ASCII DIP Pinout Cheatsheet

TL:DR; this page is for the moments when a plain-text pinout is faster than opening a datasheet PDF.

Sometimes you do not need a polished schematic. Sometimes you just need a plain-text pinout you can drop into a terminal, notes file, README, or repair log without breaking stride.

Reference sheet

Ascii art pinouts for various DIP chips

Terminal-friendly pinouts for the moments where a plain-text diagram is faster than opening a datasheet. These are quick reference blocks, not substitutes for the original pin tables.

ASCII Pinout_ATmega8.txt

ATmega8

                       +---\/---+
         (RESET)  PC6  |1     28|  PC5  (ADC5 / SCL)
           (RXD)  PD0  |2     27|  PC4  (ADC4 / SDA)
           (TXD)  PD1  |3     26|  PC3  (ADC3)
          (INT0)  PD2  |4     25|  PC2  (ADC2)
          (INT1)  PD3  |5     24|  PC1  (ADC1)
      (XCK / T0)  PD4  |6     23|  PC0  (ADC0)
                  VCC  |7     22|  GND
                  GND  |8     21|  AREF
 (XTAL1 / TOSC1)  PB6  |9     20|  AVCC
 (XTAL2 / TOSC2)  PB7  |10    19|  PB5  (SCK)
            (T1)  PD5  |11    18|  PB4  (MISO)
          (AIN0)  PD6  |12    17|  PB3  (MOSI / OC2)
          (AIN1)  PD7  |13    16|  PB2  (SS / OC1B)
          (ICP1)  PB0  |14    15|  PB1  (OC1A)
                       +--------+

ASCII Pinout_ATTiny13.txt

ATTiny13

                      +---\/---+
                 PB5  |1*     8|  VCC
                 PB3  |2      7|  PB2
                 PB4  |3      6|  PB1
                 GND  |4      5|  PB0
                      +--------+

Where this works well

Terminal windows, README files, commit messages, quick bench notes, and those moments where you only need orientation and signal names, not a whole drawing package.

What makes it useful

The notch is visible, the numbering stays obvious, and the text survives copy-paste almost anywhere. That makes it good for quick reference in places where an image would be clumsy.

Bench use

The plain-text format is most helpful when you are moving quickly:

confirming pin 1 orientation before wiring
annotating breadboard or perfboard notes
posting help requests without drawing a full schematic
documenting MCU pins in a repo or repair log
checking signal names before applying power to something fragile

The limitation

ASCII pinouts are great for orientation and quick reference. They are not a replacement for a proper schematic once a project stops being simple.

Good rule: if the “quick note” now needs multiple rails, buses, pull-ups, or anything more complicated than basic orientation, it is time to graduate to a real diagram.