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Product Detailed Parameters
- Description：6.88128 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：6.88128 MHz
- Function：Standby (Power Down)
- 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)：21mA
- 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 18QHTF21-6.88128-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 6.88128 MHz with an LVCMOS output logic type. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount assembly. The component complies with RoHS standards, indicating restricted hazardous substances.
Feature Summary
- LVCMOS output interface for digital signal compatibility
- Integrated standby mode to reduce power consumption
- RoHS compliant construction for environmental safety
Applications
- General clock signal generation in electronic circuits
- Digital system timing references
- Embedded controller 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 package footprint matches the PCB layout constraints. Check for any specific handling instructions regarding electrostatic discharge sensitivity during installation.
Selection Notes
Select this component when a precise 6.88128 MHz reference is required with low power consumption capabilities. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the operating temperature range and stability requirements relative to the application environment. The RoHS compliance ensures adherence to modern environmental regulations.
Part Context
This part belongs to the QHTF series of oscillators from Mercury Electronics, which specializes in frequency control products. The series offers various frequencies and packages tailored for different size and performance needs. Mercury Electronics has been a pioneer in the crystal industry since 1973, providing reliable quartz-based solutions.
Replacement Considerations
Direct substitutes may include other 6.88128 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and electrical specifications such as voltage and current draw. Cross-reference with the manufacturer's official replacement guide for validated alternatives.
