Part Number: 7490
Function: Decade and Binary Counter
Package: DIP 14 Pin Type
Manufacturer: Fairchild Semiconductor
Pinouts:
Description:
The 7490 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.
Logic Diagram
Features:
1. Typical power dissipation : 90A, 145 mW
2. Count frequency : 42 MHz
Other data sheets are available within the file: 74HC90, DM7490A, DM7490AN