| ??? 02/11/10 14:36 Read: times |
#173071 - 74xxx Responding to: ???'s previous message |
Jan:
If we were in 1981 the answer to your question might be yes. But for controllers of this type, which I've worked on since about 1992, I always used 82C54s with PLDs/CPLDs over 74xxx logic. Physical size alone made the 82C54s a good solution. The present investigation is going to demand nearly 30 timer channels. Using logic for that seems like I'd be back doing boards with scads of TTL chips in rows and rows. CPLD may be the best solution so far. I do need to still investigate if there are some high speed DSPs that could run fast enough to so all the timing in software but something tells me that this may not be a desirable scheme. Michael Karas |
| Topic | Author | Date |
| Trying To Identify a Robust Timer Chip | 01/01/70 00:00 | |
| Freescale | 01/01/70 00:00 | |
| Freescale | 01/01/70 00:00 | |
| Have you considered the PSOC1 ? | 01/01/70 00:00 | |
| PSOC1 | 01/01/70 00:00 | |
| I know there may be many reasons to say "no"... | 01/01/70 00:00 | |
| 74xxx | 01/01/70 00:00 | |
| AM9513 | 01/01/70 00:00 | |
| 9513 | 01/01/70 00:00 | |
| they were also available in PLCC, which is not so huge | 01/01/70 00:00 | |
| Have you tried ICMASTER | 01/01/70 00:00 | |
| 80% Analogue | 01/01/70 00:00 | |
| RE: 254 variants | 01/01/70 00:00 | |
| I did Manual search | 01/01/70 00:00 | |
Possibly still all 555s? | 01/01/70 00:00 |