7416474 Dual 9-bit 3-state noninverting registered transceiver. +----------+ /1OB |1 +--+ 56| /1OA 1CAB |2 55| 1CBA 1A1 |3 54| 1B1 GND |4 53| GND 1A2 |5 52| 1B2 1A3 |6 51| 1B3 VCC |7 50| VCC 1A4 |8 49| 1B4 1A5 |9 48| 1B5 1A6 |10 47| 1B6 GND |11 46| GND 1A7 |12 45| 1B7 1A8 |13 44| 1B8 1A9 |14 7416 43| 1B9 2A1 |15 474 42| 2B1 2A2 |16 41| 2B2 2A3 |17 40| 2B3 GND |18 39| GND 2A4 |19 38| 2B4 2A5 |20 37| 2B5 2A6 |21 36| 2B6 VCC |22 35| VCC 2A7 |23 34| 2B7 2A8 |24 33| 2B8 GND |25 32| GND 2A9 |26 31| 2B9 2CAB |27 30| 2CBA /2OB |28 29| /2OA +----------+ [This information is part of the GIICM]