18QHTF21-49.090-PD

Overview

The 18QHTF21-49.090-PD is a 49.09 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and features an LVCMOS output signal. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. It supports a standby power-down mode for energy efficiency. The device is designed for surface-mount applications requiring precise frequency control in low-voltage digital circuits.

Feature Summary

• LVCMOS output interface for standard logic compatibility
• Integrated standby power-down capability to reduce consumption
• Compact 4-SMD no-lead surface mount packaging

Applications

• Portable consumer electronics requiring low power
• Communication modules needing stable clock signals
• Embedded systems with limited voltage headroom

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against the specific application circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions to avoid assembly issues. Check for any specific reflow soldering profile recommendations provided by the manufacturer to maintain component integrity during manufacturing.

Selection Notes

Select this component when a small form factor and low voltage operation are critical constraints. Compare it against other Mercury oscillators if higher frequencies or different output types like HCSL are needed. Consider the ±50 ppm stability typical for this series if the application allows for minor frequency drift. Evaluate alternative packages if space constraints differ from the 2.0x1.6 mm requirement.

Part Context

This part belongs to the 18QHTF21 series of ultra-small crystal oscillators from Mercury Electronics. The series is characterized by its miniature size and low power consumption, making it suitable for modern miniaturized electronic devices. It complements larger through-hole crystals and standard SMD oscillators by offering a balance between performance and physical footprint.