This is not an obsolete or NRND part, so there is no last-time-buy pressure or forced redesign for a replacement. Note the RoHS non-compliant marking: this part contains lead (Pb) and is not exempt for most commercial RoHS-regulated markets. It is suited for military, aerospace, or industrial applications where RoHS exemptions apply or where the BOM is specified for leaded solder processes.
This is the standard for through-hole DIP or similar packages that are hand-inserted or wave-soldered. Verify the exact case style (e.g., CDIP, PDIP) from the manufacturer's datasheet to confirm PCB footprint compatibility.