18QHTF21-65.537-PD

Overview

The 18QHTF21-65.537-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 65.537 MHz and utilizes LVCMOS output logic. 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 2.00mm x 1.60mm.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features a dedicated standby mode to reduce power consumption
• Utilizes a surface-mount 4-SMD no-lead package design

Applications

• General clock signal generation in electronic circuits
• Timing reference for digital systems requiring 1.8V operation
• Embedded devices utilizing standard XO configurations

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD package footprint matches the PCB layout constraints. Cross-reference the part number suffix to confirm the presence of the power-down feature as documented.

Selection Notes

Select this component when a precise 65.537 MHz timing source is required for low-voltage applications. The LVCMOS output ensures direct interfacing with standard digital logic families without additional level shifting. The inclusion of a power-down pin allows for dynamic power management in battery-operated or energy-efficient designs. Verify thermal performance within the specified operating temperature range.

Part Context

This oscillator belongs to the Mercury Electronics 18QHTF21 series, which provides various frequencies in a small form factor. The series is designed for applications requiring stable clock signals in space-constrained environments. The 'PD' suffix indicates the inclusion of a power-down control capability, distinguishing it from standard continuous-operation variants within the same package family.

Replacement Considerations

Direct substitutes must match the 65.537 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify equivalent electrical characteristics such as phase noise and jitter if critical. Ensure the replacement part also supports the standby function if power management is required.