BUY ISQ202 https://www.utsource.net/itm/p/162407.html
DC-IN 4-CH Transistor DC-OUT 16-Pin PDIP
Description: The ISQ202 is a high-speed, low-power, quad-channel, optically-isolated, digital input module. Features: High-speed, low-power operation Quad-channel, optically-isolated digital inputs TTL compatible logic levels Wide operating temperature range Short-circuit protection Low power consumption High common-mode transient immunity Application: The ISQ202 is suitable for use in industrial and commercial applications such as motor control, process control, and factory automation. It can also be used in medical and automotive applications. (For reference only)