LTC1444 Datasheet | Linear Technology

LTC1443/LTC1444/LTC1445 Ultralow Power Quad parators with Reference Features s s DESCRIPTIO ® s s s s s s s s Ultralow Quiescent Current: 8.5µA Max Wide Supply Range Single: 2V to 11V Dual: ± 1V to ± 5.5V Input Voltage Range Includes the Negative Supply Reference Output Drives 0.01µF Capacitor Adjustable Hysteresis (LTC1444/LTC1445) TTL/CMOS patible Outputs Propagation Delay: 12µs (Typ) (10m V Overdrive) No Crowbar Current 40m A Continuous Source Current Pin patible Upgrades for MAX924 (LTC1443) The LTC 1443/LTC1444/LTC1445 are ultralow power quad parators with a built-in reference. The parators feature less than 8.5µA supply current over temperature, an internal reference (1.182V ±1% for LTC1443 or 1.221V ±1% for LTC1444/LTC1445), programmable hysteresis (LTC1444/LTC1445) and TTL/CMOS output (LTC1443/ LTC1445) that sinks and sources current (open-drain output for LTC1444). The reference output can drive a bypass capacitor of up to 0.01µF without oscillation. The parators operate from a single 2V to 11V supply or a dual ± 1V to ± 5.5V supply (LTC1443). parator hysteresis is easily programmable using two resistors and the HYST pin (LTC1444/LTC1445). Each parator’s input operates from the negative supply to within 1.3V of the positive supply. The LTC1443/LTC1445 parator output stage can continuously source up to 40m A. By eliminating the cross-conducting current that normally happens when the parator changes logic states, power supply glitches are eliminated. The LTC1443/LTC1444/LTC1445 are available in the 16-pin SO and PDIP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. U APPLICATIO S s s s s Battery-Powered System Monitoring Threshold Detectors Window parators Oscillator Circuits TYPICAL APPLICATIO VIN 3.4M 1% 5V TO 8V Reference Settling Test Circuit 3 V+ 5 IN A+ V+ 5V 2 4 IN A - 8V 2m V/DIV + VREF - LTC1445 V- 9 OUT 2ms/DIV LTC1443/1444/1445 - TA02 14 HYST 1.21M 1% R1 10k R2 2.4M...