The 20736E was a sip module we offered which accepted an external antenna on that pin. It was identical to the 20736S with an internal antenna, except that in requiring an external unit, the Limited Modular Approval we provided for the 20736S could no longer be leveraged.
Please work through your local Cypress Sales/Marketing team to confirm the current availability of the 20736E.
Thanks for clarifying that. So if I'm understanding this right, it isn't possible to test 20736S with external antenna?
I'd like to avoid swapping parts since 20736E doesn't look like a drop-in replacement.