The Texas Instruments SN74ALS842DW is a bus driver from the ALS (Advanced Low-Power Schottky) series, designed for buffering and driving bus lines in digital systems. The ALS family gives you a good balance of speed and power — not the fastest logic out there, but it runs cooler than straight LS and still talks to 5 V TTL logic without level translation.
The RoHS non-compliant status means it's built with tin-lead solder, which matters if your assembly line is set up for lead-free only; if you need the lead-free variant, check the '' suffix version instead.
Sourcing reality — where to buy and how to get it
If you're filling a BOM line for a production run or a repair, send an RFQ; we'll come back with a firm price and lead time based on what's actually on the shelf or at the factory.