| ??? 12/18/04 15:48 Read: times |
#83419 - Faster does not mean better! Responding to: ???'s previous message |
Erik said:
Faster IS better if you need it. If you do not need it it is not "worse" if you know what you are doing. Even "if you know what you are doing" using faster chips than needed can very well result in something that is "worse"! It's one of the most often given recommendations of an EMC engineer not to use faster chips than needed. Put one ACTMOS chip into an older design, which expects LSTTL chips and you will painfully experience what ground bounce can have for consequences... If you design boards with mixed analog and digital electronics using faster chips than needed can make your design totally fail. In some cases I even use 'old' HEF4000MOS chips and smooth the edges by introducing RC-low pass filters. So, from my point-of-view Jan is totally right: "Faster does not mean better!" Kai |
| Topic | Author | Date |
| Weekend On-Topic (WOnT) | 01/01/70 00:00 | |
| microsoft ?? | 01/01/70 00:00 | |
| Cute ;) | 01/01/70 00:00 | |
| Weekend on Topic | 01/01/70 00:00 | |
| A very reasonable hypothesis | 01/01/70 00:00 | |
| happened here | 01/01/70 00:00 | |
| The chip changed | 01/01/70 00:00 | |
| What happened? | 01/01/70 00:00 | |
| Also an excellent hypothesis | 01/01/70 00:00 | |
| too much | 01/01/70 00:00 | |
| Nah. | 01/01/70 00:00 | |
| Me too, But | 01/01/70 00:00 | |
| systematic debugging | 01/01/70 00:00 | |
| Pb-free? | 01/01/70 00:00 | |
| Did the temp characteristics change? | 01/01/70 00:00 | |
| another one from memory | 01/01/70 00:00 | |
| What it's not. | 01/01/70 00:00 | |
| Solution | 01/01/70 00:00 | |
| Speed! | 01/01/70 00:00 | |
| Speed | 01/01/70 00:00 | |
| Would get the oscope, first | 01/01/70 00:00 | |
| Try this | 01/01/70 00:00 | |
| What it is? | 01/01/70 00:00 | |
| Think volume | 01/01/70 00:00 | |
| Not a puzzle!! | 01/01/70 00:00 | |
| Apologies | 01/01/70 00:00 | |
| Re: | 01/01/70 00:00 | |
| Y2K-and-something | 01/01/70 00:00 | |
| Y2K + something | 01/01/70 00:00 | |
| Y2k05 | 01/01/70 00:00 | |
| The Unix Epoch and the Year 2038 | 01/01/70 00:00 | |
| Yet another true story... | 01/01/70 00:00 | |
| A perfect example | 01/01/70 00:00 | |
| Newer IC | 01/01/70 00:00 | |
| Answer time...? | 01/01/70 00:00 | |
| another guess | 01/01/70 00:00 | |
| language | 01/01/70 00:00 | |
| Faster does not mean better! | 01/01/70 00:00 | |
| Ok | 01/01/70 00:00 | |
| Gladly | 01/01/70 00:00 | |
| To tell the whole truth... | 01/01/70 00:00 | |
| Hidden parameters | 01/01/70 00:00 | |
| Parasitic parameters | 01/01/70 00:00 | |
| Chip manufacturer changed? | 01/01/70 00:00 | |
| Faster/slower or "controlled" rise time | 01/01/70 00:00 | |
| Answer | 01/01/70 00:00 | |
| Amazing.... | 01/01/70 00:00 | |
| Amazed | 01/01/70 00:00 | |
| Split Planes | 01/01/70 00:00 | |
| A bit disappointed... | 01/01/70 00:00 | |
| Series resistors and line matching | 01/01/70 00:00 | |
| Series termination resistors | 01/01/70 00:00 | |
| Series termination | 01/01/70 00:00 | |
| SWR | 01/01/70 00:00 | |
| simulation to the rescue | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| The same moment? | 01/01/70 00:00 | |
| The same moment! | 01/01/70 00:00 | |
I'm Back. | 01/01/70 00:00 |