The Vishay Siliconix DG202CSE-T is a quad SPST analog switch — four independent single-pole, single-throw switches on one die. It routes or blocks analog signals up to the supply rails, commonly used in audio routing, data acquisition front-ends, and test equipment where you need to multiplex or gate several channels without mechanical relays.
RoHS non-compliant — check your exemption
The DG202CSE-T is marked RoHS non-compliant. For designs that can accept lead-bearing solder (e.g., certain military, aerospace, or high-reliability builds), this is not a blocker — but verify your assembly house's policy before committing.