18QHTF21-4.915-PD

Oscillators Overview

The 18QHTF21-4.915-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 4.915 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (standby) function to reduce consumption when inactive. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount applications.

Oscillators Feature Summary

• Integrates LVCMOS output logic for direct digital interface compatibility
• Includes standby mode capability via power-down control
• Utilizes a small-footprint 4-SMD no-lead package design

Oscillators Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for low-voltage digital circuits
• Consumer electronics requiring compact oscillator solutions

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 power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 4.915 MHz timing source is required for 1.8V logic families. Consider the trade-off between the small 2.0x1.6mm form factor and thermal dissipation needs. Evaluate if the LVCMOS output swing is sufficient for the receiving input thresholds without additional buffering or level shifting in the signal path.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series offers various frequencies within a consistent 2.0x1.6mm package. The '-PD' suffix indicates the inclusion of a power-down feature, distinguishing it from basic continuous-operation variants within the same physical footprint family.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series parts with identical 4.915MHz frequency and 1.8V operation, such as 18QHTF21-4.915-OE if an enable pin is preferred over power-down. Cross-brand replacements must match the 2.0x1.6mm package, LVCMOS output, and 1.8V supply constraints.