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Replacement for MC68HRC705KJ1CDWE

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Replacement for MC68HRC705KJ1CDWE

‎09-09-2009 04:22 PM
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grills
Contributor I

I was just notified that this part has gone obsolete. It has an end of life buy at this time, but I need to come up with a replacement part. Any suggestions or feed back would be much appreciated.

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‎09-09-2009 08:28 PM
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grills
Contributor I
Any other suggestions and feed back would still be much appreciated...
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‎09-10-2009 12:16 AM
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bigmac
Specialist III

Hello,

 

In addition to the MC9S08QG8, other possible possible devices available with reduced pin count packages might include -

MC9S08QB8, MC9S08QE8,  MC9S08SE8, MC9S08SG8, MC9S08SH8

 

Some of the devices are limited to 3.3 volt operation, whereas others are capable of 5 volt operation.  The number of peripherals will vary between devices.

 

Your original code will probably need to be re-written to take into account the new peripheral operational requirements (particularly the timer), and also a potentially higher bus frequency.

 

Regards,

Mac

 

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‎09-10-2009 12:35 AM
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celsoken
Contributor V

Mac is - as always - right. The 3.3V voltage applies to some small 9S08s.

 

And Mac did not mention the HC908 series probably because in some months you could be looking again for a substitute.

 

S08s are also much better for production line, in-circuit (re)flashing will take only one pin at bed-of-nails testing and this pin is not necessarily dedicated. Remeber that KJ1 needed to be pre-programmed before assembly.

 

Regards,

 

Celso

 

 

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‎09-10-2009 02:30 PM
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grills
Contributor I
Thanks again for the information. We actually prefer the chip to be a EPROM rather than flash. But it sounds like we are looking at a complete circuit redesign anyway. I was hoping there would be a closer match. Again thanks and any more information would be helpful as well. You guys are great...
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‎09-09-2009 04:29 PM
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celsoken
Contributor V

I've upgraded KJ1 designs to MC9SQG8. It's a lot more flash, but probably a long life device and probably cheaper.

 

Good luck!

 

Cheers,

 

Celso

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‎09-09-2009 04:40 PM
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grills
Contributor I
I am not able to find any information on the product.
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‎09-09-2009 04:47 PM
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celsoken
Contributor V

Try the link:

 

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=S08QG&nodeId=01624684491437

 

Warning: it is NOT pin-to-pin compatible.

 

Cheers,

 

Celso

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‎09-09-2009 04:54 PM
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grills
Contributor I

Well atleast it is a start. Thanks.

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