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MSP430F2619S-HT: can external 32KHz resonator and/or oscillator be used?

Part Number: MSP430F2619S-HT

Hi,

we are developing an application which needs accurate timing. For this we would like to use low frequency quartz crystals and/or oscillators.

The datasheet states:

"LFXT1 in 32-KHz mode is specified to function only between –55°C to 105°C. This module is know to fail above 110°C. For further info
contact TI support."

Our application has to operate at 150C temperature. 

Is it possible to use 32kHz quartz crystal at these temperatures at all? or would we have to supply clock from external source? 

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