18QHTF21-112.500-PD

Overview

The 18QHTF21-112.500-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 112.5 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 2.0mm x 1.6mm.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features a standby mode to reduce power consumption during idle periods
• Utilizes a leadless SMD package for surface-mount assembly

Applications

• Digital signal processing systems requiring precise clocking
• Communication equipment utilizing LVCMOS interfaces
• Portable electronic devices necessitating low-power operation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to guarantee proper solder joint formation and mechanical stability.

Selection Notes

Select this component when a stable 112.5 MHz reference is required for LVCMOS-compatible digital circuits. The choice is driven by the need for low-voltage operation at 1.8V and the integration of power-down capabilities. Consider the physical constraints of the 2.0x1.6mm package size relative to available board space and thermal management requirements within the final assembly.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series offers various frequencies and voltage options, all sharing a common small form-factor package design. Mercury Electronics has a long history in the quartz industry, providing standardized solutions for timing applications across multiple sectors.

Replacement Considerations

Direct substitutes must match the 112.5 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if replacing with components from other manufacturers.