18QHTF21-123.123456-PD

Overview

The 18QHTF21-123.123456-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 123.123456 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, designed for surface-mount applications.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby and power-down functionality to reduce power consumption
• Utilizes a leadless 4-SMD surface-mount package for board integration

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing standard frequency references
• Embedded systems with low-voltage power constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout specifications. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a stable 123.123456 MHz reference is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage as a primary constraint for power budgeting. The standby feature makes it suitable for battery-operated or power-sensitive designs. Evaluate the physical dimensions of the 4-SMD package against available board space.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies within the LVCMOS logic family. Mercury Electronics is a established manufacturer of frequency control products, providing quartz-based solutions for industrial and consumer electronics markets.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinouts and electrical characteristics but different frequencies, such as the 18QHTF21-51.200-PD or 18QHTF21-44.530-PD, provided the system can accommodate the frequency change. Cross-brand replacements require matching LVCMOS logic, 1.8V supply, and 4-SMD no-lead packaging.