EL2252CN Elantec Inc, EL2252CN Datasheet

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EL2252CN

Manufacturer Part Number
EL2252CN
Description
Dual 50MHz comparator/pin receiver
Manufacturer
Elantec Inc
Datasheet

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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
Features
Applications
Ordering Information
EL2252CN
EL2252CM
Part No
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
Pin receiver for automatic test
equipment
Data communications line
receiver
Frequency counter input
Pulse squarer
Temp Range
0 C to
0 C to
a
a
75 C
75 C
14-Pin P-DIP
20-Lead SOL
Package
Outline
MDP0031
MDP0027
EL2252C
Dual 50 MHz Comparator Pin Receiver
General Description
The EL2252 dual comparator replaces the traditional input
buffer
tor circuit blocks used in digital equipment The EL2252 pro-
vides a quick 7 ns propagation delay while complying with
tained even with input signal Slew Rates as great as 4000 V
The EL2252 can run on supplies as low as
comply with ECL and CMOS inputs or use supplies as great as
The EL2252 has a TTL pin which when grounded restricts
the output V
When left open the output V
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
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’’
Connection Diagrams
g
g
10V inputs Input accuracy and propagation delay is main-
18V for much greater input range
a
14-Pin DIP
Top View
attenuator
OH
to a TTL swing to minimize propagation delay
a
ECL comparator
2252 – 1
OH
increases to a valid CMOS
a
20-Pin SOL
b
ECL to TTL transla-
Top View
5 2V and
b
a
9V and
2252 – 2
s

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EL2252CN Summary of contents

Page 1

... Applications Pin receiver for automatic test equipment Data communications line receiver Frequency counter input Pulse squarer Ordering Information Part No Temp Range Package Outline EL2252CN 14-Pin P-DIP MDP0031 a EL2252CM 20-Lead SOL MDP0027 a 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 ...

Page 2

EL2252C Dual 50 MHz Comparator Pin Receiver Absolute Maximum Ratings Voltage between V and Voltage Voltage between IN and IN pins b a Output Current Current into IN IN HYS TTL ...

Page 3

Dual 50 MHz Comparator Pin Receiver DC Electrical Characteristics V 15V HYS and TTL grounded unless otherwise specified Parameter Description CMRR Common-Mode Rejection Ratio (Note 1) PSRR Power-Supply Rejection Ratio (Note 2) ...

Page 4

EL2252C Dual 50 MHz Comparator Pin Receiver AC Test Circuit Burn-In Circuit 2252 – 2252 – 3 ...

Page 5

Typical Performance Curves Input Bias Current vs Small Overdrives Bias Current vs Temperature Inputs Balanced Input Output Transfer Function HYS Open Dual 50 MHz Comparator Pin Receiver Input Bias Current vs Large Overdrives Input Hysteresis Voltage vs Temperature Input Output ...

Page 6

EL2252C Dual 50 MHz Comparator Pin Receiver Typical Performance Curves Supply Current vs Supply Voltage Output Delay 0 5V Overdrive Output with 50 MHz CMOS Input Contd Supply Current vs Temperature (V 15V Output Delay 0 5V ...

Page 7

Typical Performance Curves Gain vs Frequency Propagation Delay vs Overdrive CMOS Input Dual 50 MHz Comparator Pin Receiver Contd 4 ns TTL Glitch Detection Propagation Delay vs Temperature CMOS Input Propagation Delay vs Input Slew Rate CMOS Input 7 EL2252C ...

Page 8

EL2252C Dual 50 MHz Comparator Pin Receiver Typical Performance Curves Propagation Delay vs Power Supply Voltage 14-Lead Plastic DIP Maximum Power Dissipation vs Ambient Temperature Contd Propagation Delay vs Load Capacitance 20-Lead SOL Maximum Power Dissipation vs Ambient Temperature 2252 ...

Page 9

Simplified Schematic 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 F tantalums are very good ...

Page 10

EL2252C Dual 50 MHz Comparator Pin Receiver Applications Information One of the few ways in which oscillations can be induced is by connecting a high-Q reactive source impedance to the EL2252 inputs Such sources are long wires and unterminated coaxial ...

Page 11

Dual 50 MHz Comparator Pin Receiver EL2252C Macromodel Connections input a l input HYS ...

Page 12

... General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown Elantec Inc reserves the right to make changes in the circuitry or specifications contained herein at any time without notice Elantec Inc assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement ...

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