12 MHz Crystal Oscillator – HC-49S Quartz Crystal for Microcontrollers and USB Interfaces
The 12 MHz Crystal Oscillator is a precision quartz component widely used in microcontroller timing, especially for USB-based applications. It provides a stable 12 MHz clock signal, ideal for ensuring accurate operation in devices like ATmega16U2, STM32, and 8051 systems that require USB or other timing-sensitive operations.
 
Key Features:
Stable 12 MHz Frequency
Common frequency for USB communication and microcontroller operation.
Quartz Crystal Technology
Offers excellent stability and low frequency drift over time and temperature.
Through-Hole HC-49S Package
Easy to solder, breadboard-friendly, and widely supported in development setups.
Standard Load Capacitance
Typically used with two 22pF ceramic capacitors for proper oscillator performance.
Low Power Operation
Suitable for embedded systems and battery-powered designs.
 
Applications:
USB-based microcontrollers (e.g., ATmega16U2, STM32)
Frequency generation for communication systems
Microcontroller timing circuits
8051 and similar MCU-based projects
Crystal oscillator in USB-to-serial adapters
Embedded electronics and DIY boards
 
Package Includes:
1 × 12 MHz Crystal Oscillator
 
Specifications:
Frequency: 12 MHz
Tolerance: ±20 ppm (typical)
Load Capacitance: 20pF (typical)
Package Type: HC-49S (Through-hole)
Operating Temperature: -20°C to +70°C
Aging Rate: ±5 ppm/year
Drive Level: 100 µW max
 
Dimensions:
Length: 11 mm
Width: 4.5 mm
Height: 3.5 mm
Lead Pitch: 4.88 mm
 
Weight: Approx. 1 gram
 
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