Need Atmega328p in 32mlf Package - Page 1
Forum section: electronics / general

author: AndyFroncioni
author_rank: Contributor
timestamp: November 10, 2010, 04:42:14 pm
content: I'm having trouble finding a small quantity (20) Atmega328p's in 32 mlf format. Does anyone know where I can buy these?Thanks,Andy

author: slburris
author_rank: Frequent Contributor
timestamp: November 10, 2010, 05:28:46 pm
content: I wish I had an answer for you, but I don't.Try to find an atmega328 inanypackage! No oneseems to have them in stock. I just tried asking for 5 at Digikeyand got a delivery date of Jun 18, 2011! That's more than 7 monthlead time....Scott

author: AndyFroncioni
author_rank: Contributor
timestamp: November 10, 2010, 07:48:38 pm
content: Quote from: slburris on November 10, 2010, 05:28:46 pmThat's crazy! Are Atmel trying to put themselves out of business?!!I need to get a product out in early March. I guess I need to redesign for the MSP430, then.Thanks for your answer.Cheers,Andy

author: Unknown
author_rank: Unknown
timestamp: November 10, 2010, 08:06:28 pm
content: Quote from: AndyFroncioni on November 10, 2010, 07:48:38 pmProbably, availability is an issue with many of their products.Quote from: AndyFroncioni on November 10, 2010, 07:48:38 pmYou could also try an AVR not used in the Arduino or to hack a PS3.

author: TopherTheME
author_rank: Regular Contributor
timestamp: November 10, 2010, 11:58:35 pm
content: I think I might have some laying around that are gfpMy AVR MKII decided to kill itself after only programming a few chips so I've given up on Atmel for the time being.

author: slburris
author_rank: Frequent Contributor
timestamp: November 11, 2010, 05:11:14 am
content: I suppose if you could tolerate PDIP and were desperate, you could buyAruduino Unos, pull the processor, then eventually get new chips, replacethe processor and resell the Unos. Heck, even Amazon carries the unos!I'm started to avoid Atmel like I avoid Maxim because I just have so muchtrouble getting their chips. I kinda wonder if Atmel is even going to bearound in 5 years. I'll bet Microchip will be.In any case, I've started to see the light. My current designs areusing TI (was Luminary Micro, bought by TI) Cortex ARM chips. Theyare generally in stock, cost between $5 and $10 depending on featuresand just make concerns about fitting in memory and performance go away.I'm just not one of those people who enjoys rewriting everything inassembly just to squeeze a few bytes out.Yeah, I still plop down PICs into a few things, but I can now put a$5 ARM chip and a $5 Xilinx FPGA on a board, and those $10 in partscovers such a huge range of the problems I'm designing for that I'mlosing interest in other chips.But that's just me, a hobbyist.Scott

author: Mr J
author_rank: Regular Contributor
timestamp: December 28, 2010, 06:56:33 pm
content: I too have been trying to find a atmega 328 in the mlf, I had to switch to the atmega 168 mlf. Lucky my code is small so no big deal. be carefull of the grey market. there have been slugs going aroundhttp://www.sparkfun.com/news/350.http://www.sparkfun.com/news/384

author: sonicj
author_rank: Frequent Contributor
timestamp: January 02, 2011, 02:32:30 pm
content: if anyone is still looking, digikey has 10k in stock.linknote, they are 20mhz chips. i think sparkfun made that mistake on a bunch of arduino boards...

author: Unknown
author_rank: Unknown
timestamp: January 02, 2011, 03:41:24 pm
content: Quote from: sonicj on January 02, 2011, 02:32:30 pmThe ATmega328p only has one speed grade, as far as I know. What other speed grade would you expect? No ATmega runs at more than 20MHz as far as I know (the Xmega does). Some older ones are only 16MHz, and before the picopower stuff, they sold L grades (eg. ATmega8L) that ran at lower voltages but only up to 8MHz or so.

author: sonicj
author_rank: Frequent Contributor
timestamp: January 04, 2011, 11:05:12 am
content: i mentioned it as 16mhz is the standard for arduino... something worth noting if you are wanting native arduino compatibility or if your code was written on arduino and is dependent on clock speed.

author: Unknown
author_rank: Unknown
timestamp: January 04, 2011, 08:27:13 pm
content: Quote from: sonicj on January 04, 2011, 11:05:12 am20MHz is just the max, any clock source between 32kHz or so and 20MHz will do. The internal oscillator is 8MHz, and can be divided down to 1MHz (which is the default I believe). I don't think there is any ATmega328/168 that's rated for only 16MHz, so I'm not sure what alternative you'd suggest for the Arduino.

author: sonicj
author_rank: Frequent Contributor
timestamp: January 04, 2011, 10:11:36 pm
content: i was under the impression that this was the one with the 16mhz internal oscillator.linkif they can all be set to 16mhz then i guess theres no worries...

author: Psi
author_rank: Super Contributor
timestamp: January 04, 2011, 10:52:26 pm
content: It looks like when you use the internal RC osc on the ATMEGA328p your fixed to 8mhz unlike most other atmegas which have either a clock prescaler or adjustable RC osc so you can set the frequency you want.ATMEGA328P datasheethttp://www.atmel.com/dyn/resources/prod_documents/doc8271.pdf

author: Unknown
author_rank: Unknown
timestamp: January 06, 2011, 11:17:37 pm
content: Quote from: sonicj on January 04, 2011, 10:11:36 pmI think that's a typo by someone at Digikey, the only hits for that type are either Digikey-related or random datasheet sites. The Atmel datasheet only lists 20MHz models. All will run fine at 16MHz, as long as you provide the clock signal (eg. crystal). No ATmega can run at 16MHz on the internal RC oscillator as far as I know.Quote from: Psi on January 04, 2011, 10:52:26 pmThe ATmega328p does have the CLKDIV/8 fuse, which divides the clock by eight. I think most ATmega's are similar in this regard.

author: Psi
author_rank: Super Contributor
timestamp: January 07, 2011, 12:50:26 am
content: Quote from: alm on January 06, 2011, 11:17:37 pmYeah, they dont all have the CLKDIV fuse feature but the ones that do have it enabled by default, it's a real trap for people starting out.

author: madkiwi
author_rank: Newbie
timestamp: March 30, 2011, 11:38:01 am
content: Quote from: Psi on January 07, 2011, 12:50:26 amBeen caught out by this fuse myself!Good trap for young players

author: Bored@Work
author_rank: Super Contributor
timestamp: March 30, 2011, 06:03:39 pm
content: Quote from: madkiwi on March 30, 2011, 11:38:01 amWhy? It is accurately described in the datasheet. Now, if you are too lazy to read the datasheet ...

author: House91320
author_rank: Regular Contributor
timestamp: April 05, 2011, 11:52:16 pm
content: The atmega line has become hard to get in large numbers.