18QHTF21-124.800-PD

Overview

The 18QHTF21-124.800-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 124.8 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component is suitable for applications requiring precise clock signals in low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes standby and power-down functionality for energy efficiency
• Compact 4-SMD no-lead package design for space-constrained layouts

Applications

• Digital signal processing systems requiring 124.8 MHz clock sources
• Communication equipment utilizing LVCMOS interfaces
• Portable electronic devices powered by 1.8V supplies

Procurement Notes

Verify the specific ordering suffix PD against official Mercury Electronics documentation to confirm package type and tape-and-reel specifications. Ensure the 1.8V supply requirement aligns with your system design. Confirm that the 4-SMD no-lead footprint matches your PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this model when a 124.8 MHz frequency is strictly required alongside LVCMOS compatibility. The 1.8V operating voltage makes it appropriate for modern low-power digital logic families. Consider the physical dimensions of the 2.0x1.6 mm package during board space planning. Verify thermal performance requirements relative to the small surface-mount form factor.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of standard crystal oscillators. The series offers various frequencies within a consistent 4-SMD no-lead package format. The manufacturer specializes in quartz crystals and frequency control products, providing standardized solutions for industrial and consumer electronics markets.

Replacement Considerations

Check Mercury Electronics datasheets for other 18QHTF21 variants with different frequencies but identical pinouts. Cross-reference with other manufacturers offering 124.8 MHz LVCMOS oscillators in 2.0x1.6mm packages, ensuring voltage and standby feature compatibility.

FAQ

Does the 18QHTF21-124.800-PD support frequency tuning?

No, this is a standard XO (Crystal Oscillator) with a fixed frequency of 124.8 MHz. It does not support voltage-controlled tuning like a VCXO.

What is the output logic level?

The device uses LVCMOS (Low Voltage Complementary Metal-Oxide-Semiconductor) output logic, compatible with 1.8V digital systems.