Bus driver for TTL logic — ALS series, active, RoHS non-compliant
The SN74ALS756-1N is a bus driver from the Texas Instruments ALS series, designed to drive bus lines in digital systems. It is a single-channel device intended for TTL-compatible logic levels.
For a BOM freeze, this is straightforward — no urgent need to qualify a drop-in replacement. However, the part is RoHS non-compliant, so it cannot be used in assemblies requiring lead-free solder per EU RoHS directives. That restricts it to legacy production runs, military/aerospace contracts with leaded exemptions, or repair stock for existing boards.
For volume commitments or blanket orders, the active status supports multi-year supply without the urgency of a last-time-buy window.