need hepl to solve the problem

[anbudanarunm]

Hai i have to design a input selection circuit by using a matrix keypad. So i have used MM74C922 as Keypad Encoder. For testing i have assembled it in breadboard. for to verify the functionality and check the output i have used LED's at the output section. But There is no indication for the key pressing. here with this i have attached the schematics. Can anyone look in and help to figure out the problem.

 

[btbass]

You have to pull pin 13, output enable low to get an output.
The output pins can not source a lot of current, might not turn on the leds unless they are low current leds.

 

[Rajppd]

even after pull pin 13 to low,you find that the LEDs are not working you may further see if your bread-board is working properly (continuity test). Sometimes, the contacts will not be proper.
As a next level, think of using transistor driver circuit for the LEDs also.

 

[anbudanarunm]

Thanks for you reply. After including a not gate b/w pin12 and 13 now am getting the LED o/p.