18QHTF21-108.069-PD

Overview

The 18QHTF21-108.069-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 108.069 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and includes a standby or power-down control function to manage power consumption during inactive periods. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm by 1.6mm. This component serves as a precise clock source for digital circuits requiring low-voltage operation and minimal footprint.

Feature Summary

• Integrates LVCMOS output interface for direct compatibility with standard digital logic families
• Features integrated standby control mechanism to enable power-down mode for energy efficiency
• Constructed in a small form factor surface-mount package suitable for space-constrained designs

Applications

• Clock generation for high-speed digital signal processing systems
• Timing reference sources for communication interface modules
• Power management circuits requiring precise low-voltage clock signals

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the PCB layout accommodates the 2.0x1.6mm SMD footprint and provides adequate thermal relief for the no-lead package type during assembly processes.

Selection Notes

Select this component when a 108.069 MHz clock signal is required within a 1.8V logic environment. Consider the LVCMOS output swing limits to ensure compatibility with downstream receiver inputs. Evaluate the physical size constraints of the target application to confirm the 2.0x1.6mm package fits the available board real estate without interfering with adjacent components.

Part Context

This part belongs to the Mercury Electronics XO series, which specializes in quartz-based timing solutions. The manufacturer has extensive experience in Taiwan's frequency control industry since 1973. The product line focuses on providing reliable oscillators for various consumer and industrial electronics applications, emphasizing miniaturization and low-power operation capabilities.

Replacement Considerations

Direct substitutes must match the 108.069 MHz frequency, 1.8V supply voltage, and LVCMOS output type. Verify that alternative packages maintain the 2.0x1.6mm footprint or require adapter redesigns. Cross-reference pinout configurations to ensure standby control functionality remains compatible with existing circuit schematics.