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Product Detailed Parameters
- Description：122.2 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：122.2 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 18QHTF21-122.200-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 122.2 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an active-low enable/disable control pin for power management flexibility. The component is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.
Feature Summary
- Compact 2.0x1.6 mm SMD footprint
- LVCMOS output compatibility
- Active-low enable/disable functionality
Applications
- Portable consumer electronics
- Communication modules
- Embedded systems clocking
Procurement Notes
Verify the specific suffix 'OE' against the manufacturer's current datasheet to confirm the enable pin polarity and output drive strength. Ensure the operating temperature range meets the application requirements, as industrial variants may differ from commercial grades. Cross-reference the package outline drawing with the PCB footprint library to guarantee mechanical compatibility during assembly.
Selection Notes
Select this component when a 122.2 MHz reference signal is required in a minimal footprint design. The 1.8V supply voltage makes it suitable for modern low-power digital circuits. Consider the enable feature if dynamic power saving is necessary. Verify that the load capacitance requirements of the host system match the oscillator's specifications to ensure frequency accuracy.
Part Context
This part belongs to the 18QHTF21 series of ultra-small crystal oscillators from Mercury Electronics. The series is characterized by its small 2.0x1.6 mm package size and low power consumption. It is designed to replace larger through-hole or standard SMD oscillators in high-density PCB layouts, offering a balance between performance and physical size constraints.
Replacement Considerations
Direct replacements must match the 122.2 MHz frequency, 1.8V supply, and 2.0x1.6 mm package. Check for equivalent LVCMOS outputs and compatible enable logic levels. Verify that the replacement part has identical pinout assignments to avoid PCB redesign.
