"Baxter" <lbax02.spamguard@baxcode.com> wrote in message news:129mvp6djq9o0c8@corp.supernews.com...> > "Grant Edwards" <grante@visi.com> wrote in message > news:129mnrf11vik1bd@corp.supernews.com... > > On 2006-06-23, Baxter <lbax02.spamguard@baxcode.com> wrote: > > > > >> "Hex" in this case just means there's 6 of 'em. (Not hexadecimal,which> > >> would be 16, just hex - no decimal.) > > > > > > Interesting. I came across some sites where they were comparing Hex > buffers > > > agains Octal buffers. So resolving one issue raises another > > > > Raises what issue? You do know that the prefix "oct" means > > eight, right? > > > I'm primarily a software guy - Octal means base 8 number - Hex is 16-bit > number.Now you are frightning me! How many sides has a hexagon got? And a decahedron? and finally a hexadecahedron? How many arms has an octapus? How many wheels does a 4WD RV have? OK, trick question, spare and steering makes six. Peter
What is a Hex buffer?
Started by ●June 22, 2006
Reply by ●June 23, 20062006-06-23
Reply by ●June 23, 20062006-06-23
Baxter wrote:> "Mike Warren" <miwa-not-this-bit@or-this-csas.net.au> wrote in message >>It means able to pull a high level signal low. The standard terms are >>"source current" which means it outputs a high level and "sink current" >>which means it outputs a low level. In the case of the ICs under >>discussion, they have an open drain (or collector) which means to >>see a high level on the pin it needs to be pulled high by a resistor. >> > > Still pretty murky to me. The Hex Buffer connects to various pins on a > MSP430. Inside the MSP430, I'm setting the pin (voltage) high or low - I > just can't quite picture how the Hex Buffer affects that. As far as that > goes, I'm still wrestling a bit with the semantics of a "pull-up" resistor. >Open collector/drain outputs are useful for several purposes. For example: o Drive a signal that can be driven LOW by more than one outupt. o Wire ORing. Similar to the usage above. Often used for interrupt signals. o LED drivers. The current through the LED is switched ON when the buffer/driver output is turned on to sink the current from the LED. o Level translation. The pullup resistor is tied to a voltage acceptable to the inputs it will be driving. The point I am trying to make here is that there is likely a reason that these open-collector drivers are being used, and we cannot know the reason without understanding more about the circuit. I hope this helps. -- Michael N. Moran (h) 770 516 7918 5009 Old Field Ct. (c) 678 521 5460 Kennesaw, GA, USA 30144 http://mnmoran.org "So often times it happens, that we live our lives in chains and we never even know we have the key." The Eagles, "Already Gone" The Beatles were wrong: 1 & 1 & 1 is 1
Reply by ●June 23, 20062006-06-23
pjberg@webtv.net wrote:> Baxter, > > Does every message comes with your SPAM?Paul Berg, Not that I appreciate spammers any more than you do but, in the 6 years I've been lurking here, Chuck Falconer has been a valued contributor to this NG, bringing light, not heat, to every discussion I've ever seen him enter. In RF terms, he has a very high SNR (Signal-To-Noise-Ratio) in a NG that tends to have that same pleasant characteristic. His signature line certainly is the least offensive form of self- promotion that I encounter on my daily dip into the internet, kind of like your "federal law enforcement (retired)" tag.>From a brief look of your profile, you don't seem to be happyabout a lot of things on a lot of NGs. Could I suggest that, IMHO, this NG doesn't need your protection from the likes of Chuck Falconer and, further, suggest that you move on to someplace that needs your talents more urgently? With the greatest respect for you past contributions to the safety of the American public and my best wishes for a happy and productive retirement. Ken Asbury
Reply by ●June 23, 20062006-06-23
Ken Asbury wrote:> pjberg@webtv.net wrote: >> Baxter, >> >> Does every message comes with your SPAM? > > Not that I appreciate spammers any more than you do but, in > the 6 years I've been lurking here, Chuck Falconer has been ...I don't think his message had anything to do with me, but rather with the (perfectly permissable) mild advertising in Baxters original sig. line. I suspect you are being confused by atrocious threading in the google display. Berg is just confused. -- Chuck F (cbfalconer@yahoo.com) (cbfalconer@maineline.net) Available for consulting/temporary embedded and systems. <http://cbfalconer.home.att.net> USE maineline address!
Reply by ●June 23, 20062006-06-23
Steve at fivetrees wrote:> "Baxter" <lbax02.spamguard@baxcode.com> wrote in message > news:129mdrmtivdop5a@corp.supernews.com...Snip-a-Bit> (i.e. a HIGH input means high output, i.e. no sink, and a LOW input means a > low output, i.e. the output is sinking current).errmm. Low = sourcing current.... :) Rocky
Reply by ●June 23, 20062006-06-23
On 2006-06-23, Baxter <lbax02.spamguard@baxcode.com> wrote:>>>> "Hex" in this case just means there's 6 of 'em. (Not hexadecimal, which >>>> would be 16, just hex - no decimal.) >>> >>> Interesting. I came across some sites where they were >>> comparing Hex buffers agains Octal buffers. So resolving one >>> issue raises another >> >> Raises what issue? You do know that the prefix "oct" means >> eight, right? > > I'm primarily a software guy - Octal means base 8 number - Hex > is 16-bit number.In that case "hex" his short for "hexadecimal". "Octal" means having to do with the number 8. "Hex" means having to do with the number 6. "Hexadecimal" means having to do with the number 16. After you were told that a "hex buffer" is a package that contains six buffers, you really couldn't figure out what an octal buffer was? Even when the data sheets for the parts show that a hex buffer package contains 6 and an octal buffer package contains 8? BTW, there are also hex nuts (which have 6 sides), hex wrenches (6 faces), hexagons (polygons with 6 sides), hexapods (organism with 6 legs), hexane (hydrocarbons with 6 carbons), octal sockets (for tubes with 8 pins), octagons (polygons with 8 sides), octopuses (cephalopods with 8 tentacles), octave (a difference of 8 steps in music), October (the Eighth month in the original Roman calendar), octane (a hydrocarbon with 8 carbons), and so on. -- Grant Edwards grante Yow! Excuse me, but didn't at I tell you there's NO HOPE visi.com for the survival of OFFSET PRINTING?
Reply by ●June 23, 20062006-06-23
On 2006-06-23, Baxter <lbax02.spamguard@baxcode.com> wrote:> Still pretty murky to me. The Hex Buffer connects to various > pins on a MSP430. Inside the MSP430, I'm setting the pin > (voltage) high or low - I just can't quite picture how the Hex > Buffer affects that. As far as that goes, I'm still wrestling > a bit with the semantics of a "pull-up" resistor.When the input pin on an open-drain/open-collector buffer is low, the output pin is shorted to ground. When the input pin on an OC/OD buffer is high, the output pin is not connected to anything. If you want the "not-connected" output pin state to be high, you have to connect a resistor between the output pin and V+. -- Grant Edwards grante Yow! I was in EXCRUCIATING at PAIN until I started visi.com reading JACK AND JILL Magazine!!
Reply by ●June 23, 20062006-06-23
On 2006-06-23, Grant Edwards <grante@visi.com> wrote:> On 2006-06-23, Baxter <lbax02.spamguard@baxcode.com> wrote: > >> Still pretty murky to me. The Hex Buffer connects to various >> pins on a MSP430. Inside the MSP430, I'm setting the pin >> (voltage) high or low - I just can't quite picture how the Hex >> Buffer affects that. As far as that goes, I'm still wrestling >> a bit with the semantics of a "pull-up" resistor.[The description below is for a non-inverting buffer. I tend to assume a "buffer" is non-inverter, otherwise it would have been called an "inverter".]> When the input pin on an open-drain/open-collector buffer is > low, the output pin is shorted to ground. When the input pin > on an OC/OD buffer is high, the output pin is not connected to > anything.[...] -- Grant Edwards grante Yow! Catsup and Mustard at all over the place! It's visi.com the Human Hamburger!
Reply by ●June 23, 20062006-06-23
"Rocky" <robert@suesound.co.za> wrote in message news:1151075230.722755.15310@c74g2000cwc.googlegroups.com...> > Steve at fivetrees wrote: >> "Baxter" <lbax02.spamguard@baxcode.com> wrote in message >> news:129mdrmtivdop5a@corp.supernews.com... > Snip-a-Bit >> (i.e. a HIGH input means high output, i.e. no sink, and a LOW input means >> a >> low output, i.e. the output is sinking current). > > errmm. Low = sourcing current.... :)Huh?? Steve http://www.fivetrees.com
Reply by ●June 23, 20062006-06-23
On 2006-06-23, Steve at fivetrees <steve@NOSPAMTAfivetrees.com> wrote:> "Rocky" <robert@suesound.co.za> wrote in message>>> (i.e. a HIGH input means high output, i.e. no sink, and a LOW >>> input means a low output, i.e. the output is sinking current). >> >> errmm. Low = sourcing current.... :) > > Huh??My reaction also... -- Grant Edwards grante Yow! There's a lot of BIG at MONEY in MISERY if you have visi.com an AGENT!!
