The TD3022 consists of a single input LED optically coupled to a random-phase traic driver. The TD3022 provides high input-to-output isolation and is designed to drive high-powered triacs. Typical uses include interfacing logic level control signals to equipment powered from 110Vac and 220Vac lines controlling resistive and inductive loads.

The AD4C311 is a bi-directional, double-pole, single-throw, normally open multipurpose solid-state relay. It is designed to replace electromechanical relays in general purpose switching applications. The relay consists two integrated circuits, each driving a pair of rugged source-to-source enhancement type DMOS transistors.

The SP646 is a bi-directional, single-pole, single-throw, normally open multipurpose relay. The circuit is composed of one LED on the input side which activates an optically coupled IC on the output-controlling the firing angle of two back-to-back SCRs.

The SDD450 consists of a Photo Darlington transistor optically coupled to a light emitting diode. Optical coupling between the input LED and output Photo Darlington allows for high isolation levels while maintaining low-level DC signal control capability.

The S211 is a single-pole, double-throw, normally open, SCR output device. The circuits are composed of one LED on the input side which activates an optically coupled IC on the output-controlling the firing angle of two back-to-back SCRs.

The primary function of a modem data access arrangement (DAA) is to provide a path for the transmission of data from a high-voltage tip-to-ring phone line through an isolation barrier (typically 1500 VAC) into the modem for further processing.