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Product Detailed Parameters
- Description：49.3933 MHz XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：49.3933 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)：23mA
- 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 18QHTF21-49.3933-OE is a standard LVCMOS crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.3933 MHz and requires a 1.8V supply voltage. The device features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications. This component provides precise timing signals suitable for digital circuits requiring stable clock sources with low profile dimensions.
Feature Summary
- Supports LVCMOS output logic levels for direct interface with digital loads
- Includes enable and disable functionality to manage power consumption
- Utilizes a leadless surface-mount package for automated assembly
Applications
- Digital signal processing systems requiring precise clock synchronization
- Communication equipment utilizing standard CMOS logic interfaces
- Embedded systems with limited board space constraints
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to prevent soldering defects during assembly.
Selection Notes
Select this component when a standard LVCMOS output is required alongside an enable pin for power control. Compare the operating temperature range and stability specifications against environmental conditions. Evaluate the physical size of the 4-SMD package against available board real estate relative to alternative oscillator packages.
Part Context
This oscillator belongs to the H21 series of SMD oscillators from Mercury Electronics. The company specializes in frequency control products including quartz crystals and various oscillator types. The 18QHTF21 series represents a line of surface-mount devices designed for modern electronics manufacturing processes requiring small form factors.
Replacement Considerations
Check for compatible parts within the same H21 series family or other 4-SMD LVCMOS oscillators with matching 1.8V operation. Verify equivalent frequency and pinout compatibility before substitution.
