| ??? 01/30/06 14:27 Read: times |
#108716 - a bit more Responding to: ???'s previous message |
HCT has TTL compatible inputs where as HC has CMOS compatible inputs.
HCT has inputs compatible with 3.3V levels where as HC has CMOS compatible inputs. HC can be used in 3.3V supplied logic HCT can not when supplied vith 5v the ouitput levels is same for both. Both can drive TTL (5V) logic with the outouts. HCT works perfectly for converting 3v3 to 5v, for concerting 5V to 3v3 e.g. 74LVC4245 is required Erik |
| 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 | |
| add pullups for OE1\ and OE2\, Resistors | 01/01/70 00:00 | |
| 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 |