18QHTF21-11.98135-PD

Overview

The 18QHTF21-11.98135-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 11.98135 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a power-down standby function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes power-down standby functionality to reduce consumption
• Utilizes a leadless surface-mount package for space efficiency

Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Data communication interfaces requiring stable clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail is stable and within the specified operating range. Confirm that the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to avoid assembly issues. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliability.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a specific frequency near 12 MHz. Consider the small form factor if board space is limited. Verify compatibility with LVCMOS logic levels of the receiving device. Evaluate the need for power-down capabilities if energy efficiency during idle states is a priority for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-profile crystal oscillators. The series typically offers various frequencies and voltage options. The 'PD' suffix indicates the inclusion of a power-down control feature. These components are generally used in portable electronics and compact digital devices where size and power consumption are critical constraints.

Replacement Considerations

Direct replacements must match the 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify frequency accuracy and stability specifications. Cross-reference with other Mercury 18QHTF21 variants or similar industry-standard oscillators ensuring identical pinout and electrical characteristics.