Lifecycle and sourcing reality
The 54LS54DMQB: No last-time-buy or obsolescence risk for new designs.

54LS54DMQB, LS series, AND-OR-INVERT gate, Bulk package, active lifecycle.
| Parameter | Value |
|---|---|
| Series | * |
| Package | Bulk |
The 54LS54DMQB: No last-time-buy or obsolescence risk for new designs.
No, the 54LS54DMQB is listed with a Bulk package, which typically corresponds to a through-hole DIP or ceramic flatpack — not a surface-mount package.