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[REQ]-Ethernet repeater 10/100

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kobik

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hi,

i'm looking for requmandetion abut Fast Ethernet
Repeater (HUB) in industrial temperature.

thx :D
 

kobik

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requmandetion <= recommendation
 

kot_b

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Hi, I think for begining u can create it simply using 4 fast OP AMPs. Only be sure that they has neede Rin and Rex.
 

Elvis P.

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hi!

you have to take a closer look even at the routing on such a project. 100MBit requires extremly carefully routing (delay of the traces, capacitance, skew etc.) and i would not recommend OP's in such a project because there are some side effects that need a lot of debugging which is only effective if you are planning to do large series and want to spare some money :) there are some symmetrical digital transceivers from national which i would use. (hysteresis, delay etc.)

If you only wnat to extend a single line use a normal switch (not hub)! which might protect you from a lot of trouble! ;.)

regards
Elvis P.
 

dainis

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Re: .

Look any small Fast Ethernet switch chip (2 to 8 port), same of them
contains RAM and PHY, only most problem is Industrial temparature range ....
Redux AptaGate RS-120 have operating temparature from -40 to +85 C.
It need only add too PHY ( Intel LXT972A ) and SDRAM.
 

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