What the TIL3021 is and where it fits
The TIL3021 is a TRIAC output optocoupler from Texas Instruments, designed to provide galvanic isolation between a low-voltage control circuit and an AC load such as a triac or SCR gate. It is cataloged under the Memory (DRAM / SRAM / Flash / EEPROM) category, but the device itself is an optocoupler — the category reflects a legacy classification rather than the function.
Lifecycle and compliance reality for procurement
The TIL3021 is listed as Active in production status, meaning Texas Instruments continues to manufacture the part with no announced end-of-life. It is RoHS non-compliant, so it contains lead or other restricted substances above the RoHS threshold — this matters for builds that must meet RoHS exemption deadlines or ship to regions with strict RoHS enforcement.