18QHTF21-57.7483-PD

Overview

The 18QHTF21-57.7483-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 57.7483 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and supports a Standby (Power Down) function for power management. Frequency stability is rated at ±50ppm, ensuring precise timing performance. The component is designed to operate within an extended temperature range of -40°C to 85°C. It utilizes a compact 4-SMD, No Lead package, suitable for surface-mount applications in space-constrained electronic designs.

Feature Summary

• Supports Standby (Power Down) mode for efficient power management
• Delivers LVCMOS output signal compatibility
• Operates on a single 1.8V supply voltage
• Maintains ±50ppm frequency stability

Applications

• General-purpose digital timing circuits
• Communication equipment clock sources
• Embedded system microcontroller interfaces
• Consumer electronics timing references

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD No Lead package dimensions fit the PCB footprint requirements. Check for any RoHS compliance certifications if required by project specifications.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling. The ±50ppm stability is suitable for general digital applications rather than high-precision RF systems. Consider the extended industrial temperature range (-40°C to 85°C) for environments subject to thermal variation. The standby feature makes it appropriate for battery-powered or power-sensitive devices.

Part Context

This part belongs to the 18QHTF21 series of quartz crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, typically packaged in small SMD formats. Mercury Electronics is a Taiwan-based manufacturer specializing in frequency control products, including crystals, filters, and oscillators, established since 1973.

Replacement Considerations

Compatible substitutes include other 57.7483 MHz LVCMOS oscillators with 1.8V supply and similar package dimensions. Verify pinout compatibility and electrical parameters such as load capacitance and drive strength. Ensure the replacement maintains the same standby functionality and temperature rating.