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Product Detailed Parameters
- Description：12.7666 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：12.7666 MHz
- Function：Standby (Power Down)
- 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)：22mA
- 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 18QHTF21-12.7666-PD is a 12.7666 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The component features a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. It supports a Standby (Power Down) mode for energy efficiency. The device is designed for standard frequency control applications requiring precise timing signals.
Feature Summary
- LVCMOS output logic interface
- Supports Standby (Power Down) mode
- Compact 4-SMD No Lead package
Applications
- General purpose clock generation
- Digital signal processing timing
- Communication equipment synchronization
Procurement Notes
Verify the specific frequency suffix to ensure the correct oscillation rate matches system requirements. Confirm that the 1.8V supply voltage aligns with the target circuit design. Check package compatibility for the 4-SMD No Lead footprint during PCB layout. Ensure the manufacturer's datasheet specifications are reviewed for thermal and electrical limits before integration.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside a small form factor. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the power-down feature if system-level energy management is a priority. Verify that the 12.7666 MHz frequency meets the specific timing needs of the application.
Part Context
This part belongs to the Mercury Electronics XO series, which offers various frequencies and package sizes. The 18QHTF21 series specifically targets space-constrained designs with its 2.0x1.6mm footprint. Similar models in the lineup may differ in voltage, frequency, or package type, requiring careful comparison of datasheets for substitution or parallel selection.
Replacement Considerations
Direct substitutes must match the 12.7666 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Cross-reference with other manufacturers' 2.0x1.6mm oscillators ensuring identical pinout and electrical characteristics. Verify that any alternative part supports the same standby functionality and operating temperature range.
