Re: IEEE488 electrical specs

From: Ruud Baltissen (
Date: 2001-04-18 13:28:20

Hallo Martijn,

> Does anyone have the *electrical* specifications of the IEEE488 bus?

I have to dig up the exact info at home. But AFAIK you should recon with
about 3 Kohm for every line. This means 15 mA is sufficient enough to drive
8 peripherals.

I assume you intend to use every portpin in bidirectional mode. If not, what
about using the 7406 as driver?

I thought I may have some 8751's laying around, but I'm not able to program
them. Could these be of some help for you?

If you need someone to test it, I can make a print myself with the needed

- Is it going to be bi-directional? (My Tripod lacks this feature :( )
- As you only need about 20 lines, 4 are left over. What a an extra RS232

Groetjes, Ruud

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