TCAN334 Application Circuit

hi i found those details from the datasheet. ,
R1,R2,R3, are for current limiting (using 150 ohm 100mW ).
C5,C7 as 100Pf 16V,
R5, R6 treminal resistance as 61.9 ohm 250mW
c2, c3 decoupling capacitors as 0.1uF,0.1UF (is this correct? i dont know how to select decoupling caps)
C1,C4,C8 as 0.1uf (is this ok?)
The pin 5 has internal pull down, i cant find how much current is required to make the pin high, please help me to find how much current required for pin 5, so that i can calculate R7 and R4

Note the micro is Tm4c1231d5pm

Hi Subaananthan,

Most of your values look correct to me. Note that components R1, R2, R3, R4, R7, C1, C4, and C8 are optional and can be removed if they are not needed for your application. A decoupling capacitance of 0.1 uF is a good choice for this part, since it is large enough to provide adequate filtering but still available in smaller packages. For C1, C4, and C8, though, 0.1 uF is likely too large. When combined with the series resistances, this forms a low-pass filter that will limit the speed of these signals. I recommend either removing these capacitors or using values in the pF range if some high-frequency noise filtering is desired.

Pull-up or pull-down resistors should be in the range of 1 kOhm to 10 kOhm. You can get an idea of the internal pull-down strength by looking a the specifications for input leakage current. In this case the maximum leakage current into the SHDN pin is 10 uA, so if you had a 10 kOhm pull-up resistor you would only have 100 mV of voltage drop across it.

Please let me know if you have any other questions.

Best regards,
Max