name: HT27C512_DIPSOP32 function: OTP CMOS 64Kx8-Bit EPROM package: DIP/SOP28,28 manufacturer: Holtek +--()--+ A15 | 1 28| VCC A12 | 2 27| A14 A7 | 3 26| A13 A6 | 4 25| A8 A5 | 5 24| A9 A4 | 6 23| A11 A3 | 7 22| OEB/VPP A2 | 8 21| A10 A1 | 9 20| CEB A0 |10 19| DQ7 DQ0 |11 18| DQ6 DQ1 |12 17| DQ5 DQ2 |13 16| DQ4 VSS |14 15| DQ3 +------+ This pinout came from the Chipdir: http://www.chipdir.org/ name: HT27C512_PLCC32 function: OTP CMOS 64Kx8-Bit EPROM package: PLCC32,32 manufacturer: Holtek +--------+---------+---------+-------------+ | 1 - NC | 9 - A2 | 17 - NC | 25 - OEB/VPP| | 2 - A15| 10 - A1 | 18 - DQ3| 26 - NC | | 3 - A12| 11 - A0 | 19 - DQ4| 27 - A11 | | 4 - A7 | 12 - NC | 20 - DQ5| 28 - A9 | | 5 - A6 | 13 - DQ0| 21 - DQ6| 29 - A8 | | 6 - A5 | 14 - DQ1| 22 - DQ7| 30 - A13 | | 7 - A4 | 15 - DQ2| 23 - CEB| 31 - A14 | | 8 - A3 | 16 - VSS| 24 - A10| 32 - VCC | +--------+---------+---------+-------------+ This pinout came from the Chipdir: http://www.chipdir.org/