What the 74165PC is and what it does
The Texas Instruments 74165PC is an 8-bit parallel-load shift register built on TTL logic — it takes eight parallel inputs and clocks them out serially, a common building block for expanding digital inputs on a microcontroller or bus system.
The 74165PC is marked RoHS non-compliant — the original TTL package contains lead in the solder finish and possibly in the die attach. If your assembly line or end-product requires RoHS exemption (e.g., leaded high-reliability soldering), this part fits; if you need full RoHS compliance, a lead-free equivalent from the same logic family is the migration path.
Package and physical fit
Supplied in Bulk — loose tubes or trays, not tape-and-reel.