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Product Detailed Parameters
- Description：121.76 MHz XO 1.8V 2.0X1.6 MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：121.76 MHz
- Function：Standby (Power Down)
- 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 18QHTF21-121.760-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 121.76 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby mode to reduce power consumption during idle periods
- Utilizes a lead-free SMD package for automated assembly integration
Applications
- Digital signal processing systems requiring precise clock synchronization
- Communication equipment utilizing high-frequency data transmission
- Embedded control units needing stable timing references
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 power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent soldering defects during assembly.
Selection Notes
Select this component when a low-voltage, surface-mount oscillator with standby capability is required. Consider the operating temperature range and stability specifications relative to the environmental conditions of the end application. Evaluate the need for LVCMOS outputs versus other logic families to ensure signal integrity within the receiving circuitry.
Part Context
This model belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The series offers various frequencies and packaging options designed for modern electronic devices. Mercury Electronics has extensive experience in manufacturing precision timing components since 1973.
Replacement Considerations
Check for direct substitutes within the same series offering different frequencies but identical package and electrical characteristics. Verify compatibility with existing board layouts if swapping between variants. Ensure any replacement maintains the LVCMOS output type and 1.8V supply requirement.
