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Product Detailed Parameters
- Description：84.70625 MHz XO 1.8V 2.0X1.6 OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：84.70625 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 18QHTF21-84.70625-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 84.70625 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.00mm x 1.60mm.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Integrated enable/disable control functionality
- Compact surface-mount design suitable for space-constrained applications
Applications
- General clock signal generation
- Digital system timing references
- Embedded electronics requiring precise frequency sources
Procurement Notes
Verify the specific operating temperature range and load capacitance requirements against the target application environment before procurement. Confirm that the 1.8V supply voltage aligns with the system power architecture. Ensure the 4-SMD no-lead package footprint matches the PCB layout to prevent soldering defects during assembly.
Selection Notes
Select this component when a stable 84.70625 MHz reference is required with low-voltage operation. Consider the LVCMOS output swing limits relative to downstream logic levels. Evaluate the thermal performance within the intended enclosure to ensure reliable operation across the specified temperature range without exceeding maximum ratings.
Part Context
This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltages, including 2.5V variants like the 25QHTF21. The 'OE' suffix typically denotes specific packaging or ordering configurations. This model provides a cost-effective solution for standard clocking needs compared to higher-performance TCXO or OCXO alternatives.
Replacement Considerations
Direct substitutes include other 84.70625 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD footprints. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications. Cross-reference with similar Mercury models like the 18QHTF21-85.120-OE if frequency tolerance allows.
