EL2252C
Dual 50 MHz Comparator/Pin Receiver
Simplified Schematic
One Comparator
2252–19
g
when the supplies are 15V. This range dimin-
ishes over temperature and varies with process-
Applications Information
The EL2252 is very easy to use and is relatively
oscillation-free, but a few items must be attend-
ed. The first is that both supplies should be by-
passed closely. 1 mF tantalums are very good and
no additional smaller capacitors are necessary.
a
is 5V more positive than the most positive input
ing; it is wise to set power supplies such that V
b
signal and V more negative than 6V below the
most negative input. 12V supplies will easily
g
encompass all CMOS and ECL logic inputs. If
the input exceeds the device’s common-mode in-
put capability, the EL2252 propagation delay
and input bias current will increase. Fault cur-
b
The EL2252 requires V to be at least 5V to pre-
serve AC performance. V must be at least 6V
a
for a TTL output swing, 8V for CMOS outputs.
b
rents will occur with inputs a diode below V or
shift will occur
even when fault currents within the absolute
maximum ratings.
The input voltage range will be referred to the
more positive of the two inputs. That is, bringing
b
an input as negative as V will not cause prob-
lems; it’s the other input’s level that must be con-
a
above V . No damage nor V
OS
a
b
13/ 12V
sidered. The typical input range is
9
ELANTEC [ ELANTEC SEMICONDUCTOR ]
