I have recently entered into PCB designing area and after reading about sharp rising edges can generate voltage on other components, I was thinking that, in the following image, will the routing I2C signal lines below crystal (16 MHz) would disturb the crystal's output signal to that extent that my microcontroller would not oscillate at all or oscillate but would glitch.
Rise time for both SCL and SDA is ~300 ns and the clock (for 10 to 400 pF loaded line).
Microcontroller is ATMega328p and I2C is connected to PCF8574A. This board is 2 layer board only.
There is also SCK line, but it's speed will also not exceeding 100 kHz.