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TL431-Q1: what is the total transistor number in our chip?

Part Number: TL431-Q1

Dear team,

My customer needs to compute FIT of TL431-Q1(A version), so they need to know the total transistor numbers of TL431-Q1. There is the detailed schematic as below, there are 11 transistors in the schematic. So TL431-Q1 has 11 transistors or more? If more, could you please tell me the number?

Thanks & Best Regards,

Sherry