Tiny CMOS Comparator with Rail-to-Rail Input and Open Drain Output - LMC7221


Tiny CMOS Comparator with Rail-to-Rail Input and Open Drain Output



The LM7221 is a micropower CMOS comparator available in the space saving 5-Pin SOT-23 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 systems.

For a tiny comparator with a push-pull output, please see the LMC7211 datasheet.


  • Tiny 5-Pin SOT-23 package saves space
  • Package is less than 1.43 mm thick
  • Ensured 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

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Parametrics Compare all products in Comparators

Number of Channels (#)
Output Type
Vs (Min) (V)
Vs (Max) (V)
tRESP Low - to - High (us)
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Max) (mA)
Input Bias Current (+/-) (Max) (nA)
Special Features
Operating Temperature Range (C)
VICR (Max) (V)
Approx. Price (US$)
VICR (Min) (V)
LMC7221 LMP7300 LPV7215
1     1     1    
Open Collector     Open Collector     Push-Pull    
2.7     2.7     2.7    
15     12     5.5    
4     7.7     12    
5     0.75     3.4    
0.014     0.016     0.00092    
0.0004     3     0.001    
In     No      
N/A     Hysteresis
With Voltage Reference    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 125     -40 to 125    
15.2     11.1     5.5    
0.42 | 1ku     0.99 | 1ku     0.49 | 1ku    
-0.2     1     0    

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