18QHTF21-65.5361-PD

Overview

The 18QHTF21-65.5361-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 65.5361 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and includes a power-down feature accessible via a standby control pin. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated power-down functionality for energy management
• Compact 2.0x1.6mm surface-mount footprint

Applications

• Portable electronic devices requiring low power consumption
• Communication equipment needing stable clock signals
• Embedded systems utilizing LVCMOS-compatible processors

Procurement Notes

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

Selection Notes

Select this component when a 65.5361 MHz clock source is required with LVCMOS outputs. Consider the 1.8V operating voltage and power-down capability for battery-powered or efficiency-critical designs. The small 2.0x1.6mm package is ideal for space-constrained layouts. Verify compatibility with your target load capacitance and frequency stability needs.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series typically offers various frequencies and packages. Mercury Electronics is a Taiwan-based manufacturer with a history in frequency control products since 1973, providing components like TCXOs and VCTCXOs alongside standard XOs.

Replacement Considerations

Direct substitutes may include other 65.5361 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers such as Epson, NDK, or SiTime. Ensure voltage levels, pinout configurations, and electrical specifications match. Verify that the replacement supports the same power-down functionality if required.