name:         PCF8568
function:     LCD row driver
package:      DIP28,28
manufacturer: Philips

     +--()--+
 sda | 1  28| r0
 scl | 2  27| r1
sync | 3  26| r2
 clk | 4  25| r3
 Vss | 5  24| r4
 sa0 | 6  23| r5
 ext | 7  22| r6
 osc | 8  21| r7
 Vdd | 9  20| r8
 vo3 |10  19| r9
 vo4 |11  18| r10
Vlcd |12  17| r11
 r15 |13  16| r12
 r14 |14  15| r13
     +------+


This pinout came from the Chipdir:
http://www.chipdir.org/