| ??? 03/28/07 02:15 Read: times |
#135996 - Output = Input Responding to: ???'s previous message |
Mike Stegmaier said:
if the buffer is enabled, would the output always equal the input, no matter what current is applied to the input? Short answer = yes. Long answer. The HC buffers have a high input impedance. They do not draw DC current. There will be trace amounts of AC curent as the inputs charge up, since there is about 10 pF per pin. So you cannot apply a current to the inputs. Having said that, the 74HC245 may be used as a buffer on the upper address byte (port 2). Those signals have a large amount of set-up and hold time. |
| Topic | Author | Date |
| would buffering help, or hinder? | 01/01/70 00:00 | |
| Output = Input | 01/01/70 00:00 | |
| When in doubt, leave it out ... | 01/01/70 00:00 | |
| That's the key! | 01/01/70 00:00 | |
| . | 01/01/70 00:00 | |
| Expensive jumpers?! | 01/01/70 00:00 | |
| Image, Image, Image | 01/01/70 00:00 | |
| LCR | 01/01/70 00:00 | |
| i think you are confusing Mike | 01/01/70 00:00 | |
| General Statement | 01/01/70 00:00 | |
| Jumpers are not bad | 01/01/70 00:00 | |
| divide and conquer | 01/01/70 00:00 | |
| ... | 01/01/70 00:00 | |
| Wire Jumpers | 01/01/70 00:00 | |
| You might want to rethink your position | 01/01/70 00:00 | |
| Advice | 01/01/70 00:00 | |
| More contradictions | 01/01/70 00:00 | |
| Misconceptions | 01/01/70 00:00 | |
| Optimal? | 01/01/70 00:00 | |
| point confirmed | 01/01/70 00:00 | |
troubleshoot WHAT | 01/01/70 00:00 |