74657 8-bit 3-state noninverting bus transceiver with parity generator/checker. Enable and direction pins control output enables. +----------+ DIR |1 +--+ 24| /OE A1 |2 23| B1 A2 |3 22| B2 A3 |4 21| B3 A4 |5 20| B4 A5 |6 74 19| GND VCC |7 657 18| GND A6 |8 17| B5 A7 |9 16| B6 A8 |10 15| B7 O//E |11 14| B8 /ERROR |12 13| PAR +----------+ [This information is part of the GIICM]