芯片手册sp3485具有10mbps数据速率3 3 v低功耗半双工rs.pdfVIP

SP3481/SP3485 +3.3V Low Power Half-Duplex RS-485 Transceivers with 10Mbps Data Rate ■RS-485 and RS-422 Transceivers ■Operates from a single +3.3V supply ■Interoperable with +5.0V logic ■Driver/Receiver Enable ■Low Power Shutdown Mode (SP3481) ■-7V to +12V Common-Mode Input Voltage Range ■Allows up to 32 transceivers on the serial bus ■Compatibility with the industry standard 75176 pinout ■Driver Output Short-Circuit Protection DESCRIPTION The SP3481 and the SP3485 are a family of +3.3V low power half-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to- pin compatible with the Sipex SP481, SP483, and SP485 devices as well as popular industry standards. The SP3481 and the SP3485 feature Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The SP3481 and SP3485 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3481 is equipped with a low power Shutdown mode. RO 1 R 8 Vcc RE 2 7 B DE 3 6 A DI 4 D 5 GND SP3481 and SP3485 10/15/02 SP3481/3485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V