QTM252J-50.000MBJ-T

Overview

The QTM252J-50.000MBJ-T is a standard CMOS quartz oscillator from QST, housed in a compact 4-SMD, No Lead package measuring 2.5mm x 2.0mm. It operates at a fixed frequency of 50 MHz with a supply voltage of 3.3V and features an Enable/Disable control function. The device offers a frequency stability of ±50ppm across the industrial temperature range of -40°C to +105°C. Designed for low electromagnetic interference (EMI) applications, it utilizes a ceramic resonator element. This component supports high-speed digital interfaces requiring precise timing signals within space-constrained environments.

Feature Summary

• Compact 2520 surface-mount footprint designed for space-constrained PCB layouts
• Integrated enable/disable functionality for power management control
• Low EMI output characteristics suitable for sensitive digital circuits
• Industrial-grade temperature rating for reliable operation in harsh environments

Applications

• High-speed data bus clocking for SATA and PCIe interfaces
• Wireless communication modules including WLAN and Bluetooth
• Consumer electronics such as IP cameras and gaming devices
• Industrial storage equipment reference clocks

Procurement Notes

Verify the specific suffix codes on the datasheet to confirm voltage levels, stability tolerances, and packaging configurations. Ensure the selected variant matches the required operating temperature range and supply voltage constraints of the target application circuit. Cross-reference manufacturer part numbers carefully as distributors may list equivalent parts from different manufacturers under similar naming conventions.

Selection Notes

Select this oscillator when a 50 MHz CMOS signal is required in a minimal footprint. Consider the ±50ppm stability specification against system jitter budgets. Evaluate the enable pin requirements for power sequencing strategies. Confirm compatibility with 3.3V logic levels and ensure the industrial temperature range meets environmental specifications.

Part Context

This model belongs to the QTM252 series of low-jitter CMOS oscillators. The series covers frequencies from 4 MHz to 125 MHz, targeting general-purpose timing needs in consumer and industrial electronics. Variants differ by frequency, voltage, and stability grades, sharing the same 2520 package and low-EMI design philosophy.

Replacement Considerations

Direct substitutes include other 2520 package CMOS oscillators from manufacturers like TXC Corporation offering identical 50 MHz frequency and 3.3V operation. Verify pinout compatibility and electrical parameters before substitution.