LT1719 4.5ns Single/Dual Supply 3V/5V Comparator with Rail-to-Rail Output FEATURES DESCRIPTION n 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 n Low Power: 4.2mA at 3V 100mV below V to 1.2V below V . Internal hysteresis EE CC n 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 n Output Optimized for 3V and 5V Supplies and CMOS. Alternatively the symmetric output drive can be n TTL/CMOS Compatible Rail-to-Rail Output harnessed for analog applications or for easy translation to n Low Power Shutdown Mode: 0.1A other single supply logic levels. A shutdown control allows n 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 n High Speed Differential Line Receiver allow exible operation, accomodating separate analog n Crystal Oscillator Circuits input ranges and output logic levels. n Level Translators For a dual/quad comparator with similar performance, see n Threshold Detectors/Discriminators the LT1720/LT1721. n Zero-Crossing Detectors L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n High Speed Sampling Circuits Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n 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: