18QHTF21-6.770-OE

Overview

The Mercury Electronics 18QHTF21-6.770-OE is a standard crystal oscillator (XO) operating at a frequency of 6.77 MHz. It utilizes an LVCMOS output interface and requires a supply voltage of 1.8V. The device features enable/disable functionality for power management. Frequency stability is rated at ±50 ppm, with an operating temperature range spanning from -40°C to +85°C. The component is housed in a compact 4-SMD, No Lead package measuring 2.0 x 1.6 mm.

Feature Summary

• LVCMOS output interface
• Enable/Disable control function
• Compact SMD package

Applications

• Embedded systems requiring precise timing
• Consumer electronics with low power constraints
• Industrial control modules

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/disable pin configuration matches your microcontroller or logic gate outputs. Check the physical footprint compatibility with your PCB layout to ensure proper soldering and thermal performance during assembly.

Selection Notes

Select this model when a low-voltage 1.8V operation is mandatory for the target application. Consider the ±50 ppm stability sufficient for general digital communication interfaces. Evaluate the small 2.0x1.6mm package size if space constraints are critical. Compare against other Mercury series options if different frequencies or wider temperature ranges are required for specialized environments.

Part Context

This component belongs to the 18QHTF21 series of surface-mount oscillators manufactured by Mercury Electronics Ind. Co. Ltd. The series is designed for applications demanding low power consumption and small form factors. Mercury Electronics specializes in frequency control products, including quartz crystals and oscillators, serving various electronic industries with reliable timing solutions.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinouts but different frequencies, such as 18QHTF21-6.300-OE or 18QHTF21-8.6436-OE, provided the frequency difference is acceptable. Cross-brand replacements must match the 1.8V supply, LVCMOS output, 4-SMD package, and similar stability specifications.