1 x 2:1 multiplexer for signal routing
The SY89543LMG-TR is a 1 x 2:1 multiplexer from Microchip's Precision Edge® series, designed to route one of two input signals to a single output. It operates from a single 3V to 3.6V supply rail, making it a direct fit for 3.3V logic systems where signal selection is needed without level shifting. Two independent circuits are packed into the 32-VFQFN exposed pad package, so you get two mux channels in one 5x5 mm footprint.
Microchip lists the SY89543LMG-TR as Active, so you can plan multi-year production runs without scrambling for a last-time buy. CT works for prototype or low-volume builds.
32-VFQFN rework and footprint notes
Will it survive the hot air? Yes — the exposed pad wicks heat evenly, so you can reflow it with a standard lead-free profile (260°C peak).