18QHTF21-13.539-PD

Overview

The 18QHTF21-13.539-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 13.539 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes Standby (Power Down) functionality to reduce power consumption
• Designed for low voltage operation at 1.8V

Applications

• Battery-powered portable devices
• General purpose timing clock applications
• Digital signal processing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD No Lead package footprint matches the PCB layout design to prevent assembly issues during manufacturing.

Selection Notes

Select this component when a precise 13.539 MHz clock signal is required for low-power digital systems. The choice is driven by the need for LVCMOS compatibility and the ability to enter a power-down state. Consider the small 2.0x1.6mm form factor for space-constrained designs requiring reliable quartz-based timing.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in frequency control products including quartz crystals and oscillators. The manufacturer has produced these components since 1973, establishing expertise in Taiwan's crystal industry. The series typically offers various frequencies within a standardized low-profile SMD package.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants such as 18QHTF21-18.1059-PD or 18QHTF21-50.2067-PD if different frequencies are acceptable. Verify pinout and electrical characteristics match before swapping.