EL2252C
Dual 50 MHz Comparator/Pin Receiver
Features
# Fast responseÐ7 ns
# Inputs tolerate large overdrives
with no speed nor bias current
penalties
General Description
The EL2252 dual comparator replaces the traditional input
a
a a
attenuator ECL comparator ECL to TTL transla-
tor circuit blocks used in digital equipment. The EL2252 pro-
buffer
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.
# Propagation delay is relatively
constant with variations of input
Slew Rate, overdrive,
b
a
The EL2252 can run on supplies as low as 5.2V and 9V and
comply with ECL and CMOS inputs, or use supplies as great as
temperature, and supply voltage
g
18V for much greater input range.
# Output provides proper CMOS or
TTL logic levels
The EL2252 has a /TTL pin which, when grounded, restricts
the output V to a TTL swing to minimize propagation delay.
OH
# Hysteresis is available on-chip
# Large voltage gainÐ8000 V/V
# Not oscillation-prone
When left open, the output V
level.
increases to a valid CMOS
OH
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-
b
# Can detect 4 ns glitches
# MIL-STD-883 Rev. C compliant
Applications
# Pin receiver for automatic test
equipment
sis is available by connecting the HYS pin to V
.
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’’.
# Data communications line
receiver
# Frequency counter input
# Pulse squarer
Connection Diagrams
Ordering Information
Ý
Outline
Part No.
EL2252CN
EL2252CM
Temp. Range
Package
14-Pin P-DIP
20-Lead SOL
14-Pin DIP
20-Pin SOL
a
0 C to 75 C
MDP0031
MDP0027
§
§
a
0 C to 75 C
§
§
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.
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