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Sometimes you can salvage IC with broken off pin. You will need very fine soldering tip, SMD solder (very thin one), tweezers, magnifying glass and very thin wire. Tin end of the wire and glue it to some convenient spot on PCB. Clamp PCB in small vice so it cannot move and heat face of broken pin for about 5 sec. Soldering iron set at 350 degrees. Apply very little of solder. If some of the solder stick to the face of pin you have succeeded. Bend the wire so it lies against face of broken pin. Apply heat on the join briefly so solder flows and two surfaces are joined. Mechanically such a joint will be very weak but electrically it should be OK for small signals.
Sometimes it works, sometimes it doesn’t. It depends on patience and the skills.
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