Hello everyone, i've been trying really hard to get the cp2102 usb to ttl converter onto a board.. the problem with this is that the IC is so small and it becomes really hard for me to solder it manually. Is there any special way to go about doing this easily?is it easier to solder an FT232 chip? i am looking for a USB to ttl converter similar to ft232/cp2102 which will hopefully be easier to put on a board..Thanks..
It very much depends upon what tools you have available. Inspection microscope? Hot plate? Hot air tool? Solder paste? Would you consider spending $25-$30 for a mylar stencil? etc. etc.
Let me suggest this to start. Get a hotplate and magnifying lens. Melt just a little bit of solder on all the pads (magnifying glass helpful here), including the center ground pad but don't put on too much: the solder blob there should be the same height as the solder on the other pads. Apply flux liberally then center the CP2102 as best you can.
Place this on the hotplate (not directly of course -- use a metal plate underneath the PCB) and heat until the solder reflows.
To me that's probably the lowest-cost way to get this done with a reasonable chance of success. There are of course better ways that cost more money.
-- The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, speaker, microphone, light sensor, potentiometer, pushbuttons
I do not know what you have to use for tools.
It does take a fine touch for surface mount. I assume you mean survace mount?
I watched alot of youtube when I learned how the best way for me was. Everyone seems to get their groove and develop their own way that best works for them.
The "special way" is to reflow solder it. You have a PCB you are trying to mount it onto? Depending on what you are doing, maybe having it premounted is what you need
FTDI version http://www.sparkfun.com/products/718
Even has the pins that go to X3 on the Deumeilanove broken out to support Bit Bang programming of a bootloader onto a blank '328
Or get a standalone breakout board http://www.mdfly.com/index.php?main_page=product_info&cPath=65&products_id=486 and a bit of solder paste http://www.sparkfun.com/products/10448
I don't know why FTDI doesn't make a DIP version of this part. ...
Maybe get one of these instead and just remove the parts you don't need. Looks like a Prolific 2303 & a MAX211 (RS232 driver) wih 12Mh MHz inside it. PL2303 also 28 pin SOIC
PL2303: "Full compliance with the USB Specification v1.1(0) and USB CDC v1.1 Support the RS232 Serial interface Support automatic handshake mode Over 1Mbps data transfer rate Support Remote wake-up and power management 96 bytes buffer each for upstream and downstream data flow Support default ROM or external EEPROM for device configuration On chip USB transceiver On chip crystal oscillator running at 12M Hz Single chip solution in a 28 Pins SOIC package "
thanks a lot for the replies everybody..will give it a shot..really appreciate the help..
Try to use iron with thin tip like this: http://www.tme.eu/html/EN/8-w-12-v-mini-soldering-irons/ramka_2650_EN_pelny.html . Apply thin layer of solder to pins, place chip and adjust pads with traces, solder from sides (CP210x pins available from sides). To finish, melt solder with hot-air station or using big iron from top or bottom of pcb.
Seems an "Irony" but i actually find easier to solder fine pitch with a wide chisel tip and letting the flux take care of avoiding shorts, of course i inspect it under the microscope after finishing. (if you don't want to spend big $$ on a micro, a good watchmaker's loupe helps too)
I watched several of this guy's videos. I'm far from an expert with soldering, but I found a wide tip worked well.