HC49US-21
21.477 MHz radial leaded crystals with 18pF capacitance
Manufacturer： citizen
series introduction
The HC49US-21 Series is a highly versatile and widely recognized line of quartz crystal oscillators designed to deliver precise frequency control and exceptional stability in a compact, surface-mount package. These oscillators are engineered to meet the demanding requirements of modern electronic systems, offering reliable performance across a broad range of applications. The HC49US-21 Series is particularly known for its robust design, high-quality quartz crystal material, and consistent frequency accuracy, making it a preferred choice for both industrial and consumer electronics.
One of the key features of the HC49US-21 Series is its compact and durable surface-mount design, which ensures easy integration into high-density printed circuit boards (PCBs). The oscillators are constructed using high-grade quartz crystal material, providing excellent frequency stability over a wide temperature range, typically from -20°C to +70°C. This makes them suitable for use in environments where temperature fluctuations are common. Additionally, the series offers a wide range of frequency options, catering to diverse application needs, from low-frequency timing circuits to high-frequency communication systems.
The HC49US-21 Series is designed with a focus on reliability and performance, featuring low equivalent series resistance (ESR) and high-quality factors (Q-factor), which contribute to minimal signal loss and enhanced oscillation stability. These characteristics make the series ideal for applications requiring precise timing and synchronization, such as microcontrollers, embedded systems, and communication modules. Furthermore, the oscillators are available in various load capacitance options, allowing designers to tailor the performance to specific circuit requirements.
Typical applications for the HC49US-21 Series include consumer electronics, such as smartphones, tablets, and wearable devices, where space-saving and reliable timing solutions are critical. They are also widely used in industrial automation, automotive electronics, and telecommunications equipment, where consistent performance under varying environmental conditions is essential. The series’ ability to deliver stable and accurate frequency control makes it a trusted component in systems ranging from IoT devices to advanced networking infrastructure.
In summary, the HC49US-21 Series combines compact design, high reliability, and precise frequency control, making it a versatile solution for a wide array of electronic applications. Its robust construction and adaptability ensure that it meets the needs of modern technology, providing engineers with a dependable component for their timing and synchronization requirements.
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