18QHTF21-12.498375-PD

Overview

The 18QHTF21-12.498375-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 12.498375 MHz and utilizes LVCMOS output logic. The device is designed for low voltage applications, featuring a supply voltage of 1.8V. It includes a power-down feature for standby mode control. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features a power-down function to enable standby mode operation
• Designed for low-voltage 1.8V supply requirements

Applications

• General purpose clock signal generation
• Embedded systems requiring precise timing references
• Portable electronic devices utilizing low-voltage logic

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your application environment.

Selection Notes

Select this component when a precise 12.498375 MHz reference is required in space-constrained designs. The 1.8V operation makes it suitable for modern low-power digital circuits. Consider the LVCMOS output level if interfacing directly with CMOS-compatible inputs without additional buffering. The small 2.0x1.6mm package allows for high-density board layouts compared to larger oscillator packages.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature surface-mount oscillators. The series typically offers various frequencies within a standardized small form factor. Mercury Electronics specializes in frequency control products including crystals and oscillators, providing timing solutions for consumer and industrial electronics markets globally.

Replacement Considerations

Direct replacements must match the 12.498375 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications. Cross-reference with other manufacturers offering equivalent low-profile XO components.