Implantable lead with in-lead switching electronics

An apparatus comprising:

• an implantable lead, comprising an elongate lead body comprising a proximal portion and a distal portion, the lead comprising:
• a coupler, located at the proximal portion of the elongate lead body, the coupler configured to couple to an implantable medical device;
• a first conductor, coupled to the coupler, and extending away from the coupler at least partially through the lead along the elongate lead body;
• a first electrode, located on the lead away from the coupler;
• a first switch, located on the lead away from the coupler, the first switch configured to control conductivity between the conductor and the electrode;
• and
• a first controller circuit, located on the lead away from the coupler, the first controller circuit coupled to the conductor and including a first multiplexer circuit configured to multiplex over the conductor a first signal and a second signal, the first controller circuit configured to control the first switch based at least on the first signal.