18QHTF21-44.545-PD

Oscillators Overview

The 18QHTF21-44.545-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 44.545 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is engineered for applications requiring precise timing signals within low-voltage digital systems.

Oscillators Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes standby mode functionality for power management
• Utilizes a leadless SMD package for surface mount assembly

Oscillators Applications

• General purpose clock generation in digital electronics
• Timing reference for microprocessors and memory devices
• Communication interfaces requiring stable clock signals

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. 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 low-profile, leadless oscillator is required for space-constrained designs. The 1.8V operating voltage makes it suitable for modern low-power portable devices. Consider the LVCMOS output compatibility with the receiving logic family. Verify that the 44.545 MHz frequency meets the specific timing needs of the application without requiring external dividers or multipliers.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized small outline package. The series is characterized by its leadless construction and support for standby modes. It serves as a timing source for embedded systems where size and power efficiency are critical constraints compared to larger through-hole or standard SMD oscillators.

Oscillators Replacement Considerations

Direct substitutes must match the 44.545 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Alternative parts from other manufacturers may require schematic review if output drive strength or rise/fall times differ significantly.