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RF430F5978: Please recommend IC for immobilizer function

Part Number: RF430F5978

Hello TI experts,

My customer currently uses RF430F5978 for their product. (it is smart key for car.)

as you know, due to the delivery issue of these days, they want to find another solution.

I recommended sub-1ghz wireless MCU, but they want more function, immobilizer.

Could you recommend IC for immobilizer function? What category should I refer for recommendation?

(cause unit price and deliver is very important to them.)

Best regards,