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Product Detailed Parameters
- Description：73.8888 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：73.8888 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)：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 18QHTF21-73.8888-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 73.8888 MHz and utilizes LVCMOS output logic. The component requires a 1.8V supply voltage and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications.
Feature Summary
- Supports active low or high enable/disable functionality for power management
- Provides stable LVCMOS clock signals for digital circuit synchronization
- Designed for low-profile surface-mount integration
Applications
- General purpose timing reference for embedded systems
- Clock generation for microcontroller units
- Synchronization source for data communication interfaces
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the PCB footprint matches the 4-SMD No Lead package dimensions provided in the official datasheet to prevent assembly issues.
Selection Notes
Select this model when a precise 73.8888 MHz clock signal is required with low voltage operation. Consider the enable pin utility if power conservation during idle states is necessary. Evaluate the small form factor against available board space constraints compared to larger through-hole alternatives.
Part Context
This component belongs to the Mercury Electronics XO series, which specializes in quartz-based timing solutions. The manufacturer has produced frequency control products since 1973, focusing on crystals, oscillators, and filters. This specific part represents a standard output variant within their portfolio of surface-mount timing devices.
Replacement Considerations
Direct substitutes must match the 73.8888 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pin compatibility and electrical characteristics before swapping. Cross-reference with other manufacturers offering identical frequency and package constraints.
