Trying to identify a chip...

D

Dave

Guest
Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for this
chip shows pin 5 as VDD, and I am wondering, isn't VDD usually the same as
GND? (Don't see any pins labled as GND, although there is VSS ,which I am
thinking is +5 volts). And the chip mentioned above is a PLL, btw. Any
help is appreciated...

Thanks,

Dave
 
Dave Inscribed thus:

Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for
this chip shows pin 5 as VDD, and I am wondering, isn't VDD usually
the same as
GND? (Don't see any pins labled as GND, although there is VSS ,which
I am
thinking is +5 volts). And the chip mentioned above is a PLL, btw.
Any help is appreciated...

Thanks,

Dave
Click to expand...
<http://encyclobeamia.solarbotics.net/articles/vxx.html>

--
Best Regards:
Baron.
 
"baron" <baron.nospam@linuxmaniac.nospam.net> wrote in message
news:hduff2$e4s$1@news.eternal-september.org...
Dave Inscribed thus:

Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for
this chip shows pin 5 as VDD, and I am wondering, isn't VDD usually
the same as
GND? (Don't see any pins labled as GND, although there is VSS ,which
I am
thinking is +5 volts). And the chip mentioned above is a PLL, btw.
Any help is appreciated...

Thanks,

Dave

http://encyclobeamia.solarbotics.net/articles/vxx.html

--
Best Regards:
Baron.
Click to expand...
Why *thank you* Baron. Much appreciated...

Dave
 
"Dave" <db5151@hotmail.com> wrote in message
news:SOCdnYS2oISsI5_WnZ2dnUVZ_uydnZ2d@posted.internetamerica...
Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for this
chip shows pin 5 as VDD, and I am wondering, isn't VDD usually the same as
GND? (Don't see any pins labled as GND, although there is VSS ,which I am
thinking is +5 volts). And the chip mentioned above is a PLL, btw. Any
help is appreciated...

Thanks,

Dave
Click to expand...
I believe you have it backwards, Vdd is + Voltage and Vss is GND. According
to the data sheet, Vdd can be between +3Volts and +9Volts.
 
"Bob Eld" <nsmontassoc@yahoo.com> wrote in message
news:hdug68$moj$1@news.eternal-september.org...
"Dave" <db5151@hotmail.com> wrote in message
news:SOCdnYS2oISsI5_WnZ2dnUVZ_uydnZ2d@posted.internetamerica...
Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for this
chip shows pin 5 as VDD, and I am wondering, isn't VDD usually the same
as
GND? (Don't see any pins labled as GND, although there is VSS ,which I
am
thinking is +5 volts). And the chip mentioned above is a PLL, btw. Any
help is appreciated...

Thanks,

Dave

I believe you have it backwards, Vdd is + Voltage and Vss is GND.
According
to the data sheet, Vdd can be between +3Volts and +9Volts.
Click to expand...
Yes, I see that now. Had it exactly backwards. <shaking head>

Thanks.
 
Dave Inscribed thus:

"baron" <baron.nospam@linuxmaniac.nospam.net> wrote in message
news:hduff2$e4s$1@news.eternal-september.org...
Dave Inscribed thus:

Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for
this chip shows pin 5 as VDD, and I am wondering, isn't VDD usually
the same as
GND? (Don't see any pins labled as GND, although there is VSS
,which I am
thinking is +5 volts). And the chip mentioned above is a PLL, btw.
Any help is appreciated...

Thanks,

Dave

http://encyclobeamia.solarbotics.net/articles/vxx.html

--
Best Regards:
Baron.

Why *thank you* Baron. Much appreciated...

Dave
Click to expand...
You're welcome.

--
Best Regards:
Baron.
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top