18QHTF21-38.785317-PD

Oscillators Overview

The 18QHTF21-38.785317-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 38.785317 MHz and utilizes LVCMOS output logic levels. The device functions with a supply voltage of 1.8V and includes a standby or power-down control feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby mode capability
• Provides LVCMOS signal output

Oscillators Applications

• Digital clock distribution systems
• Data communication interface circuits
• Microcontroller system timing sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before ordering. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly errors during manufacturing.

Oscillators Selection Notes

Select this component when a precise 38.785317 MHz reference is required for LVCMOS-compatible digital logic. Consider the 1.8V operating voltage constraint and the availability of a power-down pin for system power management strategies. Evaluate the small form factor suitability for high-density board layouts compared to larger oscillator packages.

Oscillators Part Context

This model belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series typically offers various frequency options within a standardized 2.0x1.6 mm package. The 'PD' suffix indicates the inclusion of a power-down function, distinguishing it from basic continuous-operation variants in the same physical footprint family.

Oscillators Replacement Considerations

Direct substitutes must match the 38.785317 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify equivalent electrical parameters such as phase noise and startup time. Cross-reference with other manufacturers offering identical pinout and thermal characteristics.