SN74AHCT541PWR

SN74AHCT541PWR is the tape-and-reel TSSOP-20 code of TI's AHCT octal buffer and line driver with 3-state outputs. The selection point is the AHCT input stage: with the device powered from a 4.5 V to 5.5 V rail, its inputs accept TTL logic levels, so legacy TTL or 3.3 V-domain signals can drive a clean 5 V CMOS bus without a separate translator stage. Eight non-inverting channels share two output-enable controls, and the outputs source or sink up to 8 mA, enough for heavily loaded backplane and address/data bus runs in industrial controllers, PLCs and legacy-interface cards. Because the outputs can be placed in a high-impedance state, several drivers can share one bus, which simplifies multi-board architectures and in-system testing. Selection advice: choose the AHCT version specifically when the driving side is TTL-threshold logic; if every signal on the board is already 5 V CMOS, the plain AHC541 gives the same footprint with CMOS input thresholds. Confirm the full PWR code on your BOM, because the PW package also ships in tube packing under a different orderable suffix. Parameters verified against Texas Instruments documentation.