The Toshiba Transistor Output Optocoupler TLP292-4(GB,E is a 4 channel transistor output optocoupler designed for signal isolation, noise suppression, and AC/DC coupling. It enables signal transmission between two circuits with different potentials while preventing interference from external disturbances. The TLP292-4(GB,E provides high-speed switching, low distortion, low power consumption, and high isolation voltage. The package integrates a high-efficiency GaAs infrared light-emitting diode (LED), a photo transistor, and a reinforcing cable with a converter. The converter isolates the LED and the photo transistor from the exterior, allowing the LED to be driven at a constant voltage. It also provides a higher DC gain compared to previous optocouplers.