TTL Crystal Oscillator Schematic

TTL Crystal Oscillator Schematic circuit

TTL Crystal Oscillator Schematic

A circuit using one 7400 TTL IC can use crystals of the fundamental type, from 1 to about 15MHz.

TTL Crystal Oscillator circuit diagram

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…

5 comments on “TTL Crystal Oscillator Schematic
  1. Amiable post and this enter helped me alot in my college assignement. Thanks you for your information.

  2. Interesting and useful information. I just wanna tell U “Thanks”. Thanks!

  3. soheila says:

    update electronic

  4. Anonymous says:

    I’m planing to use same schematics with a 74HC00D chip to generate about 18MHz for ARM7 microcontroller source clock.

  5. DDdaihiep says:

    Thank you so much for your circuit. It’s very helpful to me!

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