I'm testing a SN7476 chip on a breadboard. I wired the chip in an attempt to toggle the Q output voltage from high to low, back and forth. The J, K, PRE, CLR pins of the SN7476 chip are all set to 5v high. The CLK input is connected to the "3" pin output of a 555 chip running on the same breadboard and sharing the same power source. The pattern of the oscillation is about 0.8 seconds high/0.08 seconds low.
Here's the problem. The Q output on the chip only shifts in voltage from about 0.6v to about 0.8v. I was expecting the output of Q to be something like 3v or better, then close to 0v. There are actually 2 flips flops on this SN7476 chip. I tried both flip flops and they both act the same way.
Any ideas as to what might be causing the voltage output issue? The SN7476 are not using any resistors to control current/voltage inputs or outputs. I have an oscilloscope and can see the voltage levels, but am not sure what else to try.
Here's the problem. The Q output on the chip only shifts in voltage from about 0.6v to about 0.8v. I was expecting the output of Q to be something like 3v or better, then close to 0v. There are actually 2 flips flops on this SN7476 chip. I tried both flip flops and they both act the same way.
Any ideas as to what might be causing the voltage output issue? The SN7476 are not using any resistors to control current/voltage inputs or outputs. I have an oscilloscope and can see the voltage levels, but am not sure what else to try.