18QHTF21-68.665-PD

Overview

The 18QHTF21-68.665-PD is a 68.665 MHz crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates with a 1.8V supply voltage and features LVCMOS output logic. The device supports a standby power-down function for energy management. Frequency stability is specified at ±50ppm over the operating temperature range of -40°C to +85°C. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes standby power-down functionality for reduced power consumption
• Designed for high-frequency stability within industrial temperature ranges

Applications

• High-speed digital signal processing systems
• Communication equipment requiring precise clock synchronization
• Embedded systems with strict power constraints

Procurement Notes

Verify that the specific frequency tolerance of ±50ppm meets system requirements. Confirm the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications. Check for any specific handling instructions regarding electrostatic discharge protection during assembly.

Selection Notes

Select this component when a small form factor is required alongside stable clock generation. The LVCMOS interface ensures compatibility with standard logic levels. Consider the ±50ppm stability limit against jitter-sensitive applications. The wide temperature range makes it suitable for diverse environmental conditions without additional thermal management.

Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies while maintaining consistent electrical characteristics and physical dimensions. Mercury Electronics specializes in quartz crystal and oscillator manufacturing, providing reliable frequency control solutions for electronic industries.

Replacement Considerations

Direct replacements must match the 68.665 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and thermal performance. Cross-reference with other Mercury 18QHTF21 variants if frequency adjustments are permissible.