LTC1443/LTC1444/LTC1445 Ultralow Power Quad Comparators with Reference Fea T Descrip T n Ultralow Quiescent Current: 8.5A Max The LTC 1443/LTC1444/LTC1445 are ultralow power quad n Reference Output Drives 0.01F Capacitor comparators with a built-in reference. The comparators n Adjustable Hysteresis (LTC1444/LTC1445) feature less than 8.5A supply current over temperature, n Wide Supply Range an internal reference (1.182V 1% for LTC1443 or 1.221V Single: 2V to 11V 1% for LTC1444/LTC1445), programmable hysteresis Dual: 1V to 5.5V (LTC1444/LTC1445) and TTL/CMOS output (LTC1443/ n Input Voltage Range Includes the Negative Supply LTC1445) that sinks and sources current (open-drain n TTL/CMOS Compatible Outputs output for LTC1444). The reference output can drive a n Propagation Delay: 12s (Typ) (10mV Overdrive) bypass capacitor of up to 0.01F without oscillation. n No Crowbar Current The comparators operate from a single 2V to 11V supply n 40mA Continuous Source Current or a dual 1V to 5.5V supply (LTC1443). Comparator n Pin Compatible Upgrades for MAX924 (LTC1443) hysteresis is easily programmable using two resistors and n Low Profile (5mm 4mm 0.8mm) DFN Package the HYST pin (LTC1444/LTC1445). Each comparators input operates from the negative supply to within 1.3V of a T the positive supply. The LTC1443/LTC1445 comparator output stage can continuously source up to 40mA. By n Battery-Powered System Monitoring eliminating the cross-conducting current that normally n Threshold Detectors happens when the comparator changes logic states, power n Window Comparators supply glitches are eliminated. n Oscillator Circuits The LTC1443/LTC1444/LTC1445 are available in the L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 16-pin SO, PDIP and DFN packages. Typical a T Reference Settling Test Circuit Reference Settling V 3 IN 8V + V + V 3.4M 5V 1% TO 8V + 5V 5 IN A + 2 OUT V REF 4 IN A 14 HYST 1.21M R1 LTC1445 1% 10k 8 REF OUT 144345 TA02 + 2ms/DIV 1.2V R2 R3 2.4M 430 V C1 9 1.0F 144345 TA01 144345fe 1 2mV/DIV ion pplica ions pplica ion uresLTC1443/LTC1444/LTC1445 a T e Maxi Mu M r a T (Note 1) + Voltage: OUT Short-Circuit Duration (V 5.5V) ........Continuous + + V to V , V to GND, GND to V ...........12V to 0.3V Power Dissipation .............................................. 500mW + + IN , IN , HYST ..................(V + 0.3V) to (V 0.3V) Operating Temperature Range + REF ...................................(V + 0.3V) to (V 0.3V) Commercial..............................................0C to 70C + OUT (LTC1443) ...............(V + 0.3V) to (GND 0.3V) Industrial ............................................ 40C to 85C OUT Storage Temperature Range + (LTC1444/LTC1445) ........(V + 0.3V) to (V 0.3V) PDIP, SO ............................................65C to 150C Current: DFN ....................................................65C to 150C + IN , IN , HYST ................................................. 20mA Lead Temperature Range (Soldering, 10 sec) REF ................................................................... 20mA PDIP, SO ...........................................................300C OUT .................................................................. 50mA p c F T TOP VIEW TOP VIEW OUT B 1 16 OUT C OUT B 1 16 OUT C 2 OUT A 15 OUT D OUT A 2 15 OUT D + + 3 V 14 GND/HYST V 3 14 GND/HYST + + IN A 4 13 IN D IN A 4 13 IN D 17 + + IN A 5 12 IN D IN A 5 12 IN D + + IN B 6 11 IN C IN B 6 11 IN C + + IN B 7 10 IN C IN B 7 10 IN C REF 8 9 V REF 8 9 V N PACKAGE S PACKAGE DHD16 PACKAGE 16-LEAD PDIP 16-LEAD PLASTIC SO 16-LEAD (5mm 4mm) PLASTIC DFN T = 150C, = 90C/ W (N) JMAX JA T = 125C, = 41.7C/ W JMAX JA T = 150C, = 150C/ W (S) JMAX JA EXPOSED PAD (PIN 17) INTERNALLY CONNECTED TO V PIN 14 IS GND FOR THE LTC1443 PIN 14 IS GND FOR THE LTC1443 PIN 14 IS HYST FOR THE LTC1444 AND LTC1445 PIN 14 IS HYST FOR THE LTC1444 AND LTC1445 144345fe 2 ion igura on in ings bsolu