18QHTF21-65.975-PD

Overview

The 18QHTF21-65.975-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 65.975 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby and power-down functionality to reduce power consumption
• Utilizes a small form factor 4-SMD no lead package design

Applications

• Digital signal processing circuits
• Communication equipment timing references
• Embedded system clock generation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check for any specific handling requirements related to the surface mount package type during assembly.

Selection Notes

Select this component when a precise 65.975 MHz clock source is required for LVCMOS-based digital circuits. Consider the 1.8V operating voltage and the availability of a power-down mode for power-sensitive designs. Evaluate the physical space constraints as the device uses a 2.0x1.6mm footprint. Ensure that the temperature range specifications meet the operational environment requirements of the target application.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal products. The series typically offers various frequencies and packaging options. Mercury Electronics has a long history in the Taiwan quartz industry, providing frequency control solutions. This specific model represents a standard XO variant optimized for low voltage and small size applications.

Replacement Considerations

Direct substitutes must match the 65.975 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if critical. Cross-reference with other manufacturers offering similar low-profile oscillators with identical electrical parameters.