4-Pin Crystal Clock Oscillator, TTL 5V, Multiple Frequencies
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Prices updated: 13 Oct 2026
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About this product
A 4-pin crystal clock oscillator module that outputs a complete TTL-level clock signal, so the circuit needs no external oscillator components. It operates from 5 V and is available in frequencies from 1 MHz to 40 MHz. Used to clock microprocessors, microcontrollers and TTL or digital logic circuits.
Specifications
- Number of pins
- 4
- Output type
- TTL level clock
- Operating voltage
- 5 V
- Available frequencies
- 1, 2, 4, 8, 12, 16, 20, 27, 40 MHz
- Type
- Complete crystal clock oscillator
Frequently asked questions
What does each pin do on a 4-pin oscillator?
Typically the pins are VCC, GND, the clock output, and one pin that is not connected or used for enable, depending on the manufacturer. Check the marking or datasheet, since the function of pin 1 varies.
Can it provide the clock for an Arduino Uno?
The Uno's ATmega328P normally runs at 16 MHz from its own crystal circuit, and a 16 MHz version is listed. Replacing the crystal with an external clock requires feeding the clock to the correct pin and changing the fuse settings, so check the ATmega328P datasheet first.
