regarding choosing the Pull and pull down values .....

[[email protected]]

Hi all,

i am new to this group. I have on doubt while desiging the LOGIC for
Inputs we will do pullup and pulldown for a valid logic. depending on
the Voltage and the Curent requirments we will decide the value of
pull up and pull down resistor values is the way we do decide for Pull
up/down values.if there is any common values of resistors for Pull up
and Pull down that are frequently used in the design please let me
know.

Please share doc or application notes of choosing the Pull up/down
values and calculation for the pull up and pull down.

Thanks
srik

 

[David L. Jones]

Hi all,

i am new to this group. I have on doubt while desiging the LOGIC for
Inputs we will do pullup and pulldown for a valid logic. depending on
the Voltage and the Curent requirments we will decide the value of
pull up and pull down resistor values is the way we do decide for Pull
up/down values.if there is any common values of resistors for Pull up
and Pull down that are frequently used in the design please let me
know.

Please share doc or application notes of choosing the Pull up/down
values and calculation for the pull up and pull down.

Thanks
srik

http://www.interfacebus.com/IC_Output_Input_Pullup_Resistor_Values.html

Also, quite often the value chosen is one which is used elsewhere in
the design, to reduce the number of different parts required in the
design. This can save cost.

Dave.