| ??? 12/19/05 19:07 Read: times |
#105549 - If connections are short... Responding to: ???'s previous message |
I just had a look into datasheet of your FPGA. It seems that maximum input signal transition time is 250nsec. This would allow a stray capacitance of up to 110pF. So, when the connection between 74HC09 and FPGA is very short, then you can do it with the open drain methode.
Kai |
| Topic | Author | Date |
| 5 - 3.3V conversion | 01/01/70 00:00 | |
| 74lvc4245 available from Philips, TI and | 01/01/70 00:00 | |
| Package and MOQ? | 01/01/70 00:00 | |
| Where is the problem? | 01/01/70 00:00 | |
| English! | 01/01/70 00:00 | |
| I did not suggest an AND gate | 01/01/70 00:00 | |
| I am a novice.. | 01/01/70 00:00 | |
| many components introduced the last 3-5 | 01/01/70 00:00 | |
I would learn | 01/01/70 00:00 | |
| Open drain suffers from big rise time | 01/01/70 00:00 | |
| FPGA | 01/01/70 00:00 | |
| Origin of oscillation | 01/01/70 00:00 | |
| Deep Inside! | 01/01/70 00:00 | |
| If connections are short... | 01/01/70 00:00 | |
| Thankyou | 01/01/70 00:00 |