Are there small packages with OSC-In/Out pins? - STMicroelectronics Community

Been browsing through the Lxxx and Gxxx STM32 MCUs and found that all variants I checked on hat the OSC-In and OSC-Out pins available only with 48 pin and higher packages.

Is this a general rule, or are there MCUs with small package (preferably TSSOP) that can accommodate an external crystal?

4 REPLIES 4

Hello @b.a.,

To use a crystal resonator, you which would require OSC_In and OSC_OUT pad to maintain the resonator effect.

For that, it is necessary to refer to the MCU datasheet and verify the availability OSC_IN and OSC_OUT pins in the package.

For example, you can use the STM32F070xB/6 MCU with small package (TSSOP20) to accommodate an external crystal resonator.

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Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

or stm32F030F4P - tssop20 ; i use this .

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Hi KDJEM.1,

I know that this information is available in the datasheets, but I find it quite tedious to look at every single one. There seem to be hundreds of different MCUs available.

I was hoping for an easier way to identify the specific models that can accommodate an external crystal in small packages.

Like the filters in the product selector.

3x2 mm oscillators are getting quite cheap. And try to use internal RC if no real exact clock is needed.