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Product Detailed Parameters
- Description：66.5432 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：66.5432 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 18QHTF21-66.5432-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.5432 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature for power management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications. The component complies with RoHS standards and has an MSL rating of 1, indicating unlimited moisture sensitivity.
Feature Summary
- Supports active high/low enable or disable functionality for power optimization
- Delivers stable LVCMOS clock signals for digital circuit synchronization
- Utilizes a leadless SMD package for automated surface-mount assembly
Applications
- High-speed data communication interfaces requiring precise timing
- Embedded systems utilizing microcontrollers or FPGAs
- Consumer electronics devices needing low-power clock sources
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your design specifications before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions provided in the official datasheet to prevent assembly errors.
Selection Notes
Select this model when a fixed 66.5432 MHz clock source is required with low power consumption. The enable pin allows for dynamic power control during idle states. Consider the operating temperature range and stability requirements to ensure compatibility with the target application environment and performance needs.
Part Context
This oscillator belongs to the QHTF series from Mercury Electronics, which specializes in quartz-based frequency control products. The company has produced such components since 1973, focusing on reliability and precision. This specific part represents a standard XO solution within their portfolio of oscillators, TCXOs, and VCXOs.
Replacement Considerations
Direct substitutes must match the 66.5432 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify electrical parameters and pinout compatibility before swapping. Generic replacements may differ in stability or size.
