18QHTF21-27.692-PD

Oscillators Overview

The 18QHTF21-27.692-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 27.692 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, requiring a supply voltage of 1.8V. A key functional characteristic is the inclusion of a standby or power-down mode to further reduce energy consumption when the oscillator is not actively in use. The component is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount designs.

Oscillators Feature Summary

• LVCMOS output interface for digital compatibility
• Integrated standby (power-down) functionality
• Low-voltage operation at 1.8V

Oscillators Applications

• General-purpose clock generation in embedded systems
• Timing reference for low-power consumer electronics
• Digital signal processing circuits requiring precise frequency stability

Oscillators Procurement Notes

Verify that the specific suffix '-PD' corresponds to the power-down feature as documented in official Mercury Electronics datasheets. Confirm that the 1.8V supply requirement aligns with your system's power rail capabilities. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Cross-reference the 27.692 MHz frequency against your design specifications to avoid timing errors.

Oscillators Selection Notes

Select this component when a stable 27.692 MHz clock source is required for LVCMOS-compatible logic families. The choice is driven by the need for low power consumption, facilitated by the 1.8V operating voltage and the standby mode. Consider the small 2.0x1.6mm package size if board real estate is limited. This oscillator is appropriate for applications where moderate phase noise and standard accuracy are sufficient.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature surface-mount oscillators. The series typically offers various frequencies within a standardized form factor. The 'PD' suffix indicates the inclusion of a control pin or internal circuitry for power management, distinguishing it from continuous-operation variants in the same product line.

Oscillators Replacement Considerations

Direct substitutes must match the 27.692 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify that any alternative also supports the standby function if power management is critical. Check mechanical height and pad layout compatibility before substitution.