18QHTF21-37.400-PD

Oscillators Overview

The 18QHTF21-37.400-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a standard frequency of 37.4 MHz and utilizes LVCMOS output logic. 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 suitable for surface-mount applications.

Oscillators Feature Summary

• Supports low-voltage operation with integrated standby capability
• Provides stable LVCMOS signal output for digital circuits
• Designed for surface-mount integration in space-constrained layouts

Oscillators Applications

• Digital clock generation for microprocessors
• Timing reference for communication interfaces
• Synchronization in consumer electronic devices

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the specified operating range to ensure reliable oscillator performance. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet.

Oscillators Selection Notes

Select this component when a precise 37.4 MHz timing source is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage constraint and the availability of the standby feature for power-sensitive designs. Evaluate the thermal and mechanical constraints of the 4-SMD package relative to the assembly process.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent LVCMOS outputs and low-voltage support. The suffix PD indicates the inclusion of a power-down or standby control feature, distinguishing it from continuously running variants within the same family.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series parts with identical pinout and electrical characteristics but different frequencies, such as 18QHTF21-50.000-PD or 18QHTF21-6.760-PD, provided the system timing requirements allow for frequency adjustment.