QT532S-30.000MEEQ-T

Overview

The QT532S-30.000MEEQ-T is a fundamental mode quartz crystal resonator manufactured by QST, operating at a nominal frequency of 30 MHz. It features a frequency stability and tolerance of ±10 ppm and a load capacitance of 10 pF. The equivalent series resistance (ESR) is specified as 40 Ohms. The component utilizes a seam seal construction within a 2-SMD, no lead package measuring 5.0 mm in length, 3.2 mm in width, and a maximum seated height of 0.9 mm. It supports surface mount installation and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Fundamental oscillation mode with seam seal construction for environmental protection
• High frequency stability of ±10 ppm across the extended industrial temperature range
• Compact 2-SMD no-lead footprint designed for automated surface mount assembly

Applications

• Clock signal generation for microprocessors and microcontrollers
• Frequency reference sources for communication modules
• Timing circuits in consumer electronic devices

Procurement Notes

Verify that the replacement component matches the original 10 pF load capacitance and 40 Ohm ESR specifications to ensure circuit stability. Confirm the physical dimensions align with the PCB footprint, specifically the 5.0 x 3.2 mm outline and 0.9 mm height limit. Ensure the supplier provides documentation confirming the ±10 ppm frequency tolerance and operation within the -40°C to +85°C range required for the application environment.

Selection Notes

Select this component when a precise 30 MHz reference is required with tight ±10 ppm stability constraints. The 10 pF load capacitance must match the oscillator circuit design to achieve the specified frequency accuracy. Consider the 40 Ohm ESR value for drive level sensitivity and power consumption requirements. The 2-SMD package is suitable for high-volume surface mount production lines requiring compact form factors.

Part Context

This part belongs to the QT532S series from QST, which offers various frequencies and stability options in a standardized 5.0x3.2mm SMD package. The 'E' suffix indicates the ±10 ppm stability grade, while 'EQ' denotes the specific packaging and termination style. This series is designed to provide reliable timing solutions for applications demanding higher precision than standard commercial grade crystals.

Replacement Considerations

Public confirmed substitute part numbers include 445I23D12M00000 and 445I33D12M00000 from CTS-Frequency Controls, which are listed as parameter equivalent alternatives.