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https://www.mornsun-power.com/html/news-detail/product-news/179.html

Mornsun launched a new half-duplex transceiver SCM3402ASI(+3.3V voltage supply), as an extention of SCM3401BFA(+5V voltage supply). Designed for the RS-485 network, the new transceiver SCM3402ASI is fully compliant with TIA/EIA-485A standards. 
The SCM3402ASI transceiver contains a driver and a receiver, both of which can be independently enabled and disabled. When both are disabled, the driver and the receiver output a high-impedance state.
With a 1/8 load, the SCM3402ASI transceiver allows up to 256 transceivers on a Bus to achieve up to 12Mbps error-free data transmission. Its operating voltage range is 3.0-3.6V, and protections include fail-safe, over-temperature, limiting current and over current.
Applications of RS-485 Transceiver  - SCM3402ASI
Widely used in applications of industrial automation, building automation, smart electricity meters, remote signal interaction, transmission, etc.
Features of RS-485 Transceiver  - SCM3402ASI
●  3.3V voltages supply, half-duplex
●  1/8 unit load, allowing up to 256 transceivers on the Bus
●  Transmission rate up to 12Mbps in an electrical noise environment
●  Driver output short-circuit protection
●  Over temperature protection 
●  Low power shutdown function
●  Receiver open circuit protection
●  Strong anti-noise ability
●  Integrated transient voltage resistance function

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