18QHTF21-51.666-PD

Overview

The 18QHTF21-51.666-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 51.666 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Standard crystal oscillator design

Applications

• General electronic equipment timing
• Consumer electronics signal processing
• Industrial control systems

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package dimensions fit the PCB footprint constraints. Cross-reference the part number suffix to confirm the exact frequency tolerance and stability specifications required for the application.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The inclusion of a power-down feature makes it suitable for battery-operated devices where standby current reduction is critical. Consider the 4-SMD package size for space-constrained layouts. Verify that the 51.666 MHz frequency meets the system clock requirements without additional dividers.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics Ind. Co. Ltd, which focuses on small-sized SMD oscillators. The series typically offers various frequencies and voltage options. The 'PD' suffix indicates the presence of a power-down pin or function. This specific variant provides a fixed 51.666 MHz output, distinguishing it from other frequencies in the same package family.

Replacement Considerations

Direct substitutes must match the 1.8V supply, LVCMOS output, 4-SMD no-lead package, and 51.666 MHz frequency. Check manufacturer-specific pinouts for power-down functionality compatibility. Verify thermal and electrical specifications against the original datasheet to ensure equivalent performance.