The HC-49USX is a low-profile, through-hole quartz crystal designed for stable frequency operation in electronic circuits. It is packaged in a resistance-welded ceramic case with dimensions matching the standard HC-49USX form factor. The part operates over a temperature range of -10°C to +70°C with a frequency stability of ±50 ppm across that range and a frequency tolerance of ±30 ppm at +25°C. It supports frequencies from 3.570 MHz to 70.000 MHz, with equivalent series resistance ranging from 30 Ω to 200 Ω depending on frequency and mode, and operates at a maximum drive level of 500 μW. Load capacitance is specified in the part number, and the crystal meets RoHS compliance standards with MSL 1 rating. The part uses fundamental or third overtone oscillation modes, as determined by frequency selection.
Despite the rise in popularity of surface mount technology (SMT) in passive components, through hole packaging has remained an industry staple for eight decades for a reason. The simplicity and efficacy of this technology, along with its ability to be incorporated into a vast array of designs, make it an excellent choice for many different applications.
Crystals with through hole packing are ideal for larger components that will undergo a significant amount of mechanical stress, high voltage, and/or high power. This is because through hole soldering results in a stronger bond between the passive components and the circuit board. Example applications include transformers, connectors, semiconductors and electrolytic capacitors.
Other advantages to using through hole-mounted components include the compact design to decrease the component’s footprint on the circuit board, exceptional shock and vibration resistance, low frequencies and options for industrial temperature ranges and excellent aging and component longevity and durability.
10MHz ±30ppm Crystal 18pF 60 Ohms HC-49/US
| ECS Inc. International | DigiKey | Shenzhen Shengyu Electronics Technology Limited | |
|---|---|---|---|
| Product Category | Crystals | Crystals | Crystals |
| Product Number | ECS-100-18-4X | X1080-ND | ECS-100-18-4X |
| Product Name | Through Hole Crystals | Crystals | Crystals |
| Package / Form Factor | Through Hole Crystals | Through Hole; HC-49/US | Through Hole |
| Features / Standards | RoHS | Lead-Free | |
| Frequency | 10 MHz | 10 MHz | |
| Frequency Stability | 50 ppm | 50 ppm |
