LMC7221

LMC7221 Tiny CMOS Comparator with Rail-To-Rail Input and Open Drain Output September 1999 LMC7221 Tiny CMOS Comparator with Rail-To-Rail Input and Open Drain Output General Description The LM7221 is a micropower CMOS comparator available in the space saving SOT23-5 package. This makes this comparator ideal for space and weight critical designs. The LMC7221 is also available in the SO-8 package. The LMC7221 is supplied in two offset voltage grades, 5 mV and 15 mV. The open drain output can be pulled up with a resistor to a voltage which can be higher or lower than the supply voltage — this makes the part useful for mixed voltage systems. For a tiny comparator with a push-pull output, please see the LMC7211 datasheet. n n n n n n Guaranteed specs at 2.7V, 5V, 15V supplies Typical supply current 7 µA at 5V Response time of 4 µs at 5V LMC7221 — open drain output Input common-mode range beyond V− and V+ Low input current Applications n n n n n n n Mixed voltage battery powered products Notebooks and PDAs PCMCIA cards Mobile communications Alarm and security circuits Driving low current LEDs Direct sensor interface Features n Tiny SOT 23-5 package saves space n Package is less than 1.43 mm thick Connection Diagrams 8–Pin SO-8 5-Pin SOT23-5 DS012346-1 DS012346-2 Top View Top View Ordering Information Package Ordering Information LMC7221AIM 8-Pin SO-8 LMC7221AIMX LMC7221BIM LMC7221BIMX LMC7221AIM5 5-Pin SOT 23-5 LMC7221AIM5X LMC7221BIM5 LMC7221BIM5X NSC Drawing Number M08A ...