View sn74lvt16501dlr datasheet:

SN74LVT16501DLR (1/2) IL08D C-MOS 3-STATE 18-BIT UNIVERSAL BUS TRANSCEIVERS —TOP VIEW— 3 54 A1 B1 5 52 1 GND 56 A2 B2 6 51 2 55 A3 B3 8 49 3 54 A4 B4 9 48 4 GND GND 53 A5 B5 10 47 5 52 A6 B6 12 45 6 51 A7 B7 13 44 7 VDD VDD 50 A8 B8 14 43 8 49 A9 B9 15 42 9 48 A10 B10 16 41 10 47 A11 B11 17 40 11 GND GND 46 A12 B12 19 38 12 45 A13 B13 20 37 13 44 A14 B14 21 36 14 43 A15 B15 23 34 15 42 A16 B16 24 33 16 41 A17 B17 26 31 17 40 A18 B18 18 GND GND 39 1 19 38 OEAB 55 20 37 CLKAB 2 21 36 LEAB 22 VDD VDD 35 27 23 34 OEBA 30 24 33 CLKBA 28 25 GND GND 32 LEBA 26 31 27 30 28 GND 29 PIN PIN PIN PIN I/O SIGNAL I/O SIGNAL I/O SIGNAL I/O SIGNAL NO. N