At 11:21 PM 12/2/2007, you wrote:
i was making the sdr for the masses circuit. Unfortuately i couldnt
get the IC pi3b3253. However i got another ic named 74hc4052. The
problem that i am now having is that although both the ic's are
mux/demuxers with almost the same pins there are two pins that are
different in both the ics
the pi3b3253 has 2 enables(one for high and one for low)
the 74hc4052 doesnt have this
the 74hc4052 has a Vee pin while the pi3b3253 doesnot have this pin.
will i still be able to use this ic as an equivalent.
please look at the link which provides the picture, it will make the
situation very clear.
<http://img509.imageshack.us/my.php?image=67751722pt1.png>http://img509.imageshack.us/my.php?image=67751722pt1.png
please do reply. please take your time. i would be very greatful.
yours
adnan yusuf
pi3b3253 74hc4052
1 6 Output enable active low
2 9 Addressing bit S1
3 11 Data in 3 of 1st Mux
4 15 Data in 2 of 1st Mux
5 14 Data in 1 of 1st Mux
6 12 Data in 0 of 1st Mux
7 13 Output of 1st Mux
8 8 Ground
9 3 Output of 2nd Mux
10 1 Data in 0 of 2nd Mux
11 5 Data in 1 od 2nd Mux
12 2 Data in 2 of 2nd Mux
13 4 Data in 3 of 2nd Mux
14 10 Addressing bit S0
15 not available does the same function as Output enable on pin 6
16 16 Vcc, power for IC
I can't get to the drawing you put up since my work Internet access
is blocking that site because of questionable business use.
The above pin-outs are a one for one translation of the pin
functions, the only discrepancy is that the 3253 has two output
enables, and the 4052 has only one, in any case I belive in the
original schematic it showed both output enables tied together so it
should work just fine connecting to the one enable.
Cecil
KD5NWA
www.softrockradio.org www.qrpradio.com
"Blessed are the cracked, for they shall let in the light."
