7431
Hex delay elements.
Typical delays are 27.5ns (1,6), 46.5ns (2,5), 6ns (3,4).
Improved output currents IoH=-1.2mA, IoL=24mA for gates 3 and 4.

    +----------+                 _            _____
 1A |1  +--+ 16| VCC        /1Y=1A        /4Y=4A*4B
/1Y |2       15| 6A
 2A |3       14| /6Y         2Y=2A         5Y=5A
 2Y |4       13| 5A             _____          _
 3A |5  7431 12| 5Y         /3Y=3A*3B     /6Y=6A
 3B |6       11| 4B
/3Y |7       10| 4A
GND |8        9| /4Y
    +----------+

[This information is part of the GIICM]