The is a member of the Series CMOS range, and contains four independent NAND gates, each with two inputs. The pinout diagram, given on the. NAND Gate, CD, 2 Input, mA, 3 V to 18 V, DIP with direct implementation of the NAND function and supplement the existing family of CMOS gates. Texas Instruments CDBE CD – CMOS Quad 2-Input NAND Gate (Pack of 5): : Industrial & Scientific.
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The diodes at the input protection of Cmos gates clamps the input voltage to 0. Aug 6, 6.
A Beginner’s Guide To The Cmos
I have created the following image attached NAND gate oscillator using 2 gates. If only one input is used and the spare input is connected to the positive supply voltage then the c,os will be more symmetrical. NAND gate c4d011 frequency calculation Posted by ukiceman in forum: I read about input protection http: Aug 5, 1. Hi Audioguru, I changed the circuit as per your suggestion.
Aug 6, Aug 6, 7. I got rid of the switch that shorts the output to ground, was using it as a reset. Aug 6, 8.
CD Quad 2-Input NAND Gate CMOS IC Free IC Base for: : Electronics
Your simulation sofware is also wrong when it shows the very slow switching ramps 0. Your oscillator has both inputs of the gates shorted together. A CD will not blow up unless you connect the power supply backwards.
Your simulation software is wrong because it shows the input going 4V higher than the positive supply and 4V below ground.
May 11, Do xmos already have an account?
Practical Electronics/IC/4011
Cms 20, 15, The 1M resistor between the oscillator and counter is not required and might stop the circuit from working because it will combine with stray capacitance between wires and cause the square-wave from the oscillator to be a triangle-wave at the clock input of the counter. Your Yenka sim software doesn’t know if it is coming or going.
What is wrong in this circuit? Aug 7, I don’t know why your oscillator has a switch at its output that shorts the output to ground. You might get better results with a different arrangement of the RC components – http: Your SIM program doesn’t know that the input of Cmos gates have input protection diodes that limit the input voltage to plus and minus 0.
The datasheets of Cmos gates shows that they switch their output in only 50ns 0. The wave is not exactly square in shape. Your name or email address: Discussion in ‘ General Electronics Chat ‘ started by smartyramAug 5, The resistor is not needed if the ICs use the same power supply voltage.
Dec 20, 10, 1, Why do you use a very high value resistor 1M feeding the oscillator to the counter’s clock input? Would appreciate any feedback from you?
The absolute max supply for a high speed 74HC is 7V and they recommed a max of 6V. Feb 17, 4, 1, Aug 6, 5. The circuit supply voltage is 12v. Aug 6, 9. Yes, my password is: Hi beenthere, I have made a new circuit. Maybe it will be simpler to use Aug 5, 3.
No, create an account now. You get oscillator and counter in one. Aug 5, 17 2. Aug 6, 4.
Aug 5, 2.