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Product Detailed Parameters
- Description：8.126984 MHz XO 1.8V 2.0X1.6 OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：8.126984 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)：21mA
- 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 18QHTF21-8.126984-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 8.126984 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features an Enable/Disable control function for power management. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes Enable/Disable functionality for active power control
- Utilizes a small form factor 4-SMD No Lead package to minimize PCB footprint
Applications
- Embedded systems requiring precise clock timing
- Portable electronic devices utilizing low-voltage power supplies
- Communication modules needing standard frequency references
Procurement Notes
Verify the specific suffix OE against official Mercury Electronics documentation to confirm the Enable/Disable feature and 1.8V operation. Ensure the 2.0x1.6mm package dimensions match the target PCB layout. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the LVCMOS output voltage levels are compatible with the receiving circuitry.
Selection Notes
Select this component when a low-profile oscillator with enable control is required for 1.8V systems. The 2.0x1.6mm size is suitable for space-constrained designs. Verify that the 8.126984 MHz frequency meets the system timing requirements. Consider the LVCMOS output compatibility with downstream logic families before finalizing the design.
Part Context
This oscillator belongs to the Mercury Electronics XO series, which provides frequency control solutions. The brand has a history of manufacturing quartz crystals and oscillators. The 18QHTF21 series typically offers various frequencies and package options. This specific model focuses on miniaturization and power efficiency through its small SMD package and low voltage operation.
Replacement Considerations
The 18QHTF21-8.126984-PD is a related variant from the same manufacturer but features Standby (Power Down) functionality instead of Enable/Disable. Verify if the control method difference impacts the system design. Other models in the 18QHTF21 series may share the same package but differ in frequency or voltage.
