The SN74LS649NT is a bus transceiver from Texas Instruments' LS (Low-power Schottky) TTL family, designed for bidirectional data transfer between two independent buses. It sits in the Microcontrollers & Processors (MCU / MPU / DSP) category, though its role is a logic-level interface — translating between bus segments or buffering a processor's data lines.
Lifecycle and compliance — active, but watch the RoHS flag
The part is marked RoHS non-compliant, which means it contains lead (Pb) above the 0.1 % threshold. This is typical for LS TTL legacy parts; if your BOM requires RoHS exemption 7(c)-I for lead in electronic components, verify the acceptance with your compliance team.
Sourcing and supply posture
Supplied in Bulk packaging — loose tubes or trays, not tape-and-reel. Plan for manual placement or tube-fed pick-and-place if your line is set up for reels.