18QHTF21-121.429-PD

Overview

The 18QHTF21-121.429-PD is a crystal oscillator (XO) from Mercury Electronics Ind. Co. Ltd., operating at a frequency of 121.429 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a standby or power-down capability for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. This component is designed for applications requiring precise timing signals in space-constrained electronic systems.

Feature Summary

• Provides stable 121.429 MHz clock signal generation via LVCMOS interface
• Operates on a low 1.8V power supply for efficient energy consumption
• Includes standby mode functionality to reduce power usage during idle periods
• Utilizes a small 4-SMD no-lead surface mount package for board space optimization

Applications

• High-speed digital data transmission systems
• Network communication equipment requiring precise timing
• Embedded systems with limited power budgets
• Consumer electronics utilizing compact form factors

Procurement Notes

Verify the specific ordering suffix PD against manufacturer documentation to ensure correct packaging and handling specifications. Confirm that the 1.8V supply voltage aligns with your system design requirements before procurement. Check for RoHS compliance status if environmental regulations apply to your manufacturing process. Ensure compatibility with the 4-SMD no-lead footprint during PCB layout finalization.

Selection Notes

Select this oscillator when a 121.429 MHz frequency is strictly required for system synchronization. Consider the 1.8V operating voltage to match low-power logic families. Evaluate the 2.0x1.6mm package size against available PCB real estate constraints. Assess the need for power-down capabilities if dynamic power management is critical for the application's battery life or thermal performance.

Part Context

Mercury Electronics Ind. Co. Ltd. has manufactured frequency control products since 1973, establishing itself as a pioneer in quartz crystal manufacturing in Taiwan. The company expanded its product range from lead-type crystals to surface-mount oscillators, covering frequencies from several KHz to hundreds of MHz. This part belongs to their standard XO series, reflecting their long-standing expertise in precision timing components.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided source material. Cross-referencing requires matching frequency, voltage, package, and output logic specifications with alternative manufacturers.