18QHTF21-123.345339-OE

Overview

The 18QHTF21-123.345339-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 123.345339 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes enable/disable functionality. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features integrated enable and disable control capability
• Utilizes a small form factor 4-SMD no lead package design

Applications

• General clock signal generation in electronic circuits
• Timing reference for digital systems requiring 1.8V operation
• Embedded applications utilizing standard XO interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a precise 123.345339 MHz timing source is required within a low-voltage 1.8V environment. Consider the physical constraints of the 2.0x1.6mm package size for space-sensitive designs. Evaluate the need for enable/disable functionality to manage power consumption or system sequencing needs effectively during the selection phase.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has extensive experience in Taiwan's crystal industry since 1973. This specific model represents a standard XO variant optimized for modern surface-mount technology applications requiring reliable timing signals.

Replacement Considerations

Direct substitutes must match the 123.345339 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify electrical parameters such as jitter and phase noise if strict timing performance is critical. Cross-reference pinouts and thermal characteristics to ensure compatibility with existing board layouts.