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Обычное и индустриальное исполнение.
The LTC3351E is guaranteed to meet specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The LTC3351I is guaranteed over the –40°C to 125°C operating junction
Точно, спасибо, там не додумался посмотреть