18QHTF21-40.120-PD

Oscillators Overview

The 18QHTF21-40.120-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 40.12 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down standby function for energy efficiency. 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 power-down standby capability
• Utilizes LVCMOS output interface

Oscillators Applications

• General timing clock generation
• Embedded system synchronization
• Digital signal processing interfaces

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 40.12 MHz reference is required for low-power applications. The integrated power-down feature makes it suitable for battery-operated devices where standby current consumption must be minimized. Ensure compatibility with LVCMOS logic levels used in the target microcontroller or FPGA to avoid signal integrity issues.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequency options within a standardized small form factor. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation variants in the same package family.

Oscillators Replacement Considerations

Direct substitutes include other 40.12 MHz XO components with identical 1.8V LVCMOS specifications and 2.0x1.6mm footprints. Verify pinout compatibility and electrical parameters such as phase noise and jitter before swapping manufacturers.