18QHTF21-13.578906-OE

Overview

The 18QHTF21-13.578906-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.578906 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes hardware enable and disable functionality for power management
• Utilizes a leadless surface-mount package for space-constrained designs

Applications

• Clock signal generation for embedded systems
• Timing reference for consumer electronics
• Data communication interface synchronization

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 4-SMD no-lead package specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a precise 13.578906 MHz timing source is required for low-voltage digital circuits. The choice is driven by the need for LVCMOS compatibility and the availability of an enable pin for dynamic power control. Consider the small form factor as a primary constraint for portable or dense electronic assemblies requiring reliable clock distribution.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies within a consistent 2.0x1.6mm package. It serves as a fundamental timing element in modern electronics, replacing discrete crystal resonators by providing a ready-made square wave signal directly compatible with microcontrollers and logic gates.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with different frequencies such as 18QHTF21-37.888-OE or 18QHTF21-96.768-OE if frequency adjustment is permissible. Cross-brand replacements must match the 1.8V LVCMOS specification and 4-SMD no-lead footprint to ensure board compatibility without redesign.