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Product Detailed Parameters
- Description：79.944 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：79.944 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)：26mA
- 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 18QHTF21-79.944-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 79.944 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications.
Feature Summary
- LVCMOS output interface
- Enable/Disable control pin
- Surface-mount SMD package
Applications
- General digital clock generation
- Embedded system timing
- Communication equipment
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD footprint matches the PCB layout constraints. Cross-reference the datasheet for operating temperature range specifications to guarantee reliability under intended environmental conditions.
Selection Notes
Select this component when a precise 79.944 MHz clock signal is required with low-voltage operation. The LVCMOS output ensures compatibility with standard digital logic families. The enable feature allows for dynamic power saving in battery-operated devices. Consider the thermal performance and stability characteristics relative to the application's criticality.
Part Context
This part belongs to the AMPMODU series of oscillators from Mercury Electronics. The series offers various frequencies and packages. The 18QHTF21 variant specifically denotes the 4-SMD form factor. Mercury Electronics has produced frequency control products since 1973, establishing expertise in quartz-based timing solutions.
Replacement Considerations
Check for direct substitutes within the same series offering identical frequency and package dimensions. Verify electrical compatibility regarding voltage and output type. Ensure any replacement maintains the required frequency accuracy and stability specifications for the specific application.
