18QHTF21-75.605-PD

Overview

The 18QHTF21-75.605-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a standard frequency of 75.605 MHz with an LVCMOS output logic type. The device requires a supply voltage of 1.8V and includes a standby (power down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals in low-voltage digital circuits.

Feature Summary

• LVCMOS output interface for direct compatibility with digital logic families
• Integrated standby mode to reduce power consumption during idle periods
• Compact surface-mount package suitable for high-density PCB layouts

Applications

• Digital signal processing systems requiring clock synchronization
• Communication equipment utilizing standard frequency references
• Embedded control units needing low-power oscillation sources

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 4-SMD footprint matches the board layout silkscreen and solder mask definitions. Check for any specific handling instructions regarding electrostatic discharge sensitivity during assembly.

Selection Notes

Select this oscillator when a fixed 75.605 MHz reference is required with LVCMOS compatibility. Consider the 1.8V operating voltage constraint for power budgeting. Evaluate the physical size constraints given the 2.0x1.6mm package dimensions. Assess the need for power-down functionality to meet energy efficiency targets in portable or battery-operated devices.

Part Context

This part belongs to the Mercury Electronics SMD Oscillator series, specifically the H21/H22/H32/H53/SWO product lines as indicated in general documentation. The 'PD' suffix typically denotes the inclusion of a power-down feature. The series is characterized by quartz-based stability and surface-mount convenience for modern electronics manufacturing.

Replacement Considerations

Direct substitutes must match the 75.605 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility if replacing with different manufacturers. Cross-reference with other Mercury models in the same series for potential pin-compatible alternatives.