Electrical Engineering - Replacement diff bus xcvr?

Author

Replacement diff bus xcvr?

John E.

2007-03-08, 1:25 pm

The part that has failed has these markings:

LS1176
8AT
D5HT

This is the data sheet for it, I think:

SN65ALS1176:
<www.cgi/http://www.allcomponents.ru...sn65als1176.pdf>

although how to I tell if the failed one is a 65 or 76 prefix part?

Searching local suppliers, I find this:

SN75LBC176A:
<http://www.jameco.com/Jameco/Produc...DS/251053TI.pdf>

Is the second a suitable replacement for the first?

Package is SOIC.

They're both TI, so why the different numbering (1176 vs 176)? What does
65/75 prefix indicate? And regarding the other markings on the failed IC:
does HT mean Hi-Temp?

A few too many discrepancies in my mind to just swap it in just yet.

Thanks,
--
John English

John E.

2007-03-08, 5:25 pm

> although how to I tell if the failed one is a 65 or 76 prefix part?

That should read "...is a 65 or 75 prefix part?".
--
John English

Franc Zabkar

2007-03-09, 5:25 pm

On Thu, 08 Mar 2007 19:24:06 GMT, John E. <incognito@yahoo.com> put
finger to keyboard and composed:

>The part that has failed has these markings:
>
>LS1176
> 8AT
> D5HT
>
>This is the data sheet for it, I think:
>
>SN65ALS1176:
><www.cgi/http://www.allcomponents.ru...sn65als1176.pdf>

This is TI's page:
http://focus.ti.com/docs/prod/folde...n65als1176.html

This is TI's search page:
http://focus-webapps.ti.com/general...earchdevice.tsp

>although how to I tell if the failed one is a 65 or 76 prefix part?

Searching for parts containing "LS1176" at TI's web site finds only
the SN65ALS1176.

>Searching local suppliers, I find this:
>
>SN75LBC176A:
><http://www.jameco.com/Jameco/Produc...DS/251053TI.pdf>
>
>Is the second a suitable replacement for the first?

See TI's documentation:
http://focus.ti.com/docs/prod/folde...n75lbc176a.html

>Package is SOIC.
>
>They're both TI, so why the different numbering (1176 vs 176)? What does
>65/75 prefix indicate? And regarding the other markings on the failed IC:
>does HT mean Hi-Temp?
>
>A few too many discrepancies in my mind to just swap it in just yet.
>
>Thanks,

The LBC devices appear to be upgrades to their respective ALS
versions. They specify lower power and improved ESD.

The 65 versions appear to have a wider operating temp range (-40C to
125C, -40C to 85C) than the 75 versions (0 to 70C).

The datasheets are here:

http://focus.ti.com/lit/ds/symlink/sn65lbc176a.pdf
http://focus.ti.com/lit/ds/symlink/sn75lbc176a.pdf (same as previous)
http://focus.ti.com/lit/ds/symlink/sn65als1176.pdf

All devices have an SN75176 "footprint".

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

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