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Product Detailed Parameters
- Description：12.459 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：12.459 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)：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 18QHTF21-12.459-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.459 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package designed for surface mount applications.
Feature Summary
- Provides stable clock signals with LVCMOS output compatibility
- Features integrated enable/disable functionality for power efficiency
- Designed for surface mount assembly in space-constrained layouts
Applications
- Digital signal processing systems requiring precise timing
- Communication equipment utilizing standard clock interfaces
- Embedded systems with low-voltage power constraints
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint to prevent assembly issues during manufacturing.
Selection Notes
Select this component when a 12.459 MHz clock source is required with LVCMOS interface compatibility. Consider the 1.8V operating voltage and enable pin availability for power management strategies. Evaluate the 4-SMD package size against available board real estate and thermal dissipation needs for the target application environment.
Part Context
This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based timing solutions. The manufacturer has extensive experience in producing crystals, oscillators, and filters. This specific model represents a standard XO variant optimized for general-purpose digital timing applications.
Replacement Considerations
Compatible substitutes include other 12.459 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify equivalent frequency stability and current consumption ratings. Ensure the replacement part maintains the same enable/disable pin configuration and physical footprint for direct board integration.
