18QHTF21-40.490-PD

Oscillators Overview

The 18QHTF21-40.490-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 40.49 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby function for power down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports low voltage operation at 1.8V
• Includes standby mode for power management
• Utilizes LVCMOS output interface

Oscillators Applications

• General purpose clock signal generation
• Digital circuit timing reference
• Embedded system synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 40.49 MHz clock source is required for low-power digital applications. The choice depends on the necessity for LVCMOS compatibility and the constraint of a 1.8V operating environment. Consider the small form factor if space is limited on the circuit board. Validate thermal performance within the specified operating temperature range for the intended deployment scenario.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature surface-mount oscillators. The series typically offers various frequencies within a similar physical footprint. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from non-controlled variants in the same family.

Oscillators Replacement Considerations

Direct substitutes must match the 40.49 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility for the power-down function. Cross-reference with other manufacturers offering equivalent SMD oscillators ensuring identical electrical parameters and thermal characteristics.