18QHTF21-12.459-PD

Overview

The 18QHTF21-12.459-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 12.459 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power reduction
• Compact 4-SMD no-lead surface mount form factor

Applications

• Digital clock signal generation
• Microcontroller timing references
• Communication interface synchronization

Procurement Notes

Verify the specific ordering suffix to ensure correct voltage and frequency specifications. Confirm that the 4-SMD no-lead package matches the PCB footprint requirements. Check datasheet parameters for operating temperature range and load capacitance before integration into the design.

Selection Notes

Select this component when a 1.8V supply and 12.459 MHz frequency are required. Ensure the LVCMOS output level aligns with the receiving circuit's input thresholds. Consider the small 4-SMD package size for space-constrained layouts.

Part Context

Mercury Electronic Ind. Co., Ltd. is a Taiwan-based manufacturer specializing in quartz crystals and oscillators. This part belongs to their series of standard XO devices, providing stable clock sources for electronic systems.

Replacement Considerations

Cross-reference with other 12.459 MHz LVCMOS oscillators in 4-SMD packages. Verify pinout compatibility and electrical parameter equivalence before substitution.