Forum»Forum › Analog electronics › An urgent basic question?

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The OP

Published on 2006-10-30 22:28 Only look at the author

An urgent basic question? [Copy link]

Can any senior tell me what chip to use when the logic voltage does not match?
I want to use the output of a counter 74ls191 as the address, but its high potential
output power supply is 5v. And the address of my eprom is 12 volts.
What chip can convert the two voltages? Urgent question. Thank you!

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仙猫

Even when programming, only one leg of the EPROM uses 12V, and that is not the address line. Details Published on 2008-3-6 11:57

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liandc

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Published on 2006-11-3 14:34 Only look at the author

EPROM uses 12V voltage only when programming. You can drive it directly with TTL level without worry.

This post is from Analog electronics

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yxl0205

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Published on 2006-11-15 13:38 Only look at the author

Agree with the above

This post is from Analog electronics

duantonglei

25 Posts	0 Resources

Published on 2008-3-3 19:55 Only look at the author

Pull-up resistor is OK

This post is from Analog electronics

laobo

142 Posts	0 Resources

Published on 2008-3-6 11:37 Only look at the author

Add a tube.

This post is from Analog electronics

仙猫

3138 Posts	0 Resources

Published on 2008-3-6 11:57 Only look at the author

Even when programming, only one leg of the EPROM uses 12V, and that is not the address line.

This post is from Analog electronics

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