1 This Activity Sheet Will Study The Ttl And Logic Gate The Number Is 74aaaa08 Check To Ensure This Number Is On The 1 (44.22 KiB) Viewed 27 times
1. This Activity Sheet will study the TTL AND Logic gate. The number is 74AAAA08, check to ensure this number is on the DIP chip you install on your bread board. 2. As the wire is moved from Ground to +5 Volts and back, the input will float. This may confuse the logic gate and the Red LED may flicker, light dimly, or light normally. For the purposes of data collection, ONLY record LED status when both of the wires are connected (not floating). 3. The 3302 resistor may be replaced with one of greater value. 1. Construct the circuit in Figure below on your breadboard. 2. Measure and record the actual resistor reading VCC 5.0V VCC 5.0V Pin 1 Pin 14 UTA Pin 3 41 S2 7408J Pin_7 R1 3300 Pin 2 LED1 3. Use the switches (wires) to test the operation of the gate. Using the LED as an indicator, fill in the table below for each possible condition (starting with 00, that is ground both Pin 1 and Pin 2). Using the DMM, measure the value of the voltage at the output of the logic gate for each condition. m Pin le (Pin 3) Voltage Pin 2e 0 Pin 3 02 le 0 le ܒ10 ܒ1
4. If the bit sequence below was applied to input 1 and to input 2, what would you expect the output bit sequence to be? Pin le oe Pin 2e le Pin 3e le ܢܢ1 00 1:3 le le oe le le le 0e le je le oe le le 5. A TTL system does not appear to be working correctly. A technician takes the readings from a 7408 chip and provides the data in the table below. Is this chip working correctly? Pin le Pin 2e le le le le 0 ܢܢ1 le ܢܢ1 Pin 3ele 02 le le le le le 02 12 le le 02 le 12 02 le LLLLLLLL le le 02 le le
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