available interface
- To: stds-802-3-hssg@xxxxxxxxxxxxxxxxxx
- Subject: available interface
- From: Haim Shafir <hshafir@xxxxxxx>
- Date: Tue, 25 May 1999 10:41:07 -0700
- Cc: oprescu <oprescu@xxxxxxxxxxxxxx>
- Sender: owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx
Currently it seems the poplar choice
is LVDS, for example :
MAXIM MAX3880 LVDS 155Mhz
AMCC S3041 LVDS 311Mhz
but :
min Icc per interface = 4ma
4mA*32 = 128mA
128mA * 3.3 = 0.5Watt
One for receive, one for transmit = 1Watt
add clocks and other stuff and it will be about 1.3Watt
per interface ( if you are lucky )
now 4mA is the min
I have seen chips that burned much more
1.3 Watt is not the end of the world but one can do
much better if one knows the interface is for a
tiny distance, DC coupling, chip2chip (e9 - c2c) 3.3v interface.
We may suggest a new interface ("c2c" ) based on low current CML.
it will not be too difficult or costly for the analog guys to change
the interface.
Haim Shafir
e9 Inc.
PH 408-343-0192 cell 408-892-1838 fax 408-873-2642
hshafir@xxxxxxx