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Product Detailed Parameters
- Description：7.9954 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：7.9954 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)：21mA
- 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 18QHTF21-7.9954-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 7.9954 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features an Enable/Disable control function to manage power states effectively. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports LVCMOS output signal compatibility
- Includes Enable/Disable control functionality
- Operates on a 1.8V power supply
- Utilizes a compact 4-SMD no-lead package
Applications
- General-purpose digital circuit timing
- Embedded system clock generation
- Consumer electronics timing references
- Industrial control board synchronization
Procurement Notes
Verify the exact part number suffix against official Mercury Electronics documentation to confirm specific operational modes such as Enable/Disable versus Standby functions. Ensure that the required operating voltage and output logic levels match the target circuit design specifications before procurement to avoid compatibility issues.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside precise frequency stability at 7.9954 MHz. The choice is appropriate for space-constrained designs due to the small 2.0x1.6 mm footprint. Consider the Enable/Disable feature if power management during inactive periods is a critical design requirement.
Part Context
This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequency options within the same physical package. The series provides standardized LVCMOS outputs for broad compatibility with digital interfaces. The specific model targets applications needing reliable timing sources in minimal form factors.
Replacement Considerations
Direct substitutes must match the 7.9954 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics with alternative manufacturers before integration.
