EL2252 Elantec Semiconductor, EL2252 Datasheet

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EL2252

Manufacturer Part Number
EL2252
Description
Dual 50 MHz Comparator/Pin Receiver
Manufacturer
Elantec Semiconductor
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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EL2252 Summary of contents

Page 1

... ECL comparator a a tor circuit blocks used in digital equipment The EL2252 pro- vides a quick 7 ns propagation delay while complying with 10V inputs Input accuracy and propagation delay is main- g tained even with input signal Slew Rates as great as 4000 V The EL2252 can run on supplies as low as ...

Page 2

... Full 4000 8000 Full 3000 2 See Curves 150 150C Test Level Units EL2252C I mV III III III III V V ...

Page 3

... Max and 10V changed from 10V to 15V changed from 10V to 15V a 3 Test Level Units EL2252C Test Level Units EL2252C III III ...

Page 4

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

Page 5

... 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 Transfer Function HYS Connected to V 2252 – EL2252C 2252 – 5 2252 – 7 ...

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 Overdrive 2252 – 9 Output with 50 MHz ECL Input 2252 – 2252 – ...

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 2252 – 13 Propagation Delay vs Temperature ECL Input 2252 – 14 ...

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 – 2252 – 15 2252 – 18 ...

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 and no additional smaller capacitors are necessary The EL2252 requires least 5V to pre- ...

Page 10

... The time delay of the EL2252 will increase by about when using full hysteresis The EL2252 is specifically designed to be tolerent of large inputs It will exhibit very much in- ...

Page 11

... Dual 50 MHz Comparator Pin Receiver EL2252C Macromodel Connections input a l input HYS subckt M2252 Application Hints Connect pin 4 to ground through 1000 M resistor to inhibit Hysteresis to invoke Hysteresis connect pin ...

Page 12

... EL2252C Dual 50 MHz Comparator Pin Receiver EL2252C Macromodel Contd Output Stage 1mA q10 q11 q12 3pF ...

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