18QHTF21-6.536-PD

Overview

The 18QHTF21-6.536-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 6.536 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to reduce consumption during inactive periods. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is suitable for applications requiring precise timing signals in low-voltage digital circuits.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital systems
• Includes standby mode capability for power management
• Compact surface-mount package design

Applications

• Portable electronic devices
• Battery-powered equipment
• General-purpose digital timing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package footprint matches your PCB layout specifications. Check for any specific handling instructions regarding ESD sensitivity associated with this oscillator type.

Selection Notes

Select this component when a low-profile, low-voltage oscillator is required for space-constrained designs. The 1.8V operation makes it suitable for modern portable electronics where power efficiency is critical. Consider the 6.536 MHz frequency if it matches your clock input requirements directly. Evaluate the standby feature benefits if power conservation during idle states is a priority for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-footprint crystal oscillators. The series typically offers various frequencies and voltages, catering to diverse timing needs in consumer and industrial electronics. The 'PD' suffix likely indicates the presence of a power-down pin or functionality, enhancing its utility in energy-sensitive applications compared to standard continuous-operation oscillators.

Replacement Considerations

Direct replacements must match the 6.536 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package size. Verify pin compatibility and electrical characteristics such as phase noise and jitter if strict signal integrity is required. Consult manufacturer cross-reference lists for verified equivalents.