Description
The HC-49/SM 4 MHz is a classic, robust quartz crystal resonator housed in a low-profile, surface-mount (SMD) package. With a base frequency of 4 MHz, this crystal is widely used in legacy microcontrollers, low-power embedded systems, and timing applications where a stable, slower clock rate is required to manage power consumption or accommodate specific hardware timing constraints.
The HC-49/SM series is highly regarded for its mechanical reliability and cost-effectiveness. Its standard 11.4mm x 4.7mm footprint makes it easy to integrate into a variety of PCB designs. Whether you are working on industrial controllers, consumer electronics, or basic clock generation for digital logic, this pack of 5 provides a reliable foundation for multiple projects or spare inventory for prototyping.
Features
- 4 MHz nominal frequency
- Industry-standard low-profile HC-49/SM SMD package
- Reliable mechanical and environmental stability
- Wide storage temperature range (-20°C to +70°C)
- Ideal for cost-sensitive and low-power timing applications
- Pack of 5 units included
Applications
- Microprocessor and microcontroller system clocking
- Network card timing references
- Consumer electronics and timing circuits
- Embedded control systems
- General-purpose digital synchronization
Package Includes
- 5 x HC-49/SM 4 MHz Surface Mount Quartz Crystal
Specifications
| Parameter | Specification |
|---|---|
| Part Number | HC-49/SM |
| Frequency | 4 MHz |
| Tolerance | ±30 ppm (standard performance) |
| Operating Temperature | -10 °C to +60 °C |
| Package Dimensions | 11.4 x 4.7 x 3 mm |
| Quantity | Pack of 5 |
| Weight (per unit) | ~1 g |
