Suggest a RC circuit for reset

[gounder]

Hi,

I am using BF533 processor in one of audio application. The reset time should be minimum of 11tclkin. The maximum frequency of operation will be 533MHz(1.8ns). For reset i am going to use RC circuit. Can anyone suggest suitable RC circuit for this.

Or can anyone verify the below calculation of finding the value of RC
t=RC
T=1.8ns
R=10K
C=1.8 ns/10K
C=18pF

 

[WimRFP]

RC circuit Design

When the frequency of operation is variable, and you nead at least 11 clock cycles, you need to calculate your RC delay time based on the lowest frequency. I also assume that the RC time may/can be longer.

Is this a power up delay, or reset given from another circuit?

for a decision level of half the supply voltage:

Delay (rising voltage, from empty capacitor to supply voltage) = 0.69RC.

Maybe you can supply some additional info to be sure our comment is useful to you.