器件名称:
ST485AB_07
功能描述:
Very high speed low power RS-485/RS-422 transceiver
文件大小:
717.61KB 共19页
简 介:
ST485AB Very high speed low power RS-485/RS-422 transceiver Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Low supply current: 5 mA max High data rate > 30 Mbps Designed for RS 485 interface applications -7 to 12 common mode input voltage range Driver maintains high impedance in 3-state or with the power off 70mV typical input hysteresis Operate from single 5 supply ±4 kV ESD protection Current limiting and thermal shutdown for driver overload protection Latch-up free up to 500 mA The ST485A is designed for bi-directional data communications or multipoint bus transmission lines. DIP-8 SO-8 Description The ST485A is a low power, high speed transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration. The ST485A draws 3 mA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5 V supply. Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that place the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic high output if both inputs are open circuit. Table 1. Device summary Temperature range -40 to 85 °C -40 to 85 °C Package DIP-8 SO-8 (Tape & reel) Rev. 3 Packaging 50parts per tube / 40tube per box 2500 parts per reel 1/19 www.st.com 19 Order code ST485ABN ST485ABDR August 2007 Contents ST485AB Contents 1 2 3 4 5 6 7 Pin configuration . . . . . .……
