7416640 Dual 8-bit 3-state noninverting bus transceiver. +----------+ +---------------+ 1DIR |1 +--+ 48| /1EN |/EN|DIR| A | B | 1B1 |2 47| 1A1 |---+---+---+---| 1B2 |3 46| 1A2 | 1 | X | Z | Z | GND |4 45| GND | 0 | 0 |/B | Z | 1B3 |5 44| 1A3 | 0 | 1 | Z |/A | 1B4 |6 43| 1A4 +---------------+ VCC |7 42| VCC 1B5 |8 41| 1A5 1B6 |9 40| 1A6 GND |10 39| GND 1B7 |11 38| 1A7 1B8 |12 7416 37| 1A8 2B1 |13 640 36| 2A1 2B2 |14 35| 2A2 GND |15 34| GND 2B3 |16 33| 2A3 2B4 |17 32| 2A4 VCC |18 31| VCC 2B5 |19 30| 2A5 2B6 |20 29| 2A6 GND |21 28| GND 2B7 |22 27| 2A7 2B8 |23 26| 2A8 2DIR |24 25| /2EN +----------+ [This information is part of the GIICM]