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TL494: Oscillator Frequency of TL494

Part Number: TL494

Dear, All

It is a question about calculation formula of Oscillator Frequency described in TL494 data sheet.
In the data sheet P5 '7.6 Electrical Characteristics, Oscillator Section', the oscillation frequency is described as follows.
Condition: Ct = 0.01 uF, Rt = 12 kOhm
           Oscillation frequency 10 kHz (typ.)
However, the equation (3) in the item '9.3.2 Oscillator' in the data sheet P11 is
  Fosc = 1 / (Rt * Ct)
It is described as about 8.3 kHz when calculated by this equation.
Therefore, customers want to know the following.

- Is the equation (3) on P11 wrong?
  Or is the condition of '7.6 Electrical Characteristics, Oscillator Section' incorrect?

Please let me know.

Thanks, Masami M.