18QHTF21-42.954-PD

Oscillators Overview

The 18QHTF21-42.954-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 42.954 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function via a standby control input. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. This component is engineered for applications requiring precise clock signals in low-voltage digital systems.

Oscillators Feature Summary

• Integrates LVCMOS output logic for direct interfacing with digital circuits
• Includes standby control functionality to enable power-down mode
• Utilizes a small form factor 4-SMD no-lead surface mount package

Oscillators Applications

• General purpose clock generation for digital systems
• Low voltage embedded circuit timing references
• Portable electronic devices requiring compact oscillators

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your power architecture. Ensure the PCB footprint matches the 2.0x1.6mm 4-SMD no-lead package specifications to guarantee proper soldering and mechanical stability during assembly processes.

Oscillators Selection Notes

Select this model when a 42.954 MHz clock signal is required with LVCMOS compatibility. Consider the 1.8V operating voltage constraint and the availability of a standby pin for power management. Evaluate the physical space constraints to ensure the 2.0x1.6mm package fits within the designated area on the printed circuit board layout.

Oscillators Part Context

This part belongs to the Mercury Electronics SMD oscillator series, specifically designed for standard clock applications. The 'PD' suffix indicates the inclusion of a power-down feature. The product line emphasizes compact size and low voltage operation, catering to modern portable electronics and high-density circuit board designs where space and power efficiency are critical factors.

Oscillators Replacement Considerations

Direct substitutes must match the 42.954 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering equivalent XO specifications if Mercury Electronics parts are unavailable.