LT1719
4.5ns Single/Dual Supply
3V/5V Comparator with
Rail-to-Rail Output
FEATURES DESCRIPTION
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UltraFast: 4.5ns at 20mV Overdrive The LT 1719 is an UltraFast comparator optimized for low
7ns at 5mV Overdrive voltage operation. The input voltage range extends from
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Low Power: 4.2mA at 3V 100mV below V to 1.2V below V . Internal hysteresis
EE CC
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Separate Input and Output Power Supplies makes the LT1719 easy to use even with slow moving input
(SO-8 Only) signals. The rail-to-rail outputs directly interface to TTL
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Output Optimized for 3V and 5V Supplies and CMOS. Alternatively the symmetric output drive can be
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TTL/CMOS Compatible Rail-to-Rail Output harnessed for analog applications or for easy translation to
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Low Power Shutdown Mode: 0.1A other single supply logic levels. A shutdown control allows
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Low Pro le (1mm) SOT-23 (ThinSOT) Package for reduced power consumption and extended battery life
in portable applications.
The LT1719 is available in the SO-8 and 6-lead SOT-23
APPLICATIONS
package. The SO-8 package has separate supplies which
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High Speed Differential Line Receiver allow exible operation, accomodating separate analog
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Crystal Oscillator Circuits input ranges and output logic levels.
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Level Translators
For a dual/quad comparator with similar performance, see
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Threshold Detectors/Discriminators
the LT1720/LT1721.
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Zero-Crossing Detectors
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
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High Speed Sampling Circuits
Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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Delay Lines
TYPICAL APPLICATION
2.7V to 6V Crystal Oscillator with TTL/CMOS Output Propagation Delay vs Overdrive
2.7V TO 6V
8
25C
1MHz TO 10MHz
7
V = 100mV
2k CRYSTAL (AT-CUT) STEP
+
V = 5V
220
RISING EDGE
6 C = 10pF
LOAD
(t )
PDLH
5
620
GROUND
CASE
4
+
FALLING EDGE
C1
(t )
OUTPUT 3
PDHL
LT1719
2
2k
1719 TA01 1
0.1F 1.8k 0
0 10 20 40 50
30
OVERDRIVE (mV)
1719 TA02
1719fa
1
DELAY (ns)LT1719
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Output Current (Continuous) ........................... 20mA
Supply Voltage
Operating Temperature Range
+V to GND (LT1719S8) ........................................ 7V
C-Grade .................................................. 0C to 70C
S
V to V (LT1719S8) ........................................ 12V
I-Grade ............................................... 40C to 85C
CC EE
+V to V (LT1719S8) ....................................... 12V
Junction Temperature ......................................... 150C
S EE
V to GND (LT1719S8) ....................... 12V to 0.3V
Storage Temperature Range .................. 65C to 150C
EE
+
V to V (LT1719S6) ...............................................7V
Lead Temperature (Soldering, 10 sec) ................. 300C
Input Current (+IN, IN or SHDN) ...................... 10mA
PIN CONFIGURATION
TOP VIEW
TOP VIEW
V 1 8 +V
CC S
+
+IN 2 7 OUT IN 1 6 SHDN
V 2 5 OUT
IN 3 6 SHDN
+
+IN 3 4 V
V 4 5 GND
EE
S6 PACKAGE
S8 PACKAGE
6-LEAD PLASTIC TSOT-23
8-LEAD PLASTIC SO
T = 150C, = 110C/W T = 150C, = 230C/W
JMAX JA JMAX JA
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1719CS8#PBF LT1719CS8#TRPBF 1719 8-Lead Plastic SO 0C to 70C
LT1719IS8#PBF LT1719IS8#TRPBF 1719I 8-Lead Plastic SO 40C to 85C
LT1719CS6#PBF LT1719CS6#TRPBF LTHW 6-Lead Plastic TSOT-23 0C to 70C
LT1719IS6#PBF LT1719IS6#TRPBF LTJF 6-Lead Plastic TSOT-23 40C to 85C
Consult LTC Marketing for parts speci ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based nish parts.
For more information on lead free part marking, go to: