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What is different between 74ls645 and 74ls245

Prodigy 60 points

Replies: 2

Views: 2086

I have some old pcb, it use 74LS645 as buffer. I check datasheet and can not find any differenence between 74ls645 and 74ls245, but if I replace 74LS645 by 74ls245 my pcb doesn't work correctly !

Anyone can tell me what is the differences between 2 buffer?

2 Replies

  • They are the same part. The LS245 is tested to tighter AC specs.  You should not see adifference in them

  • In reply to Chris Cockrill:

    Thank you for your quick reply.

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