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Product Detailed Parameters
- Description：49.48 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：49.48 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 18QHTF21-49.480-OE is a standard LVCMOS crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.48 MHz with a supply voltage of 1.8V. The device features an enable/disable function and is housed in a compact 4-SMD, No Lead package measuring 2.0 x 1.6 mm. It supports an operating temperature range suitable for general electronic applications.
Feature Summary
- Generates a precise 49.48 MHz clock signal using LVCMOS output logic
- Operates on a low 1.8V power supply for energy efficiency
- Includes an enable/disable control pin for power management
- Utilizes a small surface-mount package for space-constrained designs
Applications
- Digital signal processing systems requiring stable clock sources
- Communication equipment utilizing LVCMOS interfaces
- Embedded systems with limited power budgets
- Consumer electronics with tight PCB space requirements
Procurement Notes
Verify the specific load capacitance and frequency stability specifications against your circuit design requirements before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the enable/disable functionality is supported by your controlling logic. Check for any specific handling requirements associated with the no-lead SMD package during assembly.
Selection Notes
Select this component when a low-voltage, small-footprint clock source is required. The LVCMOS output is compatible with standard digital logic families. Consider the enable feature if dynamic power saving is necessary. Compare dimensions against available board space to ensure the 2.0x1.6mm package fits. Verify thermal performance within the specified operating temperature range.
Part Context
This part belongs to Mercury Electronics' line of surface-mount crystal oscillators. The '18' prefix typically indicates the 1.8V supply voltage, while 'QHTF21' denotes the series and package type. These components are designed for high-volume consumer and industrial electronics where size and power consumption are critical factors.
Replacement Considerations
Direct replacements must match the 49.48 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pin compatibility and electrical characteristics. Consult manufacturer cross-reference lists for verified substitutes.
