Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default ISP1181A vs ISP1181B

Hi,

I need to try and replace the USB chip in a rather old device.

The original chip is ISP1181BBS.
I can't find this to buy, but can get ISP1181ABS.


Datasheets are here, but both appear to be pretty much identical.

A:
http://pdf1.alldatasheet.com/datashe.../ISP1181A.html

B:
http://pdf1.alldatasheet.com/datashe.../ISP1181B.html



So, this is kind of a generic question - what what kind of difference might
you expect between these different revisions, and is it worth a punt to
replace the B version with the A version and hope it will work?
The unit is toast as it is, the worst case scenario is it will still be
toast with an A chip installed, but I have to buy the A chip to find out.


Cheers,

Gareth.

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Default ISP1181A vs ISP1181B

On Wednesday, April 5, 2017 at 6:20:18 PM UTC-4, Gareth Magennis wrote:
Hi,

I need to try and replace the USB chip in a rather old device.

The original chip is ISP1181BBS.
I can't find this to buy, but can get ISP1181ABS.


Datasheets are here, but both appear to be pretty much identical.

A:
http://pdf1.alldatasheet.com/datashe.../ISP1181A.html

B:
http://pdf1.alldatasheet.com/datashe.../ISP1181B.html



So, this is kind of a generic question - what what kind of difference might
you expect between these different revisions, and is it worth a punt to
replace the B version with the A version and hope it will work?
The unit is toast as it is, the worst case scenario is it will still be
toast with an A chip installed, but I have to buy the A chip to find out.


Cheers,

Gareth.


It's close enough where I don't see it doing any harm if it's somehow not compatible. In fact, the datasheet seems to be a cut and past except for the A and B suffix.

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