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Product Detailed Parameters
- Description：68.8128 MHz XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：68.8128 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 18QHTF21-68.8128-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 68.8128 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a 1.8V supply voltage. It features an integrated enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.
Feature Summary
- LVCMOS output interface
- 1.8V operating voltage
- Enable/Disable control pin
- Surface-mount SMD package
Applications
- Digital signal processing circuits
- Communication equipment timing
- 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 rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to prevent assembly errors.
Selection Notes
Select this component when a precise 68.8128 MHz clock source is required with low power consumption capabilities. The enable/disable feature makes it suitable for battery-operated devices or systems requiring dynamic power management. Consider the LVCMOS compatibility with downstream logic gates and microcontrollers during the design phase.
Part Context
This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based timing solutions. The manufacturer has decades of experience in producing frequency control products, including crystals and oscillators. This specific model represents a standard XO variant optimized for modern low-voltage digital applications.
Replacement Considerations
Direct substitutes must match the 68.8128 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify electrical parameters such as jitter and stability before substitution.
