name: HT82K68A_DIP40 function: Multimedia Keyboard Encoder package: DIP40,40 manufacturer: Holtek +--()--+ PB5(R5) | 1 40| PC6(R6) PB4(R4) | 2 39| PB7(R7) PA3(C3) | 3 38| PA4(C4) PA2(C2) | 4 37| PA5(C5) PA1(C1) | 5 36| PA6(C6) PA0(C0) | 6 35| PA7(C7) PB3(R3) | 7 34| OSC2 PB2(R2) | 8 33| OSC1 PB1(R1) | 9 32| VDD PB0(R0) |10 31| RESETB PD7(R15) |11 30| PE4(CAP) PD6(R14) |12 29| PD3(R11) PD5(R13) |13 28| PD2(R10) PD4((R12) |14 27| PD1(R9) VSS |15 26| PD0(R8) PE2(SCR) |16 25| PC7(R17) PE3(NUM) |17 24| PC6(R16) PC0(DATA) |18 23| PC5 PC1(CLK) |19 22| PC4 PC2 |20 21| PC3 +------+ This pinout came from the Chipdir: http://www.chipdir.org/ name: HT82K68A_DIP42 function: Multimedia Keyboard Encoder package: DIP42,42 manufacturer: Holtek +--()--+ PB5(R5) | 1 42| PC6(R6) PB4(R4) | 2 41| PB7(R7) PA3(C3) | 3 40| PA4(C4) PA2(C2) | 4 39| PA5(C5) PA1(C1) | 5 38| PA6(C6) PA0(C0) | 6 37| PA7(C7) PB3(R3) | 7 36| OSC2 PB2(R2) | 8 35| OSC1 PB1(R1) | 9 34| VDD PB0(R0) |10 33| RESETB PD7(R15) |11 32| PE4(CAP) PD6(R14) |12 31| PD3(R11) PD5(R13) |13 30| PD2(R10) PD4((R12) |14 29| PD1(R9) VSS |15 28| PD0(R8) PE2(SCR) |16 27| PC7(R17) PE3(NUM) |17 26| PC6(R16) PC0(DATA) |18 25| PC5 PC1(CLK) |19 24| PC4 PC2 |20 23| PC3 PE0 |21 22| PE1 +------+ This pinout came from the Chipdir: http://www.chipdir.org/