18QHTF21-40.665-PD

Oscillators Overview

The 18QHTF21-40.665-PD is a 40.665 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates with a standard LVCMOS output logic and requires a 1.8V supply voltage. The device features a power-down function, allowing for standby mode control to reduce power consumption when not in active use. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise clock signals with low power requirements.

Oscillators Feature Summary

• Supports LVCMOS output logic for standard digital interface compatibility
• Includes power-down functionality for energy-efficient standby operation
• Utilizes a small form factor SMD package suitable for space-constrained designs

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Communication equipment requiring stable frequency sources

Oscillators Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your system design before procurement. Ensure that the 1.8V supply voltage aligns with your power management architecture. Confirm that the LVCMOS output levels are compatible with the input thresholds of the receiving circuitry. Check for any specific handling instructions related to the no-lead SMD package during assembly.

Oscillators Selection Notes

Select this oscillator when a 40.665 MHz frequency is required alongside low voltage operation. Consider the power-down feature if battery life or thermal management is a priority. The compact 2.0x1.6mm footprint makes it suitable for dense PCB layouts. Evaluate the need for LVCMOS outputs versus other logic families to ensure signal integrity across the board.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal oscillators. The manufacturer has a long history in Taiwan's crystal industry, providing reliable frequency control products. The series typically offers various frequencies and supply voltages, catering to diverse electronic application needs with standardized packaging options.

Oscillators Replacement Considerations

Direct replacements may include other 40.665 MHz LVCMOS oscillators in similar 4-SMD packages from different manufacturers. Verify pinout compatibility and electrical specifications such as jitter and phase noise. Ensure the replacement supports the same 1.8V supply and power-down functionality to maintain system behavior.