BUY EM311 https://www.utsource.net/itm/p/9225036.html

The EM311 is a 8-pin DIP (Dual Inline Package) integrated circuit manufactured by Fairchild Semiconductor. It is a low-power, high-speed, CMOS logic device used for data transmission and reception. The EM311 is a differential line receiver designed to provide high-speed data transmission over long distances. It features a low power consumption of only 0.5 mW and a high speed of up to 250 Mbps. The EM311 also has a wide common-mode input voltage range of -7V to +12V, making it suitable for use in a variety of applications. The EM311 is commonly used in applications such as data communications, industrial automation, and medical instrumentation. It is also used in high-speed data transmission systems, such as Ethernet and Fibre Channel. (For reference only)