18QHTF21-45.750-PD

Oscillators Overview

The 18QHTF21-45.750-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 45.750 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and includes a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Oscillators Feature Summary

• Integrates a standby mode to reduce power consumption during inactive periods
• Provides stable LVCMOS signal output for digital circuit interfacing
• Utilizes a lead-free surface-mount package for automated assembly compatibility

Oscillators Applications

• Clock generation for microprocessors and microcontrollers
• Timing reference for data communication interfaces
• Synchronization sources for digital signal processing units

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 rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions to prevent assembly issues. Cross-reference the part number suffix with manufacturer documentation to confirm the exact pinout and electrical characteristics.

Oscillators Selection Notes

Select this component when a low-profile, low-voltage clock source is required for space-constrained designs. The LVCMOS output is suitable for direct connection to most modern digital logic families without additional buffering. Consider the operating temperature range and frequency stability needs relative to the application environment. The integrated power-down feature makes it appropriate for battery-operated or energy-efficient devices.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor timing solutions. The series typically offers various frequency options within a standardized 2.0x1.6 mm package. These components are engineered to replace larger through-hole oscillators or other surface-mount alternatives in portable electronics and compact industrial equipment where board real estate is limited.

Oscillators Replacement Considerations

Direct replacements must match the 45.750 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6 mm package. Verify that substitute parts support the same standby functionality and meet identical electrical performance criteria. Check for pin-to-pin compatibility to ensure seamless integration into existing PCB layouts without redesign.