18QHTF21-57.633667-PD

Overview

The 18QHTF21-57.633667-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 57.633667 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function to manage power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is engineered for applications requiring precise timing signals in space-constrained electronic systems.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Includes standby control functionality to enable power-down states
• Utilizes a leadless surface-mount package for automated assembly

Applications

• Clock generation for embedded processors
• Timing reference for communication interfaces
• Synchronization circuits in portable electronics

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to prevent soldering defects during assembly.

Selection Notes

Select this model when a low-voltage 1.8V operation is required alongside a specific high-frequency clock signal. The inclusion of a power-down feature makes it suitable for battery-operated devices where energy efficiency is critical. Compare package size constraints against alternative oscillators to ensure mechanical fit within the enclosure design.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor oscillators. The series typically offers various frequencies and voltage options. The 'PD' suffix indicates the presence of a power-down pin or control mechanism, distinguishing it from standard continuous-operation variants within the same physical package family.

Replacement Considerations

Direct substitutes must match the 57.633667 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify if the replacement supports the standby function. Cross-reference pinouts and thermal characteristics to ensure electrical and mechanical compatibility without redesigning the host board.