| ??? 01/30/06 04:13 Read: times |
#108669 - Why HCT Responding to: ???'s previous message |
Dear Vignesh,
HCT has TTL compatible inputs where as HC has CMOS compatible inputs. HCT can accept 3V logic level singlas and buffer them correctly. HC being CMOS level inputs cant work with 3V logiv levels. Some of newer PCs have 3V Parallel ports so using HC will work on some PCs but not all. having said that doesnt mean HCT is superior to HC or inferior. HC has advantage of better noise margin. Selection depends on application. Regards, Prahlad Purohit |
| Topic | Author | Date |
| Confessions about ISP of s52 | 01/01/70 00:00 | |
| I still persist on Asim Khan's prog. ! | 01/01/70 00:00 | |
| whats BAD in Atmels Adapter | 01/01/70 00:00 | |
| HC is wrong. | 01/01/70 00:00 | |
| Abhishek or me? | 01/01/70 00:00 | |
| HC and HCT | 01/01/70 00:00 | |
| Why HCT | 01/01/70 00:00 | |
| Is HCT available there? | 01/01/70 00:00 | |
| 74LS244 ? | 01/01/70 00:00 | |
| Mine works with LS | 01/01/70 00:00 | |
| Post Script Viewer. | 01/01/70 00:00 | |
| a bit more | 01/01/70 00:00 | |
| aec_isp | 01/01/70 00:00 | |
| OOps | 01/01/70 00:00 | |
| Just got an idea | 01/01/70 00:00 | |
| Other programmers | 01/01/70 00:00 | |
| Atmel ISP | 01/01/70 00:00 | |
| Good link Ijaz | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| almost same problem | 01/01/70 00:00 | |
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| Thanks! | 01/01/70 00:00 | |
| reset? | 01/01/70 00:00 | |
| Reset | 01/01/70 00:00 | |
| Try this | 01/01/70 00:00 | |
| It has worked! | 01/01/70 00:00 | |
| frequency | 01/01/70 00:00 | |
| 12MHz | 01/01/70 00:00 | |
| I DEVELOPED A WINDOWS BASED ISP | 01/01/70 00:00 | |
| GUI Prog for AEC ISP Cable | 01/01/70 00:00 | |
| Some doubts | 01/01/70 00:00 | |
| Also used for CPLDs | 01/01/70 00:00 | |
| Let me not jump now | 01/01/70 00:00 | |
| Real World Experience | 01/01/70 00:00 | |
| As I said... | 01/01/70 00:00 | |
| Guys, take care... | 01/01/70 00:00 | |
| Retrospection | 01/01/70 00:00 | |
| Good Work | 01/01/70 00:00 | |
The much awaited | 01/01/70 00:00 |