4520, 744520 Dual 4-bit asynchronous binary counters with reset and both active high and active low clocks. +----------+ 1CLK |1 +--+ 16| VCC /1CLK |2 15| 2RST 1Q0 |3 14| 2Q3 1Q1 |4 13| 2Q2 1Q2 |5 4520 12| 2Q1 1Q3 |6 11| 2Q0 1RST |7 10| /2CLK GND |8 9| 2CLK +----------+ [This information is part of the GIICM]