CD datasheet, CD pdf, CD data sheet, datasheet, data sheet, pdf, Intersil, CMOS OR Gate. CD – Dual 4-In OR Gate. Item #CD $ $ The CD is supplied in a 14 lead outline package: Features a Thru-Hole Device. Data Sheet. Texas Instruments cd Logic Gates are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments cd Logic.

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All the other buttons that will reset the circuit must be connected to the ‘ERR’ input. At 2 September Cdd4072 has the same operation as the previous one, but it is not recommended to be used with a touch keypad!

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The circuit is designed to operate at any voltage between 5 and 15 volts. But now its working perfect I have not test it but it could work. The digit ‘4’ is more than once in the code and that cannot happen. So if the keypad had 10 keys and the code was ” the keys 1,3,4,6,7,8 and 0 must be connected to the ERR input. Sometimes i should use more than i should, like now that i have separated on the top-right corner for the IC power supplies.


CD4072 Dual 4-input OR Gate

When you leave the 4th digit, everything returns to LOW. The only thing that needs to be changed is the relay. Each ‘correct’ key press will SET a flip-flop.

Anyways thanx for ur time and help Each one must go to one and only key!

Thanx in advance At 25 August At 22 August If you will use normal push-buttons for the keypad, i suggest you use the following circuit instead. At 29 December5: At 15 January So, No, it would not work. Did i solve your problem? This circuit has a 4-digit security code that is hardware selectable. Also, if the code must be entered in vatasheet correct order. Thanx At 15 January At 28 Datashwet7: Please continue this conversation there because it may become a long thread: At 3 October At 19 June At 27 December It will require adtasheet spend a lot of time to design and test the PCB.


At 1 June0: To be more secure, the keypad should be on another remote PCB. At 18 June Now you press the digit 4 first.

CD datasheet,datasheets manu Page:1==CMOS OR Gate==[INTERSIL] pdf datenblatt – –

The one with the or with the diodes? You are talking about the first or the second circuit?

May be an auto-reset feature should be added? Look the video and read the section “The keypad”. From the truth table, R-0 and S-0 makes no change to the outputs.

At 29 December6: Is this design able to datashset to accommodate a seven digit code? But it would require more cables to draw on the circuit and this makes me sick sometimes. The 4 D inputs are the ‘correct’ buttons.

This is exactly the same circuit as the previous one, with the only difference on the reset.