微功耗rs485中继器的研制 引 言: 在通信距离为几十米到上千米时,rs485收发器被广泛使用。rs485收发器采用平衡发送和差分接收,因此具有抑制共模干扰的能力,加上接收器具有高的灵敏度,能检测低达200 mv的电压,故传输信号能在千米以外得到恢复。 2N3904 MMBT390 4. MMPQ390 4 PZT3904. NPN General Purpose Amplifier. This device is designed as a general purpose amplif ier and switch. The useful dynamic range extends to 100 mA as a swi tch and to. 100 MHz as an amplifier. Sourced from Process 23.

Wavecom Q2303a / Q2406a / Q2406b Gsm / Gprs Modem , Find Complete Details about Wavecom Q2303a / Q2406a / Q2406b Gsm / Gprs Modem,Wavecom Gsm Modem Driver,Gsm Modem Wavecom,Wavecom Q2403a Gsm Modem For Rs232 from Modems Supplier or Manufacturer-Shenzhen Hurryup Technology Co., Ltd. wavecom q2406b datasheet 2010-01-27 上传 大小:923KB 所需: 3 积分/C币 立即下载 最低0.43元/次 学生认证会员7折 举报 收藏 (1) NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. Absolute Maximum Ratings* T A = 25°C unless otherwise noted