +3.0V, +5.5V, RS-232, 收发器, SP3238E
积分:0分 关键词:Sipex, WAN, Multi-Mode , 5V, Single Chip, Serial Transceiver, SP506
积分:0分 关键词:WAN, Multi-Mode , Serial Transceiver,+5V, Single Chip, SP507
积分:0分 关键词:3V,5V,数据手册