The 54F174DM is a D flip-flop from the F/FAST series of TTL logic, manufactured by Texas Instruments. It belongs to the 54F military-temperature-grade family, designed for extended-range environments where commercial 74-series parts would not be specified.
RoHS status and compliance reality
The 54F174DM is marked RoHS non-compliant — the lead-bearing finish is standard for this military-grade logic family. This is not a defect; it is the intended material set for high-reliability applications that require tin-lead solderability or are exempt from RoHS restrictions under military/aerospace exemptions. Buyers working on RoHS-exempt programs (defence, aerospace, medical implant, or high-rel industrial) will find this part fits the BOM without a waiver. For commercial RoHS-mandated assembly, a lead-free alternative from the 74F or 74ACT series would be the migration path.
Sourcing posture and supply chain note
Because the 54F174DM carries a lead-bearing finish and military-temperature rating, the gray-market risk is lower than for a high-volume commercial part — the marking consistency and date-code traceability are easier to verify. The bulk packaging means each unit is individually handled; lot traceability documentation is available on request.