18QHTF21-45.1854-PD

Oscillators Overview

The 18QHTF21-45.1854-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 45.1854 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function to manage power consumption. 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 CMOS (LVCMOS) output logic levels
• Includes standby mode capability for power down functionality
• Utilizes a leadless surface-mount package design

Oscillators Applications

• Clock signal generation for digital circuits
• Embedded systems requiring precise timing references
• Communication modules utilizing standard frequency inputs

Oscillators Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target application circuit before procurement. Ensure that the 1.8V supply voltage aligns with the system's power rails. Confirm that the LVCMOS output swing is compatible with the receiving input thresholds of the connected components to guarantee reliable signal integrity.

Oscillators Selection Notes

Select this component when a low-profile, leadless oscillator is required for space-constrained designs. The choice is driven by the need for a 1.8V supply operation and LVCMOS compatibility. Consider the 45.1854 MHz frequency as a fixed parameter; alternative frequencies within the same series may be available if the specific clock rate does not match the system requirements.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has a history of producing quartz crystals and oscillators. This specific model represents a standard XO variant within their portfolio, distinguished by its small form factor and low voltage operation capabilities.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants with different frequencies, such as 18QHTF21-51.200-PD or 18QHTF21-68.665-PD, provided the frequency difference is acceptable. Cross-brand replacements must match the 4-SMD No Lead footprint, 1.8V supply, and LVCMOS output type.