PIC16C57

                _________    _________
              _|         \__/         |_
     ->T0CKI |_|1                   28|_| /MCLR-VPP
              _|                      |_
      ->VDD  |_|2                   27|_| OSC1/CLKIN <-
              _|                      |_
         N/C |_|3     PIC16C57      26|_| OSC2/CLKOUT ->
              _|                      |_
  -> VSS/GND |_|4                   25|_| RC7 <->
              _|                      |_
         N/C |_|5                   24|_| RC6 <->
              _|                      |_
    <-> RA0  |_|6                   23|_| RC5 <->
              _|                      |_
    <-> RA1  |_|7                   22|_| RC4 <->
              _|                      |_
    <-> RA2  |_|8                   21|_| RC3 <->
              _|                      |_
    <-> RA3  |_|9                   20|_| RC2 <->
              _|                      |_
    <-> RB0  |_|10                  19|_| RC1 <->
              _|                      |_
    <-> RB1  |_|11                  18|_| RC0 <->
              _|                      |_
    <-> RB2  |_|12                  17|_| RC7 <->
              _|                      |_
    <-> RB3  |_|13                  16|_| RB6 <->
              _|                      |_
    <-> RB4  |_|14                  15|_| RB5 <->
               |______________________|

Datasheet

File:PIC16C5X.pdf