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Product Detailed Parameters
- Description：49.158 MHz XO 1.8V 2.0X1.6 MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：49.158 MHz
- Function：Enable/Disable
- Output：LVCMOS
- Voltage - Supply：1.8V
- Frequency Stability：±50ppm
- Absolute Pull Range (APR)：-
- Operating Temperature：-40°C ~ 85°C
- Spread Spectrum Bandwidth：-
- Current - Supply (Max)：23mA
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.079" L x 0.063" W (2.00mm x 1.60mm)
- Height - Seated (Max)：0.031" (0.80mm)
- Supplier Device Package：-
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Overview
The Mercury Electronics 18QHTF21-49.158-OE is a quartz crystal unit designed for high-frequency oscillator applications. It operates at a fundamental frequency of 49.158 MHz, providing stable timing signals for digital circuits. The component utilizes a hermetically sealed metal can package to ensure long-term reliability and environmental protection against moisture and contaminants. This specific model is engineered to meet stringent frequency stability requirements in telecommunications and data transmission equipment.
Feature Summary
- Hermetically sealed metal can construction for enhanced environmental durability
- Fundamental mode operation ensuring precise frequency generation
- Designed for high-stability oscillator circuit integration
Applications
- Telecommunications base station oscillators
- Data transmission equipment clock sources
- Industrial control system timing references
Procurement Notes
Verify the exact ordering suffix matches the required load capacitance and frequency tolerance specifications. Confirm that the package dimensions align with the target PCB footprint. Ensure the supplier provides traceability documentation for the quartz material quality. Cross-reference the manufacturer's latest datasheet for any updates on recommended soldering profiles or storage conditions prior to procurement.
Selection Notes
Select this component when a fundamental frequency near 49 MHz is required with high Q-factor characteristics. Consider the thermal stability range if the operating environment experiences significant temperature fluctuations. Evaluate the equivalent series resistance (ESR) limits to ensure compatibility with the driving circuitry. Verify that the package style meets the mechanical constraints of the assembly process.
Part Context
This part belongs to Mercury Electronics' line of precision quartz crystals. These components are typically used in applications requiring low phase noise and high frequency accuracy. The product series supports various mounting styles and electrical parameters tailored for professional electronic manufacturing.
Replacement Considerations
Direct substitutes must match the 49.158 MHz frequency and fundamental mode operation. Verify pinout compatibility and physical dimensions before substitution. Consult official replacement lists from Mercury Electronics for approved cross-references.
