Solved
international oscillator accuracy over temperature range
Microcontroller may be; STM32L0 or L4
Required; 5% worst case over -5 to 50'C
The microcontrollers are quoted 1% accurate at 25'C but I can not find how accurate they over the ICs temperature range. I want to avoid trimming or fitting a crystal.
The application does not require a lot of processing and includes battery power and charging so an Fxxx variant or other may be suitable if temperature range is specified?

