The ST490A is a low power transceiver for RS485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST490A draws 5mA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5V 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.
|DS2962: Low power high speed RS-485/RS-422 transceiver||5.2||686 KB|
|AN1348: ST485: an RS-485 based interface with lower data bit errors||3.2||112 KB|
|スマート･インダストリ向け 製品 & ソリューション ガイド||3.1||3 MB|
|製品型番||パッケージ||Packing Type||Operating Temperature (°C) (min)||Operating Temperature (°C) (max)||Autoshutdown||Marketing Status||Unit Price (US$) *||数量||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|ST490ABDR||SO-8||Tape And Reel||-40||85||-||Active : Product is in volume production||1.01||1000||EAR99||CHINA||MORE INFO||DISTRIBUTOR AVAILABILITY|
|製品型番||Marketing Status||パッケージ||Grade||RoHS Compliance Grade||Material Declaration**|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.