Part number : 7490
Functions : Decade and Binary Counters
Manufacturer : Fairchild Semiconductor
The DM7490A monolithic counter
To use the maximum count length (decade or four-bit binary), the B input is connected to the QAoutput. The input count pulses are applied to input A and the outputs are as described in the appropriate truth table. A symmetrical divide-by-ten count can be obtained from the counters by connecting the QDoutput to the A input and applying the input count to the B input which gives a divide-by-ten square wave at output QA.
Other data sheets within the file : 7490, DM7490A, DM7490AN