Bus interface with 64 mA sink — what that means on the bench
The SN74ABT543ADW is an 8-bit non-inverting transceiver from TI's 74ABT family, packing 32 mA source and 64 mA sink per output — that sink rating is what matters when you're driving a heavily loaded backplane or a bank of LED indicators where the total current per pin pulls the rail down. The 24-SOIC wide-body package (7.50 mm width) is the same footprint as the standard 24-pin SOIC but with the wider body that handles the thermal dissipation from those 64 mA sinks. It's surface-mount, reworkable with hot air, and the tube packaging means you're getting the parts in a rigid stick — no tape-and-reel handling concerns for small-run or repair bench work.
The 4.5 V min supply ensures the outputs still toggle cleanly even when the 5 V rail droops under load. Single-element, 8-bit wide — one chip handles a full byte lane. The non-inverting path means the data sheet polarity matches the pinout; no inversion traps for the rework tech who's tracing a signal through a dead board.
Active production and compliance — no last-time-buy scramble
Texas Instruments lists this part as Active — no end-of-life notice, no NRND flag. That means it's still a valid BOM line for new designs and replacements. ROHS3 compliant, so it passes the current RoHS exemption roll-up without needing a waiver.