name: PCF2100C function: LCD driver package: DIP28,28 manufacturer: Philips +--()--+ clb | 1 28| dlen Vdd | 2 27| data osc | 3 26| bp1 Vss | 4 25| bp2 s20 | 5 24| s1 s19 | 6 23| s2 s18 | 7 22| s3 s17 | 8 21| s4 s16 | 9 20| s5 s15 |10 19| s6 s14 |11 18| s7 s13 |12 17| s8 s12 |13 16| s9 s11 |14 15| s10 +------+ This pinout came from the Chipdir: http://www.chipdir.org/