# Crystals and Oscillators

> Crystals and oscillators for clock signal generation, including programmable I2C frequency modules

- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Category page: https://sigmanortec.ro/en/crystals-and-oscillators
- Category: Electronic components > Crystals and Oscillators
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Products (2)

### 16MHz HC-49S Quartz Oscillator
- Page: https://sigmanortec.ro/en/16mhz-hc-49s-quartz-oscillator
- Details: https://sigmanortec.ro/en/llms/p/495.md
- Price: 1.10 RON
- Availability: In stock; 1-2 zile
- Reference: 33289 · EAN: 5940469171321

16MHz quartz crystal in HC-49S package, used to generate a stable clock signal in microcontrollers and digital circuits. Frequency tolerance ±20ppm, series resistance 30 Ohm, load capacitance 20pF. DIP mounting, dimensions 10.5 x 4.2mm, height 3mm, pin length 13mm.

### Clock frequency generator module, I2C, CJMCU-5351, 3-5V, 8KHz-160MHz
- Page: https://sigmanortec.ro/en/clock-frequency-generator-module-i2c-cjmcu-5351-3-5v-8khz-160mhz
- Details: https://sigmanortec.ro/en/llms/p/1841.md
- Price: 22.36 RON
- Availability: In stock; 1-2 zile
- Reference: 9720 · EAN: 5945327098758
- Specifications: Input Voltage: 3 - 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

CJMCU-5351 clock frequency generator module with MS5351M IC, controlled via I2C (address 0x60). Operates at 3-5V DC and generates frequencies from 8kHz to 160MHz. Provides three independent 3Vpp outputs, configurable through PLLs and dividers, with 100ps pp jitter and 0 ppm frequency error. Compatible with breadboard pins or an optional SMA connector for RF use.