Decoding 2 bit to 4 ( 74 seriest)
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Posts: 46,084
But if you prefer 74 series there are the
74238 that is exactly you want.
ACJacques
A.C.Jacques wrote:
>
> There are many:
> CD4028 is straightforward.
> CD4514 can do this using q8 q9 q10 q11 as outputs and setting A3 High.
> The CD4051 8ch analog multiplex is OK (must use pull up /or down
> resistors ? ).
>
> ACJacques
>
> RiffRaff82@a... wrote:
> >
> > Does anyone know of an IC that EXACTLY matches this truth table:
> >
> > IN OUT
> > | a b | 1 2 3 4 |
> > |
|
|
> > | 0 0 | 1 0 0 0 |
> > | 0 1 | 0 1 0 0 |
> > | 1 0 | 0 0 1 0 |
> > | 1 1 | 0 0 0 1 |
> >
> > The 74x195 & 74x155 have the outputs reversed from this, and I would have to
> > use a set of inverters, and i REALLY needed to keep the # of devices to a
> > minimum. So, if anyone knows of a device...
> >
> > Thanks in advance,
> > Edward Kindler
74238 that is exactly you want.
ACJacques
A.C.Jacques wrote:
>
> There are many:
> CD4028 is straightforward.
> CD4514 can do this using q8 q9 q10 q11 as outputs and setting A3 High.
> The CD4051 8ch analog multiplex is OK (must use pull up /or down
> resistors ? ).
>
> ACJacques
>
> RiffRaff82@a... wrote:
> >
> > Does anyone know of an IC that EXACTLY matches this truth table:
> >
> > IN OUT
> > | a b | 1 2 3 4 |
> > |
|
|
> > | 0 0 | 1 0 0 0 |
> > | 0 1 | 0 1 0 0 |
> > | 1 0 | 0 0 1 0 |
> > | 1 1 | 0 0 0 1 |
> >
> > The 74x195 & 74x155 have the outputs reversed from this, and I would have to
> > use a set of inverters, and i REALLY needed to keep the # of devices to a
> > minimum. So, if anyone knows of a device...
> >
> > Thanks in advance,
> > Edward Kindler