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Product Detailed Parameters
- Description：122.167958 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：122.167958 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 18QHTF21-122.167958-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 122.167958 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning at 1.8V. It features an enable/disable control pin for power management flexibility. The component is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly.
Feature Summary
- LVCMOS output interface for digital compatibility
- Integrated enable/disable functionality for power control
- Compact 4-SMD no-lead surface mount package
Applications
- Digital signal processing systems
- Communication equipment clocking
- Embedded system timing references
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Request the official datasheet from Mercury Electronics for precise electrical characteristics and reliability data to ensure compliance with your application standards.
Selection Notes
Select this oscillator when a precise 122.167958 MHz reference is required in space-constrained designs. The LVCMOS output simplifies interfacing with standard digital logic without additional level shifting. The enable pin allows for dynamic power saving in battery-operated devices. Consider the 1.8V operating voltage to ensure compatibility with modern low-power microcontrollers and FPGAs.
Part Context
This part belongs to the H21 series of SMD oscillators from Mercury Electronics. The series is characterized by small form factors and low power consumption. Mercury Electronics is a specialized manufacturer of frequency control products, including quartz crystals and oscillators, with a long history in the industry. This specific model represents a standard XO variant within their portfolio.
Replacement Considerations
Direct substitutes may include other 122.167958 MHz LVCMOS oscillators in 4-SMD packages from different manufacturers, provided pinouts and electrical specifications match. Verify equivalent frequency stability and phase noise requirements. Cross-reference with Mercury Electronics' own H21 series variants if available.
