(http://4.bp.blogspot.com/-okETcardlUw/Tiom-ltH3WI/AAAAAAAAAcU/KCFCWxJbysU/s1600/IC+AND+7408.jpg)
What do you call something like this?
Does anyone know where I can found something like this? I want to know how they create the addition IC.
4081/7408 Quad 2 input AND gate
that one is a TTL family quad 2-input AND gate
7408
74LS08
74HC08
74HCT08
74S08, etc
the CMOS family 4081 has a different pinout,
as well as a very different set of specs - operating voltage, speed, and power, most notably
for each gate, both inputs have to be "high" or "1" in order for the output to be high
It's four pacmen, drunk and (with eyes closed) sipping vodka from very long, bent straws.
Two are hunched over, as they can no longer stand up straight.
Two are so high, they appear to be crawling on the ceiling. :green2
the keyword for manual of that is "datasheet", put in some search engine "ttl datasheet" or other technology.
Search about "half adder", an add circuit of one bit.
Your figure show the boolean logic AND, in a total of 4 AND's, that have 2 input and 1 output each.
Generally, you create a table, divide this table in 2 parts, one for input, other for output. Fill all input values possible, and based in input, create your output.
To you "add" 2 inputs, you need 2 outputs, the value of sum and the "carry".
After you have created one bit adder, call that piece like block, put in paralell other blocks, and you can have a 8 bits adder.
edit after:
you can get some free IC if you send email to "Texas Instruments".
Quote from: mineiro on May 06, 2012, 02:29:38 AM
the keyword for manual of that is "datasheet", put in some search engine "ttl datasheet" or other technology.
Search about "half adder", an add circuit of one bit.
Your figure show the boolean logic AND, in a total of 4 AND's, that have 2 input and 1 output each.
Generally, you create a table, divide this table in 2 parts, one for input, other for output. Fill all input values possible, and based in input, create your output.
To you "add" 2 inputs, you need 2 outputs, the value of sum and the "carry".
After you have created one bit adder, call that piece like block, put in paralell other blocks, and you can have a 8 bits adder.
edit after:
you can get some free IC if you send email to "Texas Instruments".
Thanks :U This is what Im looking for.
Nice see that have helped.
You can search about a "full adder" too.
I'm posting again to say to you about a nice challenge. How can you create/represent "subtraction" of numbers only using addition?
Computers don't do subtraction, only addition. This is why people talk about 2 complement and 1 complement.
Quote from: mineiro on May 06, 2012, 05:00:08 AM
Nice see that have helped.
You can search about a "full adder" too.
I'm posting again to say to you about a nice challenge. How can you create/represent "subtraction" of numbers only using addition?
Computers don't do subtraction, only addition. This is why people talk about 2 complement and 1 complement.
Well, if Im not mistaken then, it used a negative sign in front of the bits then.
Here we go.. This should get you excited !!
http://www.google.co.za/url?q=http://en.wikipedia.org/wiki/VHDL&sa=U&ei=ZpWpT6DBGpOYhQfTz9zHAg&ved=0CC4QFjAG&usg=AFQjCNH9j2Q4buZ2vHKtmWmqL1pH43XtGg
:green2