18QHTF21-40.5128-PD

Oscillators Overview

The 18QHTF21-40.5128-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 40.5128 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby power-down mode to reduce consumption when inactive. 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 power-down functionality
• Provides standard LVCMOS signal output

Oscillators Applications

• Digital signal processing circuits
• Communication equipment timing
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable and within the specified operating range. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions exactly to prevent assembly issues. Check for any specific handling instructions regarding electrostatic discharge protection during installation.

Oscillators Selection Notes

Select this component when a precise 40.5128 MHz clock source is required for LVCMOS-compatible digital logic. The choice is driven by the need for low power consumption due to the 1.8V operation and standby feature. Consider the small 2.0x1.6mm package size if space constraints are critical. Ensure the application does not require higher voltage levels or different output drive strengths than LVCMOS provides.

Oscillators Part Context

This part belongs to the QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series is characterized by its small form factor and low power consumption, making it suitable for portable and space-constrained electronic devices. Mercury Electronics is a established supplier of frequency control products, including crystals and oscillators, with a long history in the industry.

Oscillators Replacement Considerations

Direct substitutes must match the 40.5128 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pin compatibility and electrical characteristics such as current consumption and startup time. Generic replacements may differ in stability or phase noise specifications.