18QHTF21-26.990-OE

Oscillators Overview

The 18QHTF21-26.990-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 26.99 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, supporting a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Designed for low-voltage operation at 1.8V
• Utilizes a lead-free 4-SMD surface-mount package

Oscillators Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Digital communication interfaces requiring precise frequency standards
• Consumer electronics with space-constrained designs

Oscillators Procurement Notes

Verify the specific suffix '-OE' against the manufacturer's current catalog to confirm availability and exact specifications. Ensure that the 1.8V supply requirement aligns with the target system design. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check for any recent updates to the datasheet regarding environmental compliance or pinout definitions before finalizing procurement.

Oscillators Selection Notes

Select this component when a stable 26.99 MHz clock source is required for 1.8V logic families. Consider the enable/disable feature if power efficiency is critical during idle states. Evaluate the 4-SMD package dimensions against the available PCB real estate. Ensure that the load capacitance requirements of the host circuit match the oscillator's internal specifications to maintain frequency accuracy.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of low-voltage crystal oscillators. The series typically offers various frequencies and output types within a small form factor. The '18' prefix likely indicates the 1.8V operating voltage range, while 'QHTF' may denote the specific package type or performance class. This model represents a standard XO variant without spread spectrum capabilities.

Oscillators Replacement Considerations

Direct replacements must match the 26.99 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pin-to-pin compatibility and electrical parameters such as phase noise and jitter if specified in the original design. Consult the manufacturer's cross-reference list for approved substitutes.