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 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.
A CD will not blow up unless you connect the power supply backwards. Aug 5, 3. Cmoz simulation sofware is also wrong when it shows the very slow switching ramps 0.
100pcs/lot CD4011BE CD4011 DIP-14 Quad 2 Input CMOS NAND Gate
You might get better results with a different arrangement of the RC components – http: Aug 5, 1. Dec 20, 10, 1, The resistor is not needed if the ICs use the same power supply voltage. Your Yenka sim software doesn’t know if it is coming or going. Aug 5, 2. Solar-Powered Graphene Skin Reproduces Sense of Touch Researchers at the University of Glasgow have created a solar-powered graphene skin that can simulate the sense of touch.
No, create an account now. Your oscillator nxnd both inputs of the gates shorted together.
Apr 20, 15, The wave is not exactly square in shape. Aug 6, 6. Feb 17, 4, 1, You May Cmoss Like: Your name or email address: I don’t know why your oscillator has a switch at its output that shorts the output to ground. You get oscillator and counter in one. May 11, Aug 6, 9. I have created the following image attached NAND gate oscillator using 2 gates. Yes, my password is: Your simulation software is wrong because it shows the input going 4V higher than the positive supply and 4V below ground.
The absolute max supply for a high speed 74HC is 7V and they recommed a max of 6V.
If only one input is used and the spare input is connected to the positive supply voltage then the output will be more symmetrical. Aug 6, 5. Aug 6, Hi Audioguru, I changed the circuit as per your suggestion. Why do you use a very high value resistor 1M feeding the oscillator to the counter’s clock input? Maybe it will be simpler to use The datasheets of Cmos gates shows that they switch their output in only 50ns 0.
I read about input protection http: The circuit supply voltage is 12v. Would appreciate any feedback from you? Aug 6, 7. 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. Quote of the day. Aug 7, Do you already have an account? Discussion in ‘ General Electronics Chat ‘ started by smartyramAug 5, Aug 6, 4. Aug 5, 17 2.
CD QUAD 2-INPUT NAND GATE – Velleman – Wholesaler and developer of electronics
Hi beenthere, I have made a new circuit. NAND gate oscillator frequency calculation Posted by ukiceman in forum: Aug 6, 8. The diodes at the input protection of Cmos gates clamps the input voltage to 0. I got rid of the switch that shorts the output to ground, was using it as a reset. Is it good cd401 to run a binary counter? What is wrong in this circuit?