TSEV81102G0FS Evaluation Board User Guide
3-1
0974C–BDC–02/09
e2v semiconductors SAS 2009
Section 3
Operating Characteristics
3.1
Output
Characteristics
In this section, the typical values of the board’s I/O signals and power sources are listed.
These values refer to a nominal use of the evaluation board, they are purely indicative
and may depend on temperature, frequency of use and other parameters.
The following table gives three examples for the DMUX output level settings: ECL,
PECL and TTL.
Note:
One can set the DMUX to several other output formats as long as the buffer output cur-
rent remains below 36 mA and V
PLUSD
stays below 4V with V
PLUSD
- V
EE
< 8.3V. The
output levels are thus given by the following equations:
Note:
β
= 100 and Vbe = 0.9V at ambient temperature and 0.6V at high temperature.
Table 3-1.
Examples of Output Buffer Format Settings
Parameter
ECL
PECL
TTL
Unit
V
PLUSD
0
3.3
3.3
V
V
TT
–2
1.3
0
V
Swing
±0.5
±0.5
±1
V
Reference
–1.58
1.72
1.28
V
V
OH
–1.02
2.28
2.28
V
V
OL
–1.99
1.31
0.28
V
Load
50
50
>75
W
Average output current
14
14
15
mA
Voh
β
R
β
R
600
+
-----------------------
⎠
⎞
V
PLUSD
Vbe
–
600
β
R
----------
Vtt
⎠
⎞
Vol
β
R
β
R
600
+
-----------------------
⎝
⎠
⎛
⎞
V
PLUSD
Vbe
–
600
480
----------
Vrefsa
VEE
–
Vbe
)
–
(
600
β
R
----------
Vtt
⎠
⎞
Vref
β
R
β
R
600
+
-----------------------
⎝
⎠
⎛
⎞
V
PLUSD
Vbe
–
600
960
----------
Vrefsa
VEE
–
Vbe
)
–
(
600
Vtt
×
β
R
------------------------
⎠
⎞
+
–
⎝
⎛
=
+
–
⎝
⎛
=
+
⎝
⎛
⎝
⎛
=
