View sm6103s datasheet:

SM6103S (1/2) IL00 ********** C-MOS 8-BIT A/D CONVERTOR �TOP VIEW� 6 VDD V IN 1 20 WR/RDY (+5V) 2 DB0 1 3 VIN DB1 DB0 OUT 2 NC 19 4 DB2 11 5 VREF(�) DB3 DB1 OUT 3 18 OFL OUT 14 DB4 12 15 VREF(+) DB5 DB2 OUT 4 17 DB7 OUT 16 DB6 17 DB7 DB3 OUT 5 16 DB6 OUT 9 INT WR/RDY IN 6 15 DB5 OUT 18 OFL MODE IN 7 14 DB4 OUT MODE CS RD RD IN 8 13 CS IN 7 13 8 INT IN 9 12 VREF(+) IN 10 GND 11 VREF(�) IN CS ; CHIP SELECT INPUT DB0 - DB7 ; DIGITAL DATA OUTPUTS INT ; INTERRUPT OUTPUT MODE ; MODE SELECT INPUT (WR-RD MODE/RD MODE) OFL ; OVERFLOW OUTPUT RD ; READ INPUT VIN ; ANALOG VOLTAGE INPUT VREF (+) ; TOP REFERENCE VOLTAGE INPUT VREF (�) ; BOTTOM REFERENCE VOLTAGE INPUT WR/RDY ; WR-RD MODE WR INPUT RD MODE RDY INPUT SM6103S (2/2) TOPPER