name: HT1330 function: 3-1/2 Digit Timer+Watch package: QFP48,48 manufacturer: Holtek +---------+----------+----------+----------+ | 1 - NC | 13 - NC | 25 - BC3 | 37 - COM2| | 2 - NC | 14 - S2 | 26 - AG3 | 38 - OSC1| | 3 - NC | 15 - NC | 27 - FE3 | 39 - OSC2| | 4 - T1 | 16 - S1 | 28 - BC2 | 40 - NC | | 5 - VSS| 17 - VEE | 29 - ADG2| 41 - NC | | 6 - VDD| 18 - CAP2| 30 - FE2 | 42 - NC | | 7 - NC | 19 - NC | 31 - COD3| 43 - NC | | 8 - OP | 20 - CAP1| 32 - NC | 44 - NC | | 9 - BZ | 21 - NC | 33 - BC1 | 45 - NC | | 10 - BZB| 22 - NC | 34 - AG1 | 46 - BUSY| | 11 - S3 | 23 - NC | 35 - FE1 | 47 - T2 | | 12 - NC | 24 - COM1| 36 - KD1 | 48 - NC | +---------+----------+----------+----------+ This pinout came from the Chipdir: http://www.chipdir.org/