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Data Sheet
December 1995, Rev. E
tact ERSIL
con -INT
8
1-88
EL2252
FN7062
Dual 50MHz Comparator/Pin Receiver
The EL2252 dual comparator replaces
the traditional input buffer + attenuator
+ECL comparator +ECL to TTL
translator circuit blocks used in digital equipment. The
EL2252 provides a quick 7ns propagation delay while
complying with ±10V inputs. Input accuracy and propagation
delay is maintained even with input signal Slew Rates as
great as 4000V/µs. 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 ±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
stability in the presence of input noise, an internal 60mV of
hysteresis 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”.
Features
• Fast response — 7ns
• 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 — 8000V/V
• Not oscillation-prone
• Can detect 4ns glitches
• MIL-STD-883 Rev. C compliant
Applications
• Pin receiver for automatic test equipment
• Data communications line receiver
• Frequency counter input
• Pulse squarer
Ordering Information
PART NUMBER
EL2252CN
EL2252CM
TEMP. RANGE
0°C to +75°C
0ºC to +75ºC
PACKAGE
14-Pin PDIP
20-Pin SOL
PKG. NO.
MDP0031
MDP0027
Pinouts
EL2252
(14-PIN PDIP)
TOP VIEW
EL2252
(20-PIN SOL)
TOP VIEW
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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