Semiconductors Connection Diagrams B67 SN7489N SN74L89 AN . 64-bit RAM SELECT INPUTS A : les MEM WRITE 1 0 0 Lr PL2 PL Fle Ps Ps | SENSE DATA oe DATA O/P i7P e/e, SENSE GND B68 SN7490N SN74L90N Decade counter B69 =SN7491AN SNT74L91N 8-bit shift register SENSE SENSE DATA O/P DATA O/P up 1p B70 SN7492N Divide by 12 counter B71 = SN7493N 4-bit binary counter B72 SN7494N 4-bit shift register PS PS PS PS PS 2A 2 28 2C GND 2D CLEAR O/P 16 15 p14 1) 13 jal 12 Lal 11 bl 10 ba 9 | | cL O CLR. e 1 2 3 4 5 6 7 8 PS. PS PS PS Vo, PS SERIAL CLK 1 WB I >) 1 INPUT MANUFACTURERS CURRENT LIST PRICES ARE ALWAYS CHARGED 1164