QTM252-26.000MBA-T

Overview

The QTM252-26.000MBA-T is a CMOS quartz oscillator manufactured by QST Corporation, operating at a nominal frequency of 26 MHz. It utilizes a 4-SMD surface-mount package with dimensions of 2.5 mm x 2.0 mm and a seated height of 0.79 mm. The device requires a supply voltage of 3.3 V and exhibits a frequency stability of ±25 ppm over the temperature range of -10°C to +70°C. This component provides a stable clock signal for digital circuits in compact electronic applications.

Feature Summary

• Integrates CMOS output driver for direct logic interfacing
• Compact 2.5mm x 2.0mm SMD ceramic package design
• Operates on standard 3.3V power supply rails

Applications

• Bluetooth module clock sources
• GPS receiver timing references
• Microcontroller system clocks

Procurement Notes

Verify that the target application environment remains within the specified -10°C to +70°C operational range to ensure the ±25 ppm frequency stability specification is met. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions of 2.5 mm length by 2.0 mm width. Ensure the circuit design supports the required 3.3V supply voltage level for proper oscillator activation and signal integrity.

Selection Notes

Select this component when a 26 MHz clock source is required for space-constrained designs utilizing 3.3V logic families. It serves as a suitable alternative to discrete crystal resonators by providing a ready-made square wave output. Engineers should consider the ±25 ppm stability limit against their system's jitter tolerance requirements before finalizing the bill of materials.

Part Context

This part belongs to the QTM252 series of active crystal oscillators from QST Corporation. The series offers various frequency options within the same physical footprint, allowing for design flexibility. The 26 MHz variant specifically targets communication interfaces such as Bluetooth Low Energy (BLE) and Wi-Fi subsystems where precise timing is critical for data synchronization.

Replacement Considerations

Compatible substitutes include other 26 MHz CMOS oscillators in 2520 packages, such as the QTM252-26.000METY-T or equivalent parts from manufacturers like TXC. Verify pinout compatibility and electrical specifications before swapping components.