help about single chip modem

[shanren]

mx614 uc

hi,i need a single chip modem,5v supply,data rate from 1200bps-9600bps,can anybody help me?any info will be good,thank you!

 

[mikasi]

73m2901 cmx868

What is the physical media for data communiction you intend to use (power cable, twisted pair, air, ...) ?
Which type of data coding you will be using (NRZ, Manchester, ...) ?
What kind of modem (modem -> modulator-demudolator) device you are searching.
What kind of modulation type you intend to use ?


Regards, Bulletproof

 

[techie]

What about a telephone line modem

 

[ribeiro_pt]

look for mx614 or fx614

single chip 1200 fsk modem ...
used by hamradio for packet ,aprs etc etc , very nice one for use with uC, no max232 needed ...


Best Regards
Rib

 

[penrico]

Take a look at Cermetek modems, they have resolved all the telephonic circuits, you just connect serialy in a side, and in the other side the telephonic line. www.cermetek.com

So, Silicon Labs, has modems kits too from 1200bps to 33600bps (www.silabs.com)

Then, TDK has a very good 2400 bps modem (73M2901).

I used Mxcom (mx614) modems, and didn't like me.

 

[beuch]

I think you should look to OEM suppliers, they offer boards with differents modem chip (TDK, Connexant...) and TTL interfaces you can connect directly to a simple MCU. Those kind of boards are typicaly used in set top box.

I think you can't buy the chip modem alone because you will need quantity to do so.

Here after the Conexant line card.

beuch.

 

[algilsan]

i'm using CMX868 (v22.bis modem) and CMX866 (v22.bis modem with AT commands built in) in my emmbedded modem and they are very good.

you can find them form www.cmlmicro.com

regards