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Product Detailed Parameters
- Description：3.2x2.5 XO 3.3V 25ppm
- Series：QTM325
- Mfr：QST
- Package：Tape & Reel (TR)
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：50 MHz
- Function：Enable/Disable
- Output：CMOS
- Voltage - Supply：3.3V
- Frequency Stability：±25ppm
- Absolute Pull Range (APR)：-
- Operating Temperature：-40°C ~ 85°C
- Spread Spectrum Bandwidth：-
- Current - Supply (Max)：10mA
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.126" L x 0.098" W (3.20mm x 2.50mm)
- Height - Seated (Max)：0.043" (1.10mm)
- Supplier Device Package：4-VDFN (3.2x2.5)
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Overview
The QTM325-50.000MBD-T is a surface-mount quartz crystal oscillator manufactured by QST. It operates at a nominal frequency of 50 MHz with a frequency stability of ±25 ppm. The device utilizes CMOS output signals and requires a nominal supply voltage of 3.3 V. It features an enable/disable control function for power management. The component is housed in a compact 4-SMD, No Lead package with dimensions of 3.2 mm x 2.5 mm and a maximum height of 1.0 mm. It supports an operating temperature range from -40°C to +85°C.
Feature Summary
- CMOS output signal compatibility
- Enable/disable control functionality
- Compact 3.2mm x 2.5mm surface-mount package
Applications
- General-purpose digital clock generation
- Embedded system timing references
- Communication interface synchronization
Procurement Notes
Verify the specific suffix 'BD' against official QST documentation to confirm the exact pinout configuration and enable logic levels. Ensure the selected variant matches the required 3.3V supply voltage and CMOS output swing specifications for the target circuit design. Cross-reference the package outline drawing to confirm mechanical fit within the assembly constraints.
Selection Notes
Select this component when a precise 50 MHz reference is required with low power consumption capabilities enabled by the control pin. Consider the ±25 ppm stability requirement relative to the system's jitter tolerance. Evaluate the thermal performance within the specified -40°C to +85°C range to ensure reliability under operational conditions.
Part Context
This part belongs to the QTM325 series of standard oscillators from QST. The series offers various frequencies and packages, providing flexibility for different size and performance needs. The QTM325-50.000MBD-T specifically addresses applications requiring a stable 50 MHz clock source in a small footprint.
Replacement Considerations
Direct substitutes include other QTM325 variants with matching 50 MHz frequency and CMOS outputs, such as QTM325-50.000MBE-T or QTM325-50.000MCE-T, provided their specific electrical characteristics and pin configurations are compatible with the existing design.
