RF circuitry, which includes RF RX circuitry, an RF PA, RF TDD switching circuitry, and RF TX switching circuitry, is disclosed. The RF TX switching circuitry is coupled between the RF PA and the RF TDD switching circuitry. The RF PA receives and amplifies an RF input signal to provide an RF TX signal. During a first CA FDD-TDD operating mode, the RF TX signal has a first FDD TX carrier frequency, the RF TDD switching circuitry forwards a first filtered RF TDD RX signal to the RF RX circuitry, and the RF TX switching circuitry provides isolation between the RF PA and the RF TDD switching circuitry. During a first TDD TX operating mode, the RF TX signal has a first TDD TX carrier frequency and the RF TX switching circuitry forwards the RF TX signal to the RF TDD switching circuitry.