Device identity and active production status
The TMS3450NL is a Texas Instruments clock IC fabricated in MOS technology and housed in a 28-pin PDIP (Plastic Dual Inline Package). It belongs to the Clock & Timing ICs category, a broad class used for frequency generation, clock distribution, and timing reference in digital systems.
RoHS compliance and procurement note
The TMS3450NL is marked RoHS non-compliant, which indicates the device contains lead (Pb) or other restricted substances above the RoHS threshold. This is consistent with its PDIP-28 package and MOS-era design — many legacy clock ICs were never transitioned to RoHS-compliant die-attach or lead finishes. For BOMs that require RoHS compliance, a lead-free alternative or an exemption-applicable use case must be verified at the system level.