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Product Detailed Parameters
- Description：1.966 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：1.966 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 18QHTF21-1.966-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 1.966 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning with a supply voltage of 1.8V. It incorporates enable and disable control capabilities to manage power consumption during idle states. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.
Feature Summary
- LVCMOS output interface
- Enable/Disable control functionality
- 1.8V supply voltage operation
Applications
- Low-power digital circuit clocking
- Embedded system timing references
- Portable electronic devices
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V operating voltage aligns with the system power rail. Ensure the 4-SMD no-lead package dimensions match the PCB footprint layout. Cross-reference the part number suffix with official Mercury documentation to confirm the exact electrical specifications and availability status.
Selection Notes
Select this component when a precise 1.966 MHz reference signal is required for LVCMOS-compatible logic circuits. The enable/disable feature makes it suitable for battery-operated systems requiring power management. Consider the 1.8V supply constraint and ensure the application environment supports the specified operating conditions. Evaluate the physical size constraints of the 4-SMD package against the available board space.
Part Context
This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series typically offers various frequencies within the SMD form factor. Mercury has a long history in quartz crystal manufacturing, providing industry-standard components for timing applications across industrial and consumer electronics sectors.
Replacement Considerations
Consult official Mercury datasheets for direct pin-to-pin compatible alternatives within the same series. Verify that any substitute maintains the 1.966 MHz frequency, LVCMOS output type, and 1.8V supply requirement. Check for equivalent enable/disable functionality and package compatibility.
