| ??? 06/13/07 21:30 Read: times |
#140723 - BGMicro.com sells DTMF ic's cheap Responding to: ???'s previous message |
Hello Frode Aarebrot,
Getting DTMF tone decoder and encoder IC's is hard. I wanted to use the MT8888 DTMF IC but I could only get it in 35 quanity at $8.50 each. After much effort I found BGMicro offers the best deal. Getting a DTMF generator was difficult but the answer was right under my nose. The ICS5089 DTMF KYBD ENCODER is easy to interface to a 80C51 MPU although it takes nine pin's. See the below diagram for information. I also tried to generate the DTMF tones using the C software on 8052.com site but I couldn't get it to work. It would generate the tones but they were unusable. Rather than waste a lot of time I just decided to do it using external hardware. All of my searching on the internet I only found two places that had 80C51 software to do it. I hope this helps. Regards, Charles Bannister 1-800-276-2206 <===================== BGMicro ordering. 972-205-9447 972-205-9447 ACS1023 DTMF DECODER IC SSI-202 Data Sheet Your Price $0.50 ICS5089 DTMF KYBD ENCODER 5089 Your Price $2.99 ICS8870 DTMF DECODER IC 8870 Your Price $4.00 ICSSSI204 DTMF DECODER IC SSI204 Your Price $4.50 http://www.bgmicro.com/index.asp...tmf&Page=1 Sells the above ic. Shipping is $6.00 http://www.8052.it/download.htm Contains assembly program to generate DTMF tones using 80C51 type of IC. http://www.8052.com/forum/read.phtml?id=49076 Buggy. I can't get it to work correctly. http://members.aol.com/cpu8052/D...C_KYBD.gif ICS5089 can be interfaced to MCU. Read data sheet for details. Pretty easy.  |
| Topic | Author | Date |
| Want to do DTMF interface, but can't find parts | 01/01/70 00:00 | |
| go to either and search on DTMF | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| Buy more than one | 01/01/70 00:00 | |
| Group buying? | 01/01/70 00:00 | |
| Thanks to everyone | 01/01/70 00:00 | |
| you are using the wrong approach | 01/01/70 00:00 | |
| Maybe Surplus Stuff | 01/01/70 00:00 | |
| I would not buy surplus | 01/01/70 00:00 | |
| re: surplus | 01/01/70 00:00 | |
| Trying to understand.... | 01/01/70 00:00 | |
| because | 01/01/70 00:00 | |
| an example | 01/01/70 00:00 | |
| in context | 01/01/70 00:00 | |
| ebay | 01/01/70 00:00 | |
| try sayal | 01/01/70 00:00 | |
| BGMicro.com sells DTMF ic's cheap | 01/01/70 00:00 | |
| Charles, oh Charles | 01/01/70 00:00 | |
| Erik, oh Erik. You have a bit loose. | 01/01/70 00:00 | |
| you set the trap to tempt him to cheat | 01/01/70 00:00 | |
| But Is it cheating? | 01/01/70 00:00 | |
| Not necessarily... | 01/01/70 00:00 | |
an opportunity | 01/01/70 00:00 | |
| DTMF Transceiver suppliers | 01/01/70 00:00 |