18QHTF21-12.5458-PD

Overview

The 18QHTF21-12.5458-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.5458 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is designed for applications requiring precise timing signals in low-power environments.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby power-down functionality to reduce consumption
• Utilizes a small form factor 4-SMD no lead package

Applications

• Battery-powered portable devices
• Low-power consumer electronics
• Digital signal processing systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Ensure that the 1.8V supply rail stability meets the oscillator's operational limits. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package dimensions to avoid assembly issues. Check for any specific handling instructions regarding electrostatic discharge protection during installation.

Selection Notes

Select this component when a precise 12.5458 MHz clock source is required with minimal power consumption. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the physical size constraints of the application, as the 2.0x1.6mm package is suitable for space-limited designs. Evaluate the need for a power-down feature to extend battery life in portable applications.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 1.8V low-power format. The series is characterized by its compact 4-SMD no lead packaging and LVCMOS outputs. Other variants in the series include different frequencies such as 18.1059 MHz, 51.2 MHz, and 96.768 MHz, sharing similar electrical and mechanical characteristics.

Replacement Considerations

Direct substitutes may include other 12.5458 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package with 1.8V operation. Verify pinout compatibility and electrical parameters such as jitter and phase noise before substitution.