What the ratings mean for your BOM
The hermetic 20-CDIP package seals the silicon against moisture.
The SN54S244/BRA is listed with an Active lifecycle status, meaning Texas Instruments continues to manufacture it. For long-life military and aerospace programs that cannot requalify a substitute, this is the part to freeze into the BOM. The part is RoHS non-compliant, which is expected for a hermetic ceramic package — lead-bearing solder finishes are standard for high-reliability applications and are often exempt from RoHS restrictions under military/ aerospace exemptions.
