QT325G-16.000MEEJ-T

Overview

The QT325G-16.000MEEJ-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precise frequency generation in electronic circuits. It operates at a fundamental frequency of 16.000 MHz with a frequency tolerance of ±10 ppm within the temperature range of -30°C to +85°C. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 60 Ohms maximum. It utilizes a compact 4-SMD, No Lead package with dimensions of 3.2 mm x 2.5 mm x 0.8 mm, suitable for automated assembly processes.

Feature Summary

• Provides stable frequency output with tight ±10 ppm tolerance across extended industrial temperature ranges
• Utilizes a low-profile 4-SMD no-lead package design for efficient surface-mount integration
• Engineered for high reliability with specified ESR limits ensuring consistent circuit performance

Applications

• Microcontroller clock sources requiring precise timing synchronization
• Communication modules needing stable carrier frequencies
• Industrial control systems operating in variable thermal environments

Procurement Notes

Verify the specific suffix J indicates the required ±10 ppm tolerance and -30°C to +85°C operating range against your schematic requirements. Confirm that the 12 pF load capacitance matches your oscillator circuit design. Ensure the 4-SMD footprint aligns with your PCB layout constraints. Request manufacturer datasheets to validate electrical characteristics prior to final procurement decisions.

Selection Notes

Select this component when a 16 MHz reference signal is required with strict stability needs beyond standard commercial grades. The ±10 ppm tolerance makes it suitable for applications sensitive to frequency drift. Consider the 12 pF load capacitance compatibility with your MCU or oscillator IC inputs. The no-lead SMD format supports high-volume manufacturing workflows while maintaining small board space utilization.

Part Context

This part belongs to QST's QT325G series of thin-film bulk acoustic resonator crystals. The series offers various frequency options and tolerance levels defined by alphanumeric suffixes. The MEEJ designation specifically identifies the 16 MHz variant with enhanced temperature stability compared to basic commercial grade alternatives, fitting into broader timing solution portfolios.

Replacement Considerations

Direct substitutes include other 16 MHz crystals with identical 12 pF load capacitance and compatible 3.2x2.5mm footprints. Verify that alternative parts meet the same ±10 ppm tolerance over the -30°C to +85°C range. Cross-reference ESR specifications to ensure circuit oscillation startup conditions remain satisfied without modification.