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
EL2252C
Dual 50 MHz Comparator Pin Receiver
Absolute Maximum Ratings
(T
A
e
25 C)
Voltage between V
a
and V
b
Voltage at V
a
Voltage between
b
IN and
a
IN pins
Output Current
Current into
a
IN
b
IN HYS
or TTL
36V
18V
36V
12 mA
5 mA
Internal Power Dissipation
Operating Ambient Temperature Range
Operating Junction Temperature
Storage Temperature Range
See Curves
b
25 C to
a
85 C
150 C
b
65 to
a
150C
Important Note
All parameters having Min Max specifications are guaranteed The Test Level column indicates the specific device testing actually
performed during production and Quality inspection Elantec performs most electrical tests using modern high-speed automatic test
equipment specifically the LTX77 Series system Unless otherwise noted all tests are pulsed tests therefore T
J
e
T
C
e
T
A
Test Level
I
II
III
IV
V
Test Procedure
100% production tested and QA sample tested per QA test plan QCX0002
100% production tested at T
A
e
25 C and QA sample tested at T
A
e
25 C
T
MAX
and T
MIN
per QA test plan QCX0002
QA sample tested per QA test plan QCX0002
Parameter is guaranteed (but not tested) by Design and Characterization Data
Parameter is typical value at T
A
e
25 C for information purposes only
DC Electrical Characteristics
V
S
e
g
15V
Parameter
V
OS
Description
Input Offset Voltage
Temp
25 C
Full
TCV
OS
I
B
Average Offset Voltage Drift
Input Bias Current at Null
Full
25 C
Full
I
OS
Input Offset Current
25 C
Full
R
IN
diff
R
IN
comm
C
IN
V
CM
a
V
CM
b
A
VOL
Input Differential Resistance
Input Common-Mode Resistance
Input Capacitance
Positive Common-Mode
Input Range
Negative Common-Mode
Input Range
Large Signal Voltage Gain
V
O
e
0 8V to 2 0V
25 C
25 C
25 C
Full
Full
25 C
Full
HYS and TTL grounded T
A
e
25 C unless otherwise specified
Min
Typ
1
Max
9
13
7
6
16
21
02
1
2
30
10
2
10
b
9
Test Level
EL2252C
I
III
V
I
III
I
III
V
V
V
II
II
I
III
Units
mV
mV
mV
C
mA
mA
mA
mA
kX
MX
pF
V
V
V V
V V
TD is 3 3in
13
b
12
4000
3000
8000
2
EL2252C
Dual 50 MHz Comparator Pin Receiver
DC Electrical Characteristics
V
S
e
g
15V HYS and TTL grounded T
A
e
25 C unless otherwise specified
Parameter
CMRR
PSRR
V
HYS
V
OH
Description
Common-Mode Rejection Ratio
(Note 1)
Power-Supply Rejection Ratio
(Note 2)
Peak-to-Peak Input Hysteresis
with HYS connected to V
b
High Level Output CMOS Mode
TTL Mode
V
OL
Low Level Output I1
e
0
I1
e
5 mA
I
S
a
I
S
b
Positive Supply Current
Negative Supply Current
Temp
Min
Contd
Typ
Max
Test Level
EL2252C
Units
Full
Full
25 C
Full
Full
Full
Full
Full
Full
70
70
95
90
60
II
II
V
51
32
08
08
19
20
II
II
II
II
II
II
dB
dB
mV
V
V
V
TD is 2 5in
TD is 2 2in
V
mA
mA
40
24
b
0 2
b
0 2
46
27
02
04
16
17
AC Electrical Characteristics
V
S
e
g
15V C
L
e
10 pF T
A
e
25 C TTL output threshold is 1 4V CMOS output threshold is 2 5V unless otherwise specified
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