Author Topic: Atmel chip differences  (Read 1286 times)

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Offline IvoS

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Online ataradov

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Re: Atmel chip differences
« Reply #1 on: June 04, 2015, 11:01:48 am »
A versions are made using finer process, so take less silicon. Non-A versions are likely to be old stock, so they are probably were purchased by Mouser at a higher price, and they want to make their money back.

There should be no functional differences as long as your device is within specified ratings. I've seen boards where A version would fail if installed instead of non-A version, but in all of those cases absolute maximum ratings were exceeded (hi to all the people, who think that it is OK to overclock the micro).
« Last Edit: June 04, 2015, 11:10:34 am by ataradov »
Alex
 

Offline miguelvp

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Re: Atmel chip differences
« Reply #2 on: June 04, 2015, 11:09:15 am »
Non-A seems to be older stock probably was more expensive to manufacture. Seems the A is better but I'm not going to go through the whole datasheets, but you should.

A:

• Operating Voltage:
– 1.8 – 5.5V
• Speed Grade:
– 0 – 4 MHz @ 1.8 – 5.5V
– 0 – 10 MHz @ 2.7 – 5.5V
– 0 – 20 MHz @ 4.5 – 5.5V
• Industrial Temperature Range: -40°C to +85°C
• Low Power Consumption
– Active Mode:
• 210 µA at 1.8V and 1 MHz
– Idle Mode:
• 33 µA at 1.8V and 1 MHz
– Power-down Mode:
• 0.1 µA at 1.8V and 25°C

non-A:

• Operating Voltage:
– 1.8 – 5.5V for ATtiny24V/44V/84V
– 2.7 – 5.5V for ATtiny24/44/84
• Speed Grade
– ATtiny24V/44V/84V
• 0 – 4 MHz @ 1.8 – 5.5V
• 0 – 10 MHz @ 2.7 – 5.5V
– ATtiny24/44/84
• 0 – 10 MHz @ 2.7 – 5.5V
• 0 – 20 MHz @ 4.5 – 5.5V
• Industrial Temperature Range: -40°C to +85°C
• Low Power Consumption
– Active Mode (1 MHz System Clock): 300 µA @ 1.8V
– Power-Down Mode: 0.1 µA @ 1.8V
 

Offline Bruce Abbott

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Re: Atmel chip differences
« Reply #3 on: June 04, 2015, 11:12:35 am »
The A version draws less current and has an enhanced power-on reset circuit. See app note AVR526.
 
 

Offline matseng

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Re: Atmel chip differences
« Reply #4 on: June 04, 2015, 12:31:08 pm »
Non-A seems to be older stock probably was more expensive to manufacture.

Both have a "Factory lead time" of two weeks - which might mean that Atmel either have their own "old stock" on hand or are still manufacturing the Non-A part.
 

Offline JoeN

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Re: Atmel chip differences
« Reply #5 on: June 04, 2015, 12:38:05 pm »
Have You Been Triggered Today?
 


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