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Product Detailed Parameters
- Description：79.3505 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：79.3505 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)：26mA
- 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 18QHTF21-79.3505-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 79.3505 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.
Feature Summary
- Supports low-voltage operation at 1.8V
- Integrates standby and power-down functionality
- Utilizes LVCMOS output logic for digital interfacing
Applications
- General clock signal generation
- Digital circuit timing reference
- Embedded system synchronization
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to prevent assembly errors during manufacturing.
Selection Notes
Select this component when a precise 79.3505 MHz clock source is required for LVCMOS-compatible digital logic. Consider the 1.8V operating voltage constraint and the need for power management features. Evaluate the small form factor suitability for space-constrained printed circuit board layouts compared to larger oscillator packages.
Part Context
This model belongs to the Mercury Electronics XO (Standard) series, designed for general-purpose clocking applications. The product line emphasizes compact surface-mount solutions with integrated power control. The manufacturer has established expertise in quartz frequency control products since 1973, positioning this component within their standard SMD oscillator portfolio.
Replacement Considerations
Direct substitutes must match the 79.3505 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pin compatibility and thermal characteristics. Cross-reference with other Mercury Electronics models in the same series if availability is an issue.
