Circuit Diagram
General Characteristics of CMOS IC CD4511
- Supply: 3 to 15V, small fluctuations are tolerated.
- Inputs have very high impedance (resistance). All unused inputs MUST be connected to the supply (either +Vs or 0V), this applies even if that part of the IC is not being used in the circuit!
- Outputs can sink and source only about 1mA if you wish to maintain the correct output voltage to drive CMOS inputs. If there is no need to drive any inputs the maximum current is about 5mA with a 6V supply, or 10mA with a 9V supply (just enough to light an LED). To switch larger currents you can connect a transistor.
- Fan-out: one output can drive up to 50 inputs.
- Gate propagation time: typically 30ns for a signal to travel through a gate with a 9V supply, it takes a longer time at lower supply voltages.
- Frequency: up to 1MHz, above that the 74 series is a better choice.
- Power consumption (of the IC itself) is very low, a few µW. It is much greater at high frequencies, a few mW at 1MHz for example.
7 Segment Display
Truthtable
D C B A OUTPUT
0 0 0 0 0
0 0 0 1 1
0 0 1 0 2
0 0 1 1 3
0 1 0 0 4
0 1 0 1 5
0 1 1 0 6
0 1 1 1 7
1 0 0 0 8
1 0 0 1 9
1 0 1 0 a
1 0 1 1 b
1 1 0 0 c
1 1 0 1 d
1 1 1 0 e
1 1 1 1 f
