TTL Crystal Oscillator Schematic
A crystal oscillator schematic use one 7400 TTL IC. We can use crystals of the fundamental type and from 1 to about 15MHz.
| PARTS LIST | |
| R1 | 470Ω |
| R2 | 470Ω |
| R3 | 1kΩ |
| C1 | 0.01µF (103) |
| C2 | 0.01µF (103) |
| IC1, IC2, IC3, IC4 | 7400 or 74LS00 |
| XTAL | Crystal (from 1 to about 15MHz) |
The circuit above shows a series resonant oscillator circuit, using TTL NAND GATES.
Don’t use 74HCT00 type IC. HCT type will not work, because this type is too fast.
Output is rich in harmonics, making this oscillator useful for calibrations and test applications.
Please send your ideas, which are very important for our success…
Amiable post and this enter helped me alot in my college assignement. Thanks you for your information.
Interesting and useful information. I just wanna tell U “Thanks”. Thanks!
update electronic
I’m planing to use same schematics with a 74HC00D chip to generate about 18MHz for ARM7 microcontroller source clock.
Thank you so much for your circuit. It’s very helpful to me!