18QHTF21-54.39875-PD

Oscillators Overview

The 18QHTF21-54.39875-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 54.39875 MHz with a frequency stability of ±50ppm. The device utilizes LVCMOS output logic and requires a 1.8V supply voltage. It features a standby mode for power down functionality. The component is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications. The operational temperature range spans from -40°C to 85°C, ensuring reliability across industrial environments.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes standby capability for effective power management
• Designed for surface-mount integration via 4-SMD no-lead packaging

Oscillators Applications

• General clock signal generation for digital circuits
• Timing reference for communication interfaces
• Embedded system clock sources requiring low voltage

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail is stable within the specified operating temperature range of -40°C to 85°C. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to prevent assembly issues. Cross-reference the part number suffix to confirm the exact variant availability from authorized distributors.

Oscillators Selection Notes

Select this component when a precise 54.39875 MHz timing source is required for LVCMOS-compatible logic families. The choice is driven by the need for low power consumption due to the 1.8V supply requirement and the inclusion of a standby feature. Consider the ±50ppm stability specification relative to the system's jitter sensitivity. The industrial temperature rating makes it suitable for broader environmental conditions compared to commercial-grade alternatives.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-profile surface-mount crystal oscillators. The series is characterized by its small form factor and standardized LVCMOS outputs. Mercury Electronic Ind. Co. Ltd has established itself as a manufacturer of frequency control products since 1973, specializing in quartz-based timing solutions including crystals, TCXOs, and VCXOs.

Oscillators Replacement Considerations

Direct substitutes must match the 54.39875 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify equivalent stability and temperature range specifications. Consult distributor databases for cross-references from other manufacturers offering identical pinouts and electrical characteristics.