18QHTF21-6.758-PD

Overview

The 18QHTF21-6.758-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 6.758 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for timing applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

• Supports low voltage operation at 1.8V for efficient power consumption
• Includes standby mode capability to reduce current draw during idle periods
• Utilizes LVCMOS output interface for direct digital logic compatibility
• Employes a small form factor SMD package suitable for high-density PCB layouts

Applications

• Battery-powered portable consumer electronics
• Compact embedded control systems
• Digital signal processing interfaces
• Microcontroller clock 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 rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to prevent assembly errors. Check for any specific handling instructions regarding electrostatic discharge sensitivity during installation.

Selection Notes

Select this component when a low-voltage, small-footprint clock source is required for digital circuits. Consider the LVCMOS output compatibility with downstream logic families. Evaluate the standby feature necessity for power-sensitive designs. Compare size constraints against larger packages if higher power or different frequencies are needed. Verify temperature range suitability for the intended operating environment.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0x1.6mm package. These oscillators are designed for general-purpose timing applications where space and power efficiency are critical. The 'PD' suffix indicates the inclusion of a power-down pin functionality.

Replacement Considerations

Direct substitutes may include other 1.8V LVCMOS oscillators in 2.0x1.6mm packages from manufacturers such as Epson, Seiko Epson, or Nihon Dempa Kogyo. Ensure replacement parts match the 6.758 MHz frequency, output logic type, and pin configuration. Verify thermal and electrical characteristics align with the original design specifications.