EL2252C
EL2252C
Dual 50 MHz Comparator Pin Receiver
Features
Fast response 7 ns
Inputs tolerate large overdrives
with no speed nor bias current
penalties
Propagation delay is relatively
constant with variations of input
Slew Rate overdrive
temperature and supply voltage
Output provides proper CMOS or
TTL logic levels
Hysteresis is available on-chip
Large voltage gain 8000 V V
Not oscillation-prone
Can detect 4 ns glitches
MIL-STD-883 Rev C compliant
General Description
The EL2252 dual comparator replaces the traditional input
buffer
a
attenuator
a
ECL comparator
a
ECL to TTL transla-
tor circuit blocks used in digital equipment The EL2252 pro-
vides a quick 7 ns propagation delay while complying with
g
10V inputs Input accuracy and propagation delay is main-
tained even with input signal Slew Rates as great as 4000 V
ms
The EL2252 can run on supplies as low as
b
5 2V and
a
9V and
comply with ECL and CMOS inputs or use supplies as great as
g
18V for much greater input range
The EL2252 has a TTL pin which when grounded restricts
the output V
OH
to a TTL swing to minimize propagation delay
When left open the output V
OH
increases to a valid CMOS
level
The comparators are well behaved and have little tendency to
oscillate over a variety of input and output source and load
impedances They do not oscillate even when the inputs are
held in the linear range of the device To improve output stabili-
ty in the presence of input noise an internal 60 mV of hystere-
sis is available by connecting the HYS pin to V
b
Elantec’s products and facilities comply with MIL-I-45208A
and other applicable quality specifications For information on
Elantec’s processing see Elantec document QRA-1 ‘‘Elantec’s
Processing Monolithic Integrated Circuits’’
Applications
Pin receiver for automatic test
equipment
Data communications line
receiver
Frequency counter input
Pulse squarer
Ordering Information
Part No
EL2252CN
EL2252CM
Temp Range
0 C to
a
75 C
0 C to
a
75 C
Package
14-Pin P-DIP
20-Lead SOL
Outline
MDP0031
MDP0027
Connection Diagrams
14-Pin DIP
20-Pin SOL
December 1995 Rev E
2252 – 1
Top View
2252 – 2
Top View
Note
All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication however this data sheet cannot be a ‘‘controlled document’’ Current revisions if any to these
specifications are maintained at the factory and are available upon your request We recommend checking the revision level before finalization of your design documentation Patent pending
1995 Elantec Inc
ELANTEC [ ELANTEC SEMICONDUCTOR ]
