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Product Detailed Parameters
- Description：66.66 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：66.66 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 18QHTF21-66.660-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.66 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.
Feature Summary
- Integrates enable/disable functionality for power management
- Utilizes LVCMOS output logic for digital interface compatibility
- Employs quartz crystal technology for frequency stability
Applications
- General clock signal generation in electronic circuits
- Embedded systems requiring precise timing references
- Digital communication interfaces
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 no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a low-profile, surface-mount oscillator with enable control is required. The 1.8V operating voltage suits low-power applications. Consider the 2.0x1.6mm footprint constraints. Verify that LVCMOS output levels are compatible with the receiving logic inputs of the connected microcontroller or FPGA without additional level shifting.
Part Context
This part belongs to the Mercury Electronics SMD oscillator series designed for space-constrained applications. The 'OE' suffix typically denotes the presence of an enable pin. The 18QHTF21 series represents a standard frequency range offering reliable performance for general-purpose timing needs in consumer and industrial electronics.
Replacement Considerations
Direct substitutes include other 66.66 MHz LVCMOS oscillators in 4-SMD packages from Mercury Electronics, such as the 18QHTF21-66.000-OE, provided the frequency difference is acceptable. Cross-manufacturer replacements must match the 1.8V supply, LVCMOS output, and physical dimensions.
