18QHTF21-3.900-OE

Oscillators Overview

The 18QHTF21-3.900-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 3.9 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an Enable/Disable control pin for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Integrates an enable/disable function for active power management
• Delivers LVCMOS output signal compatibility
• Utilizes a low-profile surface-mount package design

Oscillators Applications

• Portable electronic devices requiring low power consumption
• Communication modules utilizing standard clock signals
• Embedded systems with limited voltage rails

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power architecture. Ensure the 4-SMD no-lead footprint matches the PCB land pattern to guarantee proper soldering and mechanical stability during assembly processes.

Oscillators Selection Notes

Select this component when a precise 3.9 MHz reference is required alongside strict size constraints. The integrated enable pin offers flexibility for power-sensitive designs compared to always-on oscillators. Consider the LVCMOS interface for direct logic compatibility without additional buffering stages in the signal path.

Oscillators Part Context

This model belongs to the 18QHTF21 series from Mercury Electronic, a supplier specializing in quartz timing solutions. The series typically features small form factors suitable for modern miniaturized electronics. Mercury Electronic has established manufacturing capabilities in Taiwan for various frequency control products including crystals and oscillators.

Oscillators Replacement Considerations

Direct substitutes include other 3.9 MHz LVCMOS oscillators in 2.0x1.6mm packages. Verify pinout compatibility and electrical specifications before swapping. Alternative part numbers within the same manufacturer family may offer different tolerances or temperature ranges.