Post by thread:[PIC]: Which 18F877

I am going to try programming a 18f877 but I go to microchip.com and it has all these: PIC16F877-20I/L 14.36 PIC16F877-20I/PQ 19.14 PIC16LF877-04I/P 12.58 PIC16F877-04/L 12.20 PIC16F877-20I/P 12.82 PIC16F877-20I/PT 17.32 PIC16LF877-04I/L 14.10 PIC16LF877-04I/PQ 15.98 PIC16F877-20/PT 15.74 PIC16F877-04/P 10.90 PIC16LF877-04I/PT 17.00 I understand what the 04 or 20 mean (Mhz) but I have no idea on the rest. So which do I buy? Any suggestions for a project I am trying to build (Sharpening machine)? Any place to get these chips cheaper? Thanks Wrong Way Ray -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 If you're breadboarding, you'll want the DIP package - /P The other characters designate the temperature range, etc. I think they're listed in the 16F877 datasheet. It might also be a good idea to get ahold of a recent Microchip product lineup card. - -Randy Glenn If you have to ship styrofoam, what DO you pack it in? ================================================= Randy_Glenn-at-tvo.org - PICxpert-at-picxpert.com PICxpert-at-yahoo.com - PICxpert-at-home.com http://www.picxpert.com/ ================================================= - {Original Message removed}

on 3/27/01 2:10 PM, Raymond Choat at .....rcKILLspam@spam@KENAI.NET wrote: > I understand what the 04 or 20 mean (Mhz) but I have no idea on the rest. > So which do I buy? > Any suggestions for a project I am trying to build (Sharpening machine)? > Any place to get these chips cheaper? I indicates the temperature range (Industrial, I think). You can get I or non-I. L, PQ, P, PT all refer to the package. If you look in the 16F877 data sheet, toward the end there is an appendix that shows the different package types. I don't know what they are off the top of my head. The main differences are DIP vs. quad flat packs. I prefer the quad flat packs for surface mount work, but the DIP is easiest to prototype with. You might find some of the chips at http://www.digikey.com/ for less, but they seem to be out of stock on a lot of parts. ------------------------------------------------------------ Roderick Mann rmann @ latencyzero.com.sansspam Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu

I generally get mine from DigiKey or Peter Anderson. You'll find out what those symbols mean on the data sheet (last few pages). Since I have mine handy... PartNumber-FF T /PK PPP PartNumber = Part Number FF = Frequency (04 = 4MHz, 20 = 20MHz) T = Temperature Range b = Commercial 0C to 70C (assumed if blank) I = Industrial -40C to 85C PK = Package PQ = MQFP (Metric Quad Flat Pack) PT = TQFP (Thin ...) SO = SOIC (Small Outline IC, surface mount) SP = Skinny Plastic DIP P = PDIP (Plastic Dual Inline Package) L = PLCC (Plastic Leaded Chip Carrier) PPP = Pattern, Generally used to note mask (factory) programming Chances are you'll want to stick with the P (PDIP) for prototyping (breadboarding, etc). You can also find all the package dimensions on the microchip website. -Adam Raymond Choat wrote: {Quote hidden}> > I am going to try programming a 18f877 > but I go to microchip.com and it has all these: > > PIC16F877-20I/L 14.36 > PIC16F877-20I/PQ 19.14 > PIC16LF877-04I/P 12.58 > PIC16F877-04/L 12.20 > PIC16F877-20I/P 12.82 > PIC16F877-20I/PT 17.32 > PIC16LF877-04I/L 14.10 > PIC16LF877-04I/PQ 15.98 > PIC16F877-20/PT 15.74 > PIC16F877-04/P 10.90 > PIC16LF877-04I/PT 17.00 > > I understand what the 04 or 20 mean (Mhz) but I have no idea on the rest. > So which do I buy? > Any suggestions for a project I am trying to build (Sharpening machine)? > Any place to get these chips cheaper? > > Thanks Wrong Way Ray > > -- > http://www.piclist.com hint: To leave the PICList > .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList EraseMEpiclist-unsubscribe-requestspam_OUTTakeThisOuTmitvma.mit.edu

Hi- Peter Anderson's website is : http://www.phanderson.com 'tis a good site. David "M. Adam Davis" wrote: {Quote hidden}> I generally get mine from DigiKey or Peter Anderson. You'll find out > what those symbols mean on the data sheet (last few pages). Since I > have mine handy... > > PartNumber-FF T /PK PPP > > PartNumber = Part Number > FF = Frequency (04 = 4MHz, 20 = 20MHz) > T = Temperature Range > b = Commercial 0C to 70C (assumed if blank) > I = Industrial -40C to 85C > PK = Package > PQ = MQFP (Metric Quad Flat Pack) > PT = TQFP (Thin ...) > SO = SOIC (Small Outline IC, surface mount) > SP = Skinny Plastic DIP > P = PDIP (Plastic Dual Inline Package) > L = PLCC (Plastic Leaded Chip Carrier) > PPP = Pattern, Generally used to note mask (factory) programming > > Chances are you'll want to stick with the P (PDIP) for prototyping > (breadboarding, etc). You can also find all the package dimensions on > the microchip website. > > -Adam > > Raymond Choat wrote: > > > > I am going to try programming a 18f877 > > but I go to microchip.com and it has all these: > > > > PIC16F877-20I/L 14.36 > > PIC16F877-20I/PQ 19.14 > > PIC16LF877-04I/P 12.58 > > PIC16F877-04/L 12.20 > > PIC16F877-20I/P 12.82 > > PIC16F877-20I/PT 17.32 > > PIC16LF877-04I/L 14.10 > > PIC16LF877-04I/PQ 15.98 > > PIC16F877-20/PT 15.74 > > PIC16F877-04/P 10.90 > > PIC16LF877-04I/PT 17.00 > > > > I understand what the 04 or 20 mean (Mhz) but I have no idea on the rest. > > So which do I buy? > > Any suggestions for a project I am trying to build (Sharpening machine)? > > Any place to get these chips cheaper? > > > > Thanks Wrong Way Ray > > > > -- > > http://www.piclist.com hint: To leave the PICList > > piclist-unsubscribe-requestspam_OUTmitvma.mit.edu > > -- > http://www.piclist.com hint: To leave the PICList > @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList KILLspampiclist-unsubscribe-requestKILLspammitvma.mit.edu

> PIC16F877-20I/L 14.36 > PIC16F877-20I/PQ 19.14 > PIC16LF877-04I/P 12.58 > PIC16F877-04/L 12.20 > PIC16F877-20I/P 12.82 > PIC16F877-20I/PT 17.32 > PIC16LF877-04I/L 14.10 > PIC16LF877-04I/PQ 15.98 > PIC16F877-20/PT 15.74 > PIC16F877-04/P 10.90 > PIC16LF877-04I/PT 17.00 > > I understand what the 04 or 20 mean (Mhz) but I have no idea on the rest. > So which do I buy? You are right, the first number is the max speed in MHz. The "I" before the slash denotes the industrial temperature range. This is -40C to 85C whereas no character denotes the commercial temperature range, 0C to 70C. The L, PQ, PT, and P denote the package. L = plastic leaded chip carrier (PLCC), PQ = plastic quad flatpack (PQFP), PT = plastic thin quad flatpack (TQFP), P = plastic DIP. If this is a one off or small quantities for prototyping, I would get the 20MHz version, commercial temperature range unless you need better, and either the DIP or PLCC package. You can get sockets for these two packages, whereas the others are suface mount. The DIP package will be easier to handle and the sockets will be cheaper. By the way, these prices seem outrageous. I haven't looked, but I bet even DigiKey has them for less. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, RemoveMEolinTakeThisOuTembedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList spamBeGonepiclist-unsubscribe-requestspamBeGonemitvma.mit.edu

----- Original Message ----- From: Raymond Choat <TakeThisOuTrcEraseMEspam_OUTKENAI.NET> To: <RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU> Sent: Tuesday, March 27, 2001 5:10 PM Subject: Re: [PIC]: Which 18F877 {Quote hidden}> I am going to try programming a 18f877 > but I go to microchip.com and it has all these: > > PIC16F877-20I/L 14.36 > PIC16F877-20I/PQ 19.14 > PIC16LF877-04I/P 12.58 > PIC16F877-04/L 12.20 > PIC16F877-20I/P 12.82 > PIC16F877-20I/PT 17.32 > PIC16LF877-04I/L 14.10 > PIC16LF877-04I/PQ 15.98 > PIC16F877-20/PT 15.74 > PIC16F877-04/P 10.90 > PIC16LF877-04I/PT 17.00 > > I understand what the 04 or 20 mean (Mhz) but I have no idea on the rest. > So which do I buy? The 'I' means 'industrial temperature range' The '/XX' defines the package type. The 'LF' says it is capable of running at low voltage. > Any suggestions for a project I am trying to build (Sharpening machine)? > Any place to get these chips cheaper? Much cheaper, many places. Microchip.com is intended to serve as a convenient place to get chips in onesies-twosies, sometimes before they are stocked by the average distributor. I often buy from Digikey.com > Thanks Wrong Way Ray > > -- > http://www.piclist.com hint: To leave the PICList > piclist-unsubscribe-requestEraseME.....mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList EraseMEpiclist-unsubscribe-requestmitvma.mit.edu