| ??? 06/22/05 18:38 Modified: 06/22/05 18:39 Read: times |
#95629 - Neither of which are TTL Responding to: ???'s previous message |
I am trying to interface a VS1001K ( mp3 decoder, working at 3.3 Volt) with a AT89S52-24PC
Neither of which are TTL 4. I am not able to find a 74LVC245 here in this part of INDIA ( MUMBAI) I can understand that since that device does not exist. Have you tried to get a 74LVC4245 which is made by, at least, Philips and TI. Anyhow for 3.3V output to 5V input 74HCT at 5V is perfect, just have a look at the datasheet. For reliable 5V to 3.3V you will need to jump through hoops or use the 74LVC4245. Anyhow, why not just use a 3.3v '51 derivative such as a P89LPC... Erik |
| Topic | Author | Date |
| 5 V TTL Vs 3.3 V TTL | 01/01/70 00:00 | |
| what on earth is 3.3V TTL? | 01/01/70 00:00 | |
| re:3.3V TTL | 01/01/70 00:00 | |
| not really | 01/01/70 00:00 | |
| re:not really | 01/01/70 00:00 | |
| had a quick look | 01/01/70 00:00 | |
| Definitely not! | 01/01/70 00:00 | |
| re: TTL terminology | 01/01/70 00:00 | |
re:wrong answer | 01/01/70 00:00 | |
| Where? | 01/01/70 00:00 | |
| philips AN-240 | 01/01/70 00:00 | |
| yeah | 01/01/70 00:00 | |
| 3.3 V LVTTL | 01/01/70 00:00 | |
| Neither of which are TTL | 01/01/70 00:00 |