6N137
Overview
The 6N137 is a high-speed, 10MBd single-channel optocoupler featuring an open-collector logic output and an internal Faraday shield for high common-mode rejection. It provides reliable galvanic isolation up to 5000Vrms, making it suitable for bridging different ground potentials in high-speed digital systems. The device is designed to interface directly with TTL, LSTTL, and CMOS logic levels while operating on a standard 5V supply.
Why Choose This Part
It offers a very high common-mode transient immunity (CMTI) of 10kV/us, which is essential for maintaining data integrity in electrically noisy environments. The open-collector output allows for easy level shifting and can sink up to 50mA, providing flexibility when driving various logic families or small relays.
Applications
Key Specifications
Getting Started
To use the 6N137, provide a regulated 5V to 7V supply to the VCC pin and connect a bypass capacitor close to the power pins to filter high-frequency noise. A pull-up resistor is required on the open-collector output pin to define the high-state voltage level, typically sized between 330 ohms and 4k ohms depending on the desired speed and power consumption. Ensure the input LED current is restricted using a series resistor to meet the recommended forward current specifications.
