| ??? 05/19/05 23:13 Read: times |
#93624 - Temperature and 89C2051 |
Hi, I am having a problem with my 89C2051 circuit and cool temperatures. When temperatures close to freezing ocurr the unit doesn't work. It is a simple signal generator circuit that flashes an led before it breaks into the main code. When I turn it on at close to freezing temperatures the led will not flash.
If I bring the unit into the house or on warm days the unit works properly. I first suspected the crystal oscillator but upon checking the datasheet its operating temperature doesn't seem to be the issue. Any ideas would be helpful. Regards James Krushlucki |
| Topic | Author | Date |
| Temperature and 89C2051 | 01/01/70 00:00 | |
| Chip Grade? | 01/01/70 00:00 | |
| A bit vague | 01/01/70 00:00 | |
| oscillator? | 01/01/70 00:00 | |
| Built-in Pierce oscillators ARE reliable | 01/01/70 00:00 | |
| Freeze spray | 01/01/70 00:00 | |
| Overheated parts, too hot soldering? | 01/01/70 00:00 | |
| I have my doubts | 01/01/70 00:00 | |
| What about this? | 01/01/70 00:00 | |
| has happened | 01/01/70 00:00 | |
| Re: has happened | 01/01/70 00:00 | |
| Microwave oven | 01/01/70 00:00 | |
| not microwave, but toaster oven | 01/01/70 00:00 | |
| Thanks for replies | 01/01/70 00:00 | |
| How about this | 01/01/70 00:00 | |
| Wait a minute... | 01/01/70 00:00 | |
| Improvements | 01/01/70 00:00 | |
| resist | 01/01/70 00:00 | |
| Quartzes, etch resist | 01/01/70 00:00 | |
| Quartz Crystals | 01/01/70 00:00 | |
| Quartz crystals | 01/01/70 00:00 | |
no problem | 01/01/70 00:00 | |
| Maybe! | 01/01/70 00:00 | |
| Maybe! | 01/01/70 00:00 | |
| LED temperature rating? | 01/01/70 00:00 |