18QHTF21-36.6666-PD

Oscillators Overview

The 18QHTF21-36.6666-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 36.6666 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a standby mode for power down functionality to conserve energy when not in use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. It is RoHS compliant and classified under Moisture Sensitivity Level (MSL) 1, indicating unlimited exposure to floor life conditions.

Oscillators Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby capability for power management
• RoHS compliant construction

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for low-voltage digital circuits
• Consumer electronics requiring compact oscillators

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout. Check for any specific handling instructions related to the MSL rating during assembly processes.

Oscillators Selection Notes

Select this component when a precise 36.6666 MHz timing source is required for LVCMOS-compatible logic families. The choice is driven by the need for a small form factor (2.0x1.6mm) and low power consumption via the standby feature. It is suitable for designs where a fixed frequency is sufficient and spread spectrum or adjustable frequencies are not needed.

Oscillators Part Context

This part belongs to the QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies within a standard range, all sharing similar electrical characteristics and package dimensions. The 'PD' suffix indicates the inclusion of a power-down pin or function, distinguishing it from non-standby variants in the same physical package family.

Oscillators Replacement Considerations

Direct replacements must match the 36.6666 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify that substitute components support the same standby functionality and meet identical RoHS compliance standards. Cross-reference pinouts to ensure compatibility with existing PCB traces.