I want to make a converter that plugs into a usb port and the other has a RJ45 socket
pl provide the schematic ckt for the same

 

Like this:

or
http://hardforum.com/showthread.php?t=1392736

 

thanks
but i need the circuit diagram for USB-RJ45

 

It's a lot more difficult than that. There is a microcontroller between the USB port and the RJ-45 plug.

This link briefly talks about USB communications - http://www.faculty.iu-bremen.de/birk/lectures/PC101-2003/14usb/FINAL VERSION/usb_protocol.html

This one give some information about TCP/IP communications (associated with the RJ-45 connector) - http://www.yale.edu/pclt/COMM/TCPIP.HTM

 

Comon guys...throw the guy a bone. In 10 minutes this is what I found:

ASIX has a USB to Fast Ethernet product line. The Ax88172's product folder includes numerous schematics, layout files, and BOM.

Other companies like Silicon Labs offer similar chips. The CP2200 is used in USB to Ethernet bridges. There are some demo boards like the CP2201, but these are not as a clear cut solution as ASIX.

Another idea would be to modify the DEV-00042 from Sparkfun Electronics. The schematic is actually from a TI Application note. I think you could replace the MSP430 in this schematic with a TUSB3410 also from TI.

This may get you one step closer.