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Product Detailed Parameters
- Description：2.5X2.0 LOW EMI CMOS QUARTZ OSCI
- Series：QTM252E
- Mfr：QST
- Package：Tape & Reel (TR)
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：40 MHz
- Function：Enable/Disable
- Output：CMOS (Low EMI)
- Voltage - Supply：3.3V
- Frequency Stability：±50ppm
- Absolute Pull Range (APR)：-
- Operating Temperature：-40°C ~ 125°C
- Spread Spectrum Bandwidth：-
- Current - Supply (Max)：10mA
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.098" L x 0.079" W (2.50mm x 2.00mm)
- Height - Seated (Max)：0.035" (0.90mm)
- Supplier Device Package：-
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Overview
The QTM252E-40.000MBM-T is a low EMI CMOS quartz oscillator manufactured by QST, designed for precise clock signal generation. It operates at a nominal frequency of 40 MHz with a frequency stability of ±50ppm. The device requires a 3.3V supply voltage and supports an enable/disable function. It features a surface mount package in a 4-SMD, no lead configuration with dimensions of 2.5x2.0 mm. The component is rated for an operating temperature range of -40°C to 125°C.
Feature Summary
- Low electromagnetic interference CMOS output
- Integrated quartz crystal base resonator
- Enable/Disable control functionality
Applications
- Precision clock signal generation
- Embedded systems requiring stable timing
- Consumer electronics with space constraints
Procurement Notes
Verify the specific part number suffix against official QST documentation to confirm exact specifications. Ensure compatibility with 3.3V logic levels and check for RoHS compliance status in the latest datasheet. Confirm that the 4-SMD package footprint matches the target PCB design requirements before procurement.
Selection Notes
Select this component when low EMI performance is critical for signal integrity in compact designs. The wide operating temperature range makes it suitable for industrial or automotive environments. Consider the ±50ppm stability requirement relative to system timing needs. The small 2.5x2.0mm footprint is ideal for high-density board layouts.
Part Context
This oscillator belongs to the QTM252E series from QST, which focuses on low-profile, low-EMI solutions. The series utilizes quartz crystals for high stability compared to MEMS alternatives. Similar models in the family include different frequency variants like the 24MHz and 27MHz versions, sharing the same package and electrical characteristics.
Replacement Considerations
Direct substitutes within the QTM252E series include other frequency variants such as QTM252E-24.000MBM-T or QTM252E-27.000MBM-T if frequency adjustment is permissible. Cross-brand replacements require matching the 4-SMD package, 3.3V supply, and low EMI CMOS output type.
