18QHTF21-13.5785-PD

Overview

The 18QHTF21-13.5785-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.5785 MHz and utilizes LVCMOS output logic levels. 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 direct digital interface compatibility
• Features a dedicated standby mode to reduce power consumption during idle periods
• Utilizes a leadless surface-mount package design for automated assembly

Applications

• Portable electronic devices requiring low-power timing sources
• Consumer electronics utilizing LVCMOS-compatible processors
• Industrial control systems needing stable clock signals

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable within the datasheet specifications. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official mechanical drawing to prevent soldering defects.

Selection Notes

Select this component when a precise 13.5785 MHz reference is required with minimal power draw. The LVCMOS output simplifies interfacing with standard logic families without additional level shifting. Consider the 1.8V operating voltage constraint to ensure compatibility with the target system's power architecture and signal integrity requirements.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has decades of experience in Taiwan producing crystals and oscillators. This series typically offers various frequencies and packaging options for diverse timing applications across consumer and industrial sectors.

Replacement Considerations

Check for exact frequency match and compatible output logic. Verify pinout and package dimensions for direct substitution. Ensure supply voltage and current consumption profiles align with the original design constraints.