18QHTF21-6.560-PD

Overview

The 18QHTF21-6.560-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind., Co., Ltd. It operates at a nominal frequency of 6.56 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function to manage power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range suitable for general electronic applications.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby mode for power management
• Compact surface-mount package design

Applications

• Portable consumer electronics
• Battery-powered devices
• General-purpose digital circuits requiring precise timing

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a low-voltage, small-footprint oscillator is required for timing signals around 6.56 MHz. Consider the LVCMOS output level compatibility with downstream logic gates. Evaluate the power-down feature necessity for energy-sensitive designs. Compare performance metrics such as phase noise and jitter if high-precision timing is critical for the application environment.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-profile crystal oscillators. The series typically offers various frequencies within a standardized 2.0x1.6mm package. The 'PD' suffix indicates the inclusion of a power-down pin or functionality, distinguishing it from continuous-operation variants within the same family.

Replacement Considerations

Direct replacements must match the 6.56 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-profile XO components with standby capabilities.