29-10-2014, 02:01 PM
Abstracts: The microcontroller based IC tester is implemented by using the 89s52 microcontroller board. The processing of the inputs and outputs is done by the controller. Controller is send the input and output data to PC. After the successful testing of the IC, the result is displayed on the PC. The basic function of the microcontroller based IC tester is to test a digital IC for correct logical functioning as described in the truth table and/or function table. It can test digital ICs having 14 pins. Since, software is designed any number of ICs can be tested within the constraint of the memory available. This model applies the necessary signals to the inputs of the IC, monitoring the outputs at each stage and comparing them with the outputs in the truth table. Any discrepancy in the functioning of the IC results in a fail indication, displays the faulty and good gates on the PC. The testing procedure is accomplished with the help of PC based software. At this stage we had completed to test the most common used digital IC's used in our laboratories, mainly belonging to the 74TTL series and successfully completed writing assembly code for 10 IC’s. This tests various types of IC's like OR, XOR, NAND, AND, NOT, NOR, XNOR GATES.