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Product Detailed Parameters
- Description：122.767857 M XO 1.8V 2.0X1.6 OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：122.767857 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)：28mA
- 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 18QHTF21-122.767857-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 122.767857 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Integrates enable and disable functionality for power management
- Utilizes a leadless SMD package for space-constrained designs
Applications
- Digital signal processing systems
- Communication equipment clocking
- Embedded system timing references
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the PCB layout accommodates the 4-SMD no-lead footprint dimensions accurately to prevent soldering defects during assembly.
Selection Notes
Select this component when a precise 122.767857 MHz reference is required with low-voltage operation. Consider the LVCMOS output swing compatibility with downstream logic levels. Evaluate the thermal performance within the intended operating temperature range to ensure long-term frequency stability under varying environmental conditions.
Part Context
This part belongs to the Mercury Electronics standard XO series, characterized by leadless SMD packaging. The model number indicates a specific frequency variant within the 18QHTF21 family, which typically offers high stability and reliability for industrial and commercial electronic applications requiring accurate clock generation.
Replacement Considerations
Direct substitutes must match the 122.767857 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical parameters such as phase noise and jitter if available from alternative manufacturers.
