Parallel synchronous transmission using GPIO and DMA. Which chip to use to receive data under 20MHz?

[#1]

I found the doc AN4666 and AN2548, but I could not come to a conclusion.

I have the STM32F103C8T6, but when performing a sequence of 1000 readings, the average time was of 266us, approximately 3.759398 MHz.

I would like to know which chip model should I use to be able to receive data from the external ADC at a frequency of 20 MHz and 8 bits (TLC5510), with external clock, managed by external interrupt (ADC clock)?

Thank you.

[#2]

I also asked on the ADC manufacturer's website if it is safe to overclock this AD9288-40 to get 100MSPS but had no answer yet. Scary!