Dual 8-bit inverting buffer for 5 V backplanes
The SN74ABT16540ADL: Two independent 8-bit elements in a 48-SSOP package, each sourcing 32 mA and sinking 64 mA.
64 mA sink — what it buys on a loaded bus
The headline output drive — 32 mA source, 64 mA sink — is the spec that decides whether this part fits your backplane or memory interface. A standard 74HC or 74LV buffer might manage 8 mA or 24 mA; the ABT16540's 64 mA sink handles the capacitive load of multiple daisy-chained inputs without signal degradation. On a 5 V bus with ten loads, the extra drive margin means you can skip a second buffer stage. The 3-state outputs let you share the bus with other drivers, which is standard for multiplexed address/data lines.
Industrial temperature — outdoor and factory-floor ready
The 48-SSOP package (0.295-inch body width) is a fine-pitch SMD — rework needs a hot-air station and steady hands, so it is not a field-swap part, but it saves board area versus a 48-pin TSSOP or SOIC.
Active lifecycle — no LTB worry
No second-source listed; the 74ABT family is mature but still supported.