18QHTF21-6.7458-OE

Overview

The 18QHTF21-6.7458-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 6.7458 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, featuring a supply voltage of 1.8V. It supports an Enable/Disable function for power management and includes a Standby mode. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. It is rated for an operating temperature range of -40°C to 85°C and offers frequency stability of ±50ppm.

Feature Summary

• Supports Enable/Disable functionality for active power control
• Includes Standby mode for reduced power consumption
• Compact 4-SMD No Lead surface-mount package design
• LVCMOS output logic compatible with digital interfaces

Applications

• Portable electronic devices requiring low-power clock sources
• Embedded systems utilizing 1.8V logic levels
• Consumer electronics with space-constrained PCB layouts
• Industrial control modules operating within extended temperature ranges

Procurement Notes

Verify the specific ordering suffix against official Mercury Electronics documentation to confirm functional attributes such as enable/disable capabilities and standby modes. Ensure the selected variant matches the required frequency tolerance and operating temperature range for your application environment. Cross-reference the package outline drawing to confirm mechanical fitment on the target PCB footprint.

Selection Notes

Select this component when a low-profile, 1.8V LVCMOS oscillator is required for timing applications. Consider the ±50ppm frequency stability specification relative to system jitter requirements. Evaluate the thermal performance within the -40°C to 85°C range against the expected ambient conditions. Confirm that the Enable/Disable pinout aligns with the host controller's GPIO configuration for proper power sequencing.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series is characterized by small form factors suitable for modern portable electronics. Variants within this family typically share similar electrical characteristics but differ in frequency, package size, or specific control features like standby modes.

Replacement Considerations

Direct substitutes must match the 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify equivalent frequency stability and operating temperature ranges. Check for compatible Enable/Disable pin configurations if power management is critical to the design.