Device identity and sourcing posture
The Texas Instruments 5422DM is a NAND gate implemented in TTL logic — a basic building block for combinatorial logic functions in legacy and high-reliability systems.
Compliance and package note
Marked RoHS non-compliant — the part contains lead in the solder finish or die-attach, which is typical for TTL logic ICs manufactured before the RoHS transition. This may affect its eligibility for new designs under certain environmental regulations, but it remains a standard option for maintenance and repair of existing equipment where the exemption applies. Supplied in Bulk package — loose units in an anti-static tube or bag, not tape-and-reel. This is the standard delivery format for DIP and other through-hole logic ICs and suits manual assembly or low-volume rework.
Second-source and cross-reference landscape
All are functionally equivalent NAND gates in the same TTL family, though package and temperature-grade differences may exist. The 9005PC is the closest direct cross — a drop-in replacement in the same logic family without rewiring, assuming the same pinout and supply voltage.