Description
The HC-49US 27.12 MHz Crystal is a high-precision quartz resonator that serves as a critical frequency reference in a wide array of RF applications. The 27.12 MHz frequency is one of the most widely used industrial, scientific, and medical (ISM) band frequencies globally, making it a cornerstone component for short-range wireless communication, remote controls, and various radio-frequency identification systems.
Housed in the robust and globally compatible HC-49US 2-pin through-hole package, this crystal offers exceptional mechanical stability and ease of integration. Its resistance-welded, hermetically sealed enclosure provides excellent protection against environmental degradation such as humidity, thermal stress, and oxidation. With a tight 20 PPM frequency tolerance and a 20 pF load capacitance, it ensures the precise, low-jitter performance required for stable carrier-wave generation and reliable signal modulation in wireless devices.
Key Features
- Versatile ISM Band Frequency: 27.12 MHz is a standard frequency used in diverse RF modules, remote controls, and short-range wireless systems.
- High Accuracy: Tight frequency tolerance of 20 PPM minimizes frequency drift, crucial for maintaining signal integrity in RF circuits.
- Standardized Footprint: The 2-pin HC-49US DIP package ensures universal compatibility with standard oscillator and RF transmitter circuits.
- Robust Construction: Resistance-welded, hermetically sealed package provides high environmental reliability.
- Optimized Load: 20 pF load capacitance is matched to common RF oscillator driver stages for consistent start-up and stability.
Application
- RF Remote Control Transmitters
- Short-Range Wireless Data Links
- General-Purpose ISM Band RF Systems
- Industrial Wireless Control Units
- Signal Timing and Clocking for RF Modules
Package Includes
- 2 x HC-49US 27.12 MHz Crystal (Through-Hole Package)
Specifications
| Parameter | Specification |
|---|---|
| Part Number | HC-49US |
| Frequency | 27.12 MHz |
| Load Capacitance | 20 pF |
| Frequency Tolerance | 20 PPM |
| Mounting Type | Through-Hole (2-Pin) |









