Spec issue on MSE leakage current in SPI-3

John Lohmeyer lohmeyer at ix.netcom.com
Fri Apr 30 11:10:54 PDT 1999

* From the T10 Reflector (t10 at symbios.com), posted by:
* John Lohmeyer <lohmeyer at ix.netcom.com>
At 4/30/99 01:08 PM, Paul Aloisi wrote (in part):
>The SCSI signals would be fine if we spec 20 micro amps up to 3 volts and 1
>mA up to 4.1 volts. I would not like to see the bus clamped, because some of
>the old active negation drivers drove over 4 volts. 
>John - is the above statement OK or do you need higher current above 3


I suspect we would need a higher current as the output transistor
essentially becomes a forward biased diode as the signal voltage goes above

Fortunately (for me) Frank Gasparik is coming to the SPI-3 meeting next
week and he is much more familiar with the issue.  I think that this topic
should promote some rather lively discussion.


John Lohmeyer                  Email: lohmeyer at ix.netcom.com
LSI Logic Corp.                Voice: +1-719-533-7560
4420 ArrowsWest Dr.              Fax: +1-719-533-7036
Colo Spgs, CO 80907              BBS: +1-719-533-7950

* For T10 Reflector information, send a message with
* 'info t10' (no quotes) in the message body to majordomo at symbios.com

More information about the T10 mailing list