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Product Detailed Parameters
- Description：79.2 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：79.2 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 18QHTF21-79.200-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 79.2 MHz with a frequency stability of ±50 ppm. The device utilizes LVCMOS output logic and functions at a supply voltage of 1.8V. It features an enable/disable control function and is housed in a 4-SMD, no lead package.
Feature Summary
- Standard XO configuration with LVCMOS output
- Integrated enable/disable control functionality
- Compact 4-SMD no lead surface mount package
Applications
- General clock signal generation
- Digital circuit timing references
- Embedded system clock sources
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 power rails. Ensure the 4-SMD footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a stable 79.2 MHz clock source is required for low-voltage digital applications. The LVCMOS interface ensures compatibility with standard logic families. Consider the ±50 ppm stability for applications where moderate frequency precision is sufficient without requiring higher-grade temperature compensation.
Part Context
This part belongs to the QHTF series of quartz oscillators from Mercury Electronics. The series offers various hermetic ceramic leadless SMD packages and multiple supply voltages. It supports a broad frequency range from 1.0 MHz to 200 MHz, providing flexibility for diverse timing needs across different electronic designs.
Replacement Considerations
Direct substitutes include other 79.2 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and envelope dimensions. Cross-reference with Mercury's H21 or similar series if available, ensuring identical electrical parameters and form factor for drop-in replacement.
