View idt74fct162501etpa datasheet:

( ) IDT74FCT162501ETPA 1/2 IL08 C-MOS 18-BIT REGISTER TRANSCEIVER —TOP VIEW— A to B INPUTS OUTPUT OEAB IN 1 GND 56 OEAB LEAB CLKAB Ax Bx LEAB IN 2 55 CLKAB IN 0 x x x HI-Z 1 1 x 0 0 A1 I/O 3 54 B1 I/O 1 1 x 1 1 4 GND GND 53 1 0 0 0 A2 I/O 5 52 B2 I/O 1 0 1 1 1 0 0 x B*1 A3 I/O 6 51 B3 I/O 1 0 1 x B*2 7 VDD VDD 50 B to A A4 I/O 8 49 B4 I/O INPUTS OUTPUT A5 I/O 9 48 B5 I/O LEBA CLKBA Ax Bx OEBA 0 x x x HI-Z A6 I/O 10 47 B6 I/O 1 1 x 0 0 11 GND GND 46 1 1 x 1 1 A7 I/O 12 45 B7 I/O 1 0 0 0 1 0 1 1 A8 I/O 13 44 B8 I/O 1 0 0 x B*1 A9 I/O 14 43 B9 I/O 1 0 1 x B*2 A10 I/O 15 42 B10 I/O *1 : OUTPUT LEVEL BEFORE THE INDICATED STEADY-STATE INPUT CONDITIONS WERE A11 I/O 16 41 B11 I/O ESTABLISHED. A12 I/O 17 40 B12 I/O