18QHTF21-111.111-PD

Overview

The 18QHTF21-111.111-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 111.111 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Features a dedicated standby mode to reduce power consumption during idle periods
• Utilizes a leadless surface-mount package design for space-constrained applications

Applications

• High-speed data communication systems requiring precise clock signals
• Embedded processing units needing stable timing references
• Network infrastructure equipment utilizing specific frequency standards

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design specifications before procurement. Ensure that the 1.8V supply rail is stable and within the operational limits defined in the official datasheet. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly errors during manufacturing.

Selection Notes

Select this component when a 111.111 MHz frequency is strictly required for system synchronization. Consider the low-profile 2.0x1.6mm package if vertical space is limited. The LVCMOS output is suitable for direct interfacing with standard CMOS logic families without additional level shifting components.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in frequency control products. The series typically offers various frequencies and voltage options. Mercury Electronic Ind. Co. Ltd has a long history in quartz crystal manufacturing, providing reliable timing solutions for industrial and commercial electronics markets globally.

Replacement Considerations

Direct substitutes must match the 111.111 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering equivalent XO specifications to ensure functional parity.