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DP83849C: DP83849C transformer TCT RCT pin

Frank Lee96
Intellectual 830 points
Part Number: DP83849C

Hi TI,

I'm using DP83849C,the circuit on the datasheet,the TCT and RCT pins are pulled up to 3.3V,BUT in some other network transformer circuit,the TCT and RCT pins are pulled down to ground by capacitor.

I want to know the real reason or theory basis why some chose to pull down when some chose to pull up?

Best regard,

Frank