SN74LVC125APWR

SN74LVC125APWR is the tape-and-reel TSSOP-14 code of TI's LVC quadruple bus buffer, four independent channels each with its own active-low output enable and 3-state output. The selection point is bus hygiene at mixed speeds: the channels isolate a slow or tri-stated peripheral segment from a fast shared bus, and each channel can be released independently, so one device can gate four separate signal groups in memory-mapped I/O, keypad and display interfaces, or JTAG chains. The LVC process runs from 1.65 V to 3.6 V, drives up to 24 mA per output for loaded backplanes, and tolerates 5.5 V on inputs and on disabled outputs, so it can sit next to legacy 5 V logic without clamp damage. Ioff partial-power-down support keeps a powered-down card from loading a live bus. Selection advice: the per-channel enable is the reason to choose the 125 over a plain octal buffer — if all eight lines always switch together, an octal device uses less area; if the four lines belong to different power or protocol domains, the independent enables earn their pins. Match the full PWR suffix for tape-and-reel supply in this footprint. Parameters verified against Texas Instruments documentation.