QT325S-16.000MDHJ-T

Overview

The QST QT325S-16.000MDHJ-T is a miniature surface-mount quartz crystal resonator designed for high-frequency timing applications. It operates at a nominal frequency of 16 MHz with a fundamental parallel mode configuration. The device features a load capacitance of 18 pF and an equivalent series resistance of 60 Ohms. Frequency stability is specified at ±20 ppm within the -20°C to +70°C temperature range, with extended range stability of ±30 ppm from -40°C to +85°C. The component utilizes a 4-SMD, no-lead package with dimensions of 3.2 x 2.5 x 0.7 mm, suitable for automated assembly processes.

Feature Summary

• Miniature surface-mount design optimized for automated assembly and reflow soldering
• AT-cut quartz construction ensuring stable frequency performance across industrial temperature ranges
• RoHS compliant manufacturing process free from restricted substances such as lead and mercury

Applications

• Embedded communication systems requiring precise clock signals
• High-power motor control cabinets utilizing stable timing references
• Handheld consumer products with space-constrained PCB layouts
• General-purpose microcontroller clock sources in compact electronic devices

Procurement Notes

Verify the specific suffix code against official QST documentation to confirm temperature range and stability specifications. Ensure compatibility with standard reflow profiles for 4-SMD packages. Confirm RoHS compliance status through manufacturer certificates if required by regulatory standards. Check moisture sensitivity level ratings prior to storage and handling procedures.

Selection Notes

Select this component when a 16 MHz fundamental frequency is required with ±20 ppm stability over commercial temperatures. Consider the 18 pF load capacitance for oscillator circuit matching. Evaluate the 3.2 x 2.5 mm footprint against available board space. Compare alternative suffixes if wider operating temperatures or different stability tolerances are necessary for the specific application environment.

Part Context

This part belongs to the QST QT325S series of miniature SMD crystals. The series offers various frequency options and stability grades defined by alphanumeric suffixes. These components are engineered for portable electronics and industrial equipment where size and reliability are critical. The family supports both fundamental and overtone modes depending on the specific model variant selected.

Replacement Considerations

Direct substitutes include other QST variants within the QT325S series with compatible electrical parameters. Cross-manufacturer replacements must match the 16 MHz frequency, 18 pF load capacitance, and 3.2 x 2.5 mm package dimensions. Verify that alternative parts meet the same ±20 ppm stability requirement over the -20°C to +70°C range.