name: 73K221AL function: Modem package: PLCC,28 manufacturer: TDK added-by: Neil Harrison comment: V22, V21: 1200, 300 bps modem +---------+---------+-----------+-----------+ | 1 - CLK | 8 - AD4| 15 - VDD | 22 - RXD | | 2 - XTL1| 9 - AD5| 16 - TXA | 23 - RXCLK| | 3 - XTL2| 10 - AD6| 17 - /INT | 24 - ISET | | 4 - AD0 | 11 - AD7| 18 - TXCLK| 25 - RESET| | 5 - AD1 | 12 - ALE| 19 - EXCLK| 26 - VREF | | 6 - AD2 | 13 - /WR| 20 - /CS | 27 - RXA | | 7 - AD3 | 14 - /RD| 21 - TXD | 28 - GND | +---------+---------+-----------+-----------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/