RoHS non-compliance — what it means for your BOM
This part is RoHS non-compliant (cites). That is not a defect — it is a deliberate process choice. The 54S133FM uses leaded solder finish, which is preferred for high-reliability and long-life applications where tin whisker growth from pure-tin finishes is a concern. If your BOM requires RoHS exemption documentation (e.g., for military or aerospace contracts under the relevant exemption clauses), this part fits. If your assembly line is RoHS-only with no exemption allowance, you will need a leaded-process waiver or a separate RoHS-compliant logic family.
Lifecycle and sourcing posture
The 54S133FM carries an Active lifecycle status (cites). For a BOM freeze or a long-production-run design, this part does not introduce obsolescence risk on its own. If you need volume pricing or a lead-time window, submit an RFQ and we will come back with a firm number from our multi-source channel.
Package and field-service fit
That is the standard format for through-hole DIP-style ICs. If you are a field-service technician swapping a failed gate on a legacy board, this is the format you want: socket-friendly, no hot-air station required, and the orientation is obvious from the notch or dot. It fits in a standard field kit without worrying about reel handling. No lab, no bench — just a desoldering pump and a steady hand.