I'm looking for microcontroller chip that is more long than wide. It has to have SPI and at least 5 GPIO pins. It could be fast and cheap. It will be my first project with raw microcontroller, so it could be more beginer friendly. I don't know where to look for it, so I'm patiently waiting for all of your suggestions.
Update:
The width must be smaller than 15mm / as small as possible. IO pins must be 3.3V. I'm looking for bare chip to put on pcb. Thanks for all corrections.
ATMEGA328P in a DIP package would satisfy your requirements and you can use the Arduino IDE with it too. It requires the minimum of external components too.
What are your soldering skills like? Are you looking for a bare chip or perhaps a small board with all the components already fitted, tested and ready to go?
BUT I suspect you have additional requirements / constraints that you have yet to share...
Any other requirements other than more long than wide?
Is there a specific size constraint?
Does your IO require 5v or 3.3v?
You have the Arduino Nano and its many flavors, you have the Arduino Micro and Pro Micro.
There are also the ESP32 modules.
You can also switch teams and go with a Raspberry Pi Pico which can use MicroPython as well as the Arduino IDE.
I'm looking for bare chip.
It has to be 3.3V and has to be smaller than 15mm width.
We are all patiently awaiting the rest of your unstated requirements.
Have a look at the recent arduino (and non) boards. Rarely the chip is more than 15mm.
You can get AVR microcontroller chips in surface mount or through-hole DIP package. They meet the simple requirement and they can run 8-10 MHz at 3.3V, maybe get 12 MHz. A surface mount ATmega328P is 7mm x 7mm.
Try microchip dot com for more info.
You can get much less simple, far more powerful microcontrollers for not much more cost.
