14-TSSOP footprint and rework
The SN74CBT3126PWR is a 14-pin TSSOP bus switch from the 74CBT series, packing four independent 1:1 switches into a 4.40 mm-wide body. The 0.65 mm pin pitch is forgiving under a hot-air station — the leads are visible and accessible, so aligning a replacement part is straightforward. Pin 1 is marked with a dot on the top surface; the orientation notch on the package end confirms it before the part seats.
Four independent switches on a single supply rail
Each switch is a pass-gate with its own enable; when the enable is low the channel is off (high-impedance), and when high it connects the A port to the B port with minimal propagation delay. The 5 V supply range covers standard 5 V TTL and CMOS logic levels without a level translator.