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Product Detailed Parameters
- Description：49.090902 M XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：49.090902 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 18QHTF21-49.090902-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.090902 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, functioning with a supply voltage of 1.8V. It features an Enable/Disable control function to manage power states efficiently. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Enable/Disable pin control for power management
- Compact 4-SMD no-lead surface mount package
Applications
- Digital signal processing circuits
- Communication equipment timing references
- Embedded system clock generation
Procurement Notes
Verify the specific suffix OE against the manufacturer's datasheet to confirm the Enable/Disable functionality and ensure it matches the design requirements. Confirm the 1.8V supply voltage compatibility with the target system. Check the 4-SMD package dimensions for PCB footprint alignment. Ensure the operating temperature range meets the environmental specifications of the final application.
Selection Notes
Select this component when a precise 49.090902 MHz clock source is required with low power consumption. The 1.8V operation makes it suitable for modern low-voltage digital systems. The Enable/Disable feature allows for dynamic power saving during idle periods. Consider the small form factor for space-constrained designs requiring surface-mount technology integration.
Part Context
This part belongs to the Mercury Electronics XO series, which provides stable frequency sources for electronic systems. Mercury Electronic Ind. Co., Ltd. is a Taiwan-based supplier specializing in quartz crystals and oscillators. The company has been manufacturing frequency control products since 1973, establishing itself as a pioneer in the industry. This specific model represents their standard oscillator offerings.
Replacement Considerations
The 18QHTF21-49.090902-PD is a related variant from the same manufacturer but features Standby (Power Down) functionality instead of Enable/Disable. Verify if the control logic difference impacts the circuit design before substitution. Other frequencies in the 18QHTF series may share similar packages but require frequency verification.
