H
Hargen
Guest
Hello,
I want to do the worst case analysis for my RS-422 interface that has
national DS26C31 driver, but I found I do not know its output impedance.
EIA-RS422 standard specifys 5ohm to 100ohm for the output impedance,
but with 100ohm it is very difficult to secure the required margin when fail
safe
protection (1kohm) is applied.
What is the realistic worts value of the output impedance? Does anyone know
it?
I found less than 10ohm output impedance for harris HS26C31.
Thanks.
Hargen
I want to do the worst case analysis for my RS-422 interface that has
national DS26C31 driver, but I found I do not know its output impedance.
EIA-RS422 standard specifys 5ohm to 100ohm for the output impedance,
but with 100ohm it is very difficult to secure the required margin when fail
safe
protection (1kohm) is applied.
What is the realistic worts value of the output impedance? Does anyone know
it?
I found less than 10ohm output impedance for harris HS26C31.
Thanks.
Hargen