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Product Detailed Parameters
- Description：121.65 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：121.65 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 18QHTF21-121.650-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 121.65 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.00mm x 1.60mm.
Feature Summary
- Integrates LVCMOS output interface for digital signal compatibility
- Includes hardware enable/disable pin for active power control
- Utilizes surface-mount SMD packaging for automated assembly
Applications
- High-speed data communication interfaces
- Digital signal processing clock sources
- Embedded system timing references
Procurement Notes
Verify the specific suffix 'OE' confirms the presence of the enable/disable functionality distinct from standard variants. Confirm the 1.8V supply requirement matches the target circuit design. Ensure the 4-SMD footprint aligns with the PCB layout specifications to avoid soldering defects during reflow processes.
Selection Notes
Select this component when a precise 121.65 MHz reference is required alongside low-voltage operation. The enable feature makes it suitable for battery-powered or power-sensitive applications. Compare against other Mercury models in the QHTF series to ensure the specific frequency and package size meet the mechanical constraints of the final assembly.
Part Context
This part belongs to the Mercury QHTF series of high-frequency crystal oscillators. The series typically offers various frequencies and supply voltages. The '18' prefix likely indicates the 1.8V supply variant, while 'QHTF' denotes the specific package and performance class within the manufacturer's portfolio.
Replacement Considerations
Direct substitutes must match the 121.65 MHz frequency, 1.8V supply, and LVCMOS output. Verify that any alternative part includes the enable/disable pin configuration. Check if the replacement maintains the same 2.0x1.6mm SMD footprint for direct board compatibility.
