Description
The HC49/S 4 MHz Crystal is a high-stability quartz resonator designed for reliable, low-frequency timing applications. Operating at a fundamental frequency of 4 MHz, this crystal is ideal for power-efficient microcontroller clocking, timers, and communication interfaces where lower clock speeds are preferred to reduce overall system power consumption.
Packaged in the popular HC49/S “low-profile” through-hole package, this component is designed for modern, space-constrained PCB assemblies. With a height of only 3.3 mm, it is significantly flatter than the traditional HC49/U package, making it an excellent choice for compact or thin-profile consumer electronic devices. Its hermetically sealed construction ensures long-term frequency accuracy by protecting the internal quartz element from environmental contaminants.
Key Features
- Power-Efficient Timing: 4 MHz frequency is well-suited for low-power microcontroller operations.
- Low-Profile Package: 3.3 mm height allows for use in compact, space-sensitive designs.
- High Reliability: Hermetically sealed to maintain frequency stability and resist environmental degradation.
- Standardized Mounting: Through-hole design ensures ease of assembly and compatibility with common oscillator circuits.
Application
- Low-Power Microcontroller Systems
- Embedded Timers and Industrial Logic
- Consumer Electronics Control Units
- General-Purpose Digital Clocking
Package Includes
- 5 x HC49/S 4 MHz Quartz Crystal
Specifications
| Parameter | Specification |
|---|---|
| Frequency | 4 MHz |
| Tolerance | ±20 ppm (approx.) |
| Operating Temperature | -10 °C to +60 °C |
| Mounting Type | Through-Hole (HC49/S Low-Profile) |







