LMC7221 Tiny CMOS Comparator with Rail-To-Rail Input and Open Drain Output
September 2006
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 5-Pin SOT23 package. This makes this
comparator ideal for space and weight critical designs. The
LMC7221 is also available in the 8-Pin SOIC 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 sys-
tems.
For a tiny comparator with a push-pull output, please see the
LMC7211 datasheet.
Features
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Tiny 5-Pin SOT23 package saves space
Package is less than 1.43 mm thick
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
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Mixed voltage battery powered products
Notebooks and PDAs
PCMCIA cards
Mobile communications
Alarm and security circuits
Driving low current LEDs
Direct sensor interface
Connection Diagrams
8-Pin SOIC
5-Pin SOT23
01234601
01234602
Top View
Top View
Ordering Information
Package
Part Number
LMC7221AIM
8-Pin SOIC
LMC7221AIMX
LMC7221BIM
LMC7221BIMX
LMC7221AIM5
5-Pin SOT23
LMC7221AIM5X
LMC7221BIM5
LMC7221BIM5X
Package Marking
LMC7221AIM
LMC7221BIM
C01A
C01B
Transport Media
95 Units/Rail
2.5k Units Tape and Reel
95 Units/Rail
2.5k Units Tape and Reel
1k Units Tape and Reel
3k Units Tape and Reel
1k Units Tape and Reel
3k Units Tape and Reel
MF05A
M08A
NSC Drawing
© 2006 National Semiconductor Corporation
DS012346
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
