Logic Diagram Of Ic 7490

How to use decade counter ic.

Logic diagram of ic 7490. 7490 ic pinout diagram integrated circuits elektropage the electronic source. If you want to display the number on a 7 segment display you need a seven segment display driver ic. 74ls90 7490 logic ic decade counters. Ic 7490 datasheet pdf decade and binary counters 7490 datasheet 7490 pdf pinout data circuit ic manual substitute parts schematic equivalent.

The below circuit diagram is for bcd decade counter by giving high and low logic to the clka pin ic start counts from zero to 8 at every high logic. This is ripple counter so beware that glitches may occur in any logic gate systems connected to their outputs due to the slight delay before the later. It is an asynchronous decade counter ic. Ic 7490 is a decade counter ic which can generate output code in bcd.

The mod of the ic 7490 is set by changing the reset pins r1 r2 r3 r4. Brief about 7490 ic. Sign up for price alert. The 7490 is a decade counter meaning it is able to count from 0 to 9 cyclically and that is its natural mode.

On the 7490 pins 6 and 7 connect to an internal and gate for. Here you will find ic 7490 pin diagram ic 7490 truth table ic 7490 internal circuit and applications. That is qa qb qc and qd are 4 bits in a binary number and these pins cycle through 0 to 9 like this. 5 2 fast and ls ttl data sn54 74ls90 sn54 74ls92 sn54 74ls93 logic diagram ms1 ms2 mr1 mr2 cp0 cp1 q0 q1 q2 q3 mr1 cp0 cp1 q0 q1 q2 q3 mr2 ls90 mr1 cp0 cp1.

Nc no connection a pin that is not used. Let s look at the 7490 briefly to see how it works. If the pins r3 r4 are high then the count on qa qb qc and qd is 1001. 74ls90 7490 logic ic decade counters.

If any one of r1 r2 is at high or r3 r4 are at ground the counter will reset all the outputs qa qb qc and qd to 0.