name: AD7821KN function: 8 Bit High Speed A-D Converter package: 20 pin mini-DIP,20 manufacturer: Analog Devices added-by: Martin Pritchard +--()--+ Vin | 1 20| Vdd DB0 | 2 19| Vss DB1 | 3 18| /OFL DB2 | 4 17| DB7 DB3 | 5 16| DB6 RDY /WR | 6 15| DB5 MODE | 7 14| DB4 /RD | 8 13| /CS /INT | 9 12| Vref (+) GND |10 11| Vref (-) +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/