18QHTF21-80.990928-OE

Overview

The 18QHTF21-80.990928-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 80.990928 MHz and utilizes LVCMOS output logic. The device is designed for low voltage operation with 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 with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount applications.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• General clock signal generation in embedded systems
• Timing reference for microprocessors and FPGAs
• Data communication interfaces requiring precise clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the enable pin logic levels are compatible with your controlling GPIO. Check the operating temperature range specifications to ensure reliability under your intended environmental conditions. Validate the package footprint against your PCB layout guidelines.

Selection Notes

Select this component when a stable 80.990928 MHz clock source is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage as a primary constraint for power supply design. The small 2.0x1.6mm footprint makes it suitable for high-density board layouts. Evaluate the need for active enable/disable control versus always-on operation based on system power efficiency goals.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a consistent 4-SMD package form factor. Mercury Electronics specializes in quartz crystals and frequency control products, providing reliable timing solutions for industrial and consumer electronics markets.

Replacement Considerations

Direct substitutes must match the 80.990928 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify electrical parameters such as jitter and phase noise if strict timing performance is critical. Cross-reference pinouts and enable logic polarity to ensure functional compatibility without hardware modification.