QTM325-26.000MBB-T

Overview

The QTM325-26.000MBB-T is a surface-mount CMOS oscillator manufactured by QST, operating at a nominal frequency of 26MHz. It utilizes a 3.3V supply voltage and features a standard CMOS output signal. The component is housed in a compact 4-SMD, no-lead package with dimensions of 3.2mm x 2.5mm and a maximum seated height of 1.10mm. It offers a frequency stability of ±50ppm over the operating temperature range of -40°C to +85°C. The device is RoHS3 compliant and REACH compliant, designed for reliable integration into space-constrained electronic circuits requiring precise timing signals.

Feature Summary

• Surface-mount CMOS technology for direct PCB integration
• Compact 3.2mm x 2.5mm footprint suitable for dense layouts
• Standard CMOS output signal compatibility
• RoHS3 and REACH regulatory compliance

Applications

• Digital clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Synchronization in communication interfaces
• Consumer electronics internal timing circuits

Procurement Notes

Verify the specific suffix 'BB' corresponds to the required ±50ppm stability and 3.3V operation when sourcing. Confirm that the 4-SMD no-lead package matches the target PCB land pattern. Ensure the selected distributor provides documentation confirming RoHS3 and REACH compliance status for the specific batch. Cross-reference the manufacturer part number to avoid confusion with similar frequencies or voltage variants within the QTM325 series.

Selection Notes

Select this component when a 26MHz CMOS clock source is required in a minimal footprint. The 3.3V supply requirement must align with the system power architecture. Consider the ±50ppm stability specification against the timing tolerance requirements of the connected digital logic. The operating temperature range of -40°C to +85°C supports general industrial and commercial applications without needing extended grade variants.

Part Context

This oscillator belongs to the QTM325 series from QST, which provides various frequency and stability options in a standardized SMD package. The series is designed to replace discrete crystal oscillator solutions with integrated alternatives. Similar parts in the series include different frequency codes such as 25.000 or 50.000, and varying stability suffixes like D or E, all sharing the same physical dimensions and interface characteristics.

Replacement Considerations

Direct substitutes may include other 26MHz 3.3V CMOS oscillators in 3.2x2.5mm packages from manufacturers such as TXC or Epson. Verify electrical parameters including supply voltage, output swing, and load capacitance before substitution. Physical pinout compatibility must be confirmed, as some competitors may use different pin assignments for power and ground.