5-to-32 line decoder with 3 to 8 line decoder

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fm_com_28

Joined: 02 Feb 2006
Posts: 158
Helped: 5
Location: Fayoum, Egypt

03 Oct 2006 10:45 5 to 32 decoder

Dear,
I want to construct a 5-to-32 line decoder with four 3-ro-8 line decoders with enable and a 2-to-4 line decoder.

nikhilele

Joined: 11 Jan 2006
Posts: 543
Helped: 22
Location: Bangalore India

03 Oct 2006 12:14 5 32 decoder

you have 5 input lines and you need output lines

now let lines are
d0 lsb
d1
d2
d3
d4 msb

connect d3 and d4 to 2-to-4 line decoder
connect d0, d1, and d2 to all 3-to-8 line decoders.

Now connect output of 2-to-4 line decoder to enable pins of 3-to-8 line decoders such that the first output makes first 3-to-8 line decoders enable.

thats it 32 output of 3-to-8 line decoders are your required output

again try your self and if u need schematic just post in here.
don't forget to press help me button if this was helpful.

fm_com_28

Joined: 02 Feb 2006
Posts: 158
Helped: 5
Location: Fayoum, Egypt

03 Oct 2006 15:08 5 to 32 line decoder

Yes , I need the schematic

nikhilele

Joined: 11 Jan 2006
Posts: 543
Helped: 22
Location: Bangalore India

04 Oct 2006 8:35 5-32 decoder

here is the schematic

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marios2001

Joined: 12 Feb 2009
Posts: 1

12 Feb 2009 14:00 5-to-32 decoder

my friend if we don't put any inverters is it still right?

CMOS

Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA

12 Feb 2009 18:42 5*32 decoder

nikhilele wrote:

here is the schematic

nikhilele, your circuit will not work! ABC lines of bottom 3 ICs are not connected! and last IC has no connection at all !

Here is the corrected schematic. You can also use inverter (7404) instead of AND gate with last IC. In that case connect D3 to G1 and inverted D4 to G2A.

EDIT: Ohh I didn't notice this thread is almost 3 year old!! anyways Very Happy

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cerberus_14

Joined: 14 Mar 2009
Posts: 1

14 Mar 2009 16:00 1 of 32 decoder

Sir, how will I extend this to make a 10 to 1024 decoder? will using 4 to 16 decoders be feasible?

CMOS

Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA

15 Mar 2009 20:26 5-to-32 line decoder

cerberus_14 wrote:

Sir, how will I extend this to make a 10 to 1024 decoder? will using 4 to 16 decoders be feasible?

I would suggest use a CPLD or FPGA for it rather than discrete ICs

hyuugapatik

Joined: 14 Dec 2008
Posts: 4

22 Mar 2009 15:56 6-to-64 line decoder

hi cmos! how about a 6 to 64 decoder?? thanks!

CMOS

Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA

23 Mar 2009 16:23 5 bit decoder

hyuugapatik wrote:

hi cmos! how about a 6 to 64 decoder?? thanks!

Its doable. You'll need 16 of them. But I haven't seen any discrete 6 to 64 decoder IC!

bibha

Joined: 09 Jun 2009
Posts: 1

09 Jun 2009 7:18 2 to 4 decoder to 3 to 8 with enable

fm_com_28 wrote:

Dear,
I want to construct a 5-to-32 line decoder with four 3-ro-8 line decoders with enable and a 2-to-4 line decoder.

mtechvlsi

Joined: 07 Sep 2009
Posts: 8
Location: delhi

07 Sep 2009 11:39 5:32 decoder

pz help me in constructing a 5-32 bit decoder using NAND or NOR gate.

Plz help

CMOS

Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA

07 Sep 2009 23:41 6 to 64 line decoder

mtechvlsi wrote:

pz help me in constructing a 5-32 bit decoder using NAND or NOR gate.

Plz help

This is how you implement it. Quite easy, isn't it? Very Happy

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mtechvlsi

Joined: 07 Sep 2009
Posts: 8
Location: delhi

19 Sep 2009 14:55 line decoder

yeah thanks buddy, i was implementing it through using 2-4 and 3-8 decoders.
i will be needing ur help again if u cud help me in designin 5-32 bit decoder in NOR logic.

CMOS

Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA

19 Sep 2009 19:51 5-to-32 decoder mosfet

mtechvlsi wrote:

i was implementing it through using 2-4 and 3-8 decoders.

Thats what I have done.

Here is the implementation using NOR gates.

Click "Helped Me" button if you find the replies helpful.

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mtechvlsi

Joined: 07 Sep 2009
Posts: 8
Location: delhi

20 Sep 2009 18:25 32 line decoder

1st of all thank u, u r rite but i was deployin 4 3-8 decodern n 1 2-4 deocder.
i wanted to ask again if the ip lines 4m 3-8 decoder at the end of above box r to connected elsewhere also? same in 2nd box?

CMOS

Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA

20 Sep 2009 19:04 3 to 8 line decoder

No they are just the inputs. Not connected anywhere else. E is MSB, A is LSB.
Since its matrix connection, you only need one 3-8 and one 2-4 decoder.

Please do not use SMS/Text type language here (ip = input, 4m = from). Its hard to read it.

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mtechvlsi

Joined: 07 Sep 2009
Posts: 8
Location: delhi

29 Sep 2009 11:40 decoder5*32

My project is CMOS 6T SRAM Implementation in different technology for SNM ,DRV,RM & WM Analysis.

Frist i have to do READ & WRITE operation means i want to do calculate of Cell Ratio & PULL-UP Ratio. Then I want to do analysis of SNM ,DRV ,WM & RM .So please send me reponse as soon as possible that How will i do this project & also Circuit diagram.I am confused in input & Output of this circuit.plz response me.

mtechvlsi

Joined: 07 Sep 2009
Posts: 8
Location: delhi

01 Oct 2009 7:07 Tcam

can any one give me a simple circuit of tcam cell with its prechage ckt and sense amplifier as i need to stimulate one tcam cell.Its very urgent and necessary.Plz give response as soon as possible.