ADI ADM4850ARZ

ТрансиверRS422, RS485115 кбит/с

Overview

The ADM4850ARZ is a Differential Line Transceiver for high speed half-duplex data communication on multipoint bus transmission lines. It is designed for balanced data transmission and complies with EIA Standards RS-485 and RS-422. It shares differential lines and have separate enable inputs for the driver and receiver. The device has a 1/8-unit load receiver input impedance, which allows up to 256 transceivers on one bus. Because only one driver must be enabled at any time, the output of a disabled or powered down driver is 3-stated to avoid overloading the bus. The receiver inputs have a true fail-safe feature, which ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when communication ends. The driver outputs are slew rate limited to reduce EMI and data errors caused by reflections from improperly terminated buses.

Features

Applications

• Remote controls
• Wireless network systems
• Satellite communications networks
• Ethernet circuitry
• Wired telephone
• Cordless telephone
• Desktop PC
• Notebook
• Pocket PC
• Desktop radio