18QHTF21-4.897-PD

Oscillators Overview

The 18QHTF21-4.897-PD is a crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 4.897 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down function for standby mode control. 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 power-down capability for energy efficiency
• Provides standard LVCMOS output signals

Oscillators Applications

• General clock signal generation in embedded systems
• Timing reference for digital circuits requiring 4.897 MHz
• Portable electronic devices utilizing low-power oscillators

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD No Lead package footprint matches your PCB layout constraints. Check for any specific automotive or industrial temperature grade requirements if applicable to your application environment.

Oscillators Selection Notes

Select this component when a precise 4.897 MHz timing source is required in space-constrained designs. The 1.8V operating voltage makes it suitable for modern low-power digital logic families. Consider the power-down feature if battery life or thermal management is a priority. Compare performance metrics such as phase noise and stability against alternative oscillators from other manufacturers to ensure compatibility with your system's jitter specifications.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies within a small form factor, catering to applications needing reliable clock sources without occupying significant board space. The 'PD' suffix indicates the inclusion of a power-down pin functionality.

Oscillators Replacement Considerations

Direct substitutes must match the 4.897 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as start-up time and duty cycle before swapping.