High Speed, 30V, Differential Comparator With Strobes

High Speed, 30V, Differential Comparator With Strobes - LM311

Recommended alternative parts

  • LM393  -  Dual differential comparator
  • LMV393  -  Dual general purpose low voltage comparator
  • TLV7011  -  Small Size, Micro Power, Low Voltage Comparator
  • LM339  -  Quad differential comparator
  • LM306  -  Single, Strobed, High Speed Differential Comparator with Push-Pull Outputs

Other devices and data sheet

Other device variants can also be found in the   LM311-MIL product page


The LM111, LM211, and LM311 devices are single high-speed voltage comparators. These devices are designed to operate from a wide range of power-supply voltages, including ±15-V supplies for operational amplifiers and 5-V supplies for logic systems. The output levels are compatible with most TTL and MOS circuits. These comparators are capable of driving lamps or relays and switching voltages up to 50 V at 50 mA. All inputs and outputs can be isolated from system ground. The outputs can drive loads referenced to ground, VCC+ or VCC−. Offset balancing and strobe capabilities are available, and the outputs can be wire-OR connected. If the strobe is low, the output is in the off state, regardless of the differential input.


  • Fast Response Time: 165 ns
  • Strobe Capability
  • Maximum Input Bias Current: 300 nA
  • Maximum Input Offset Current: 70 nA
  • Can Operate From Single 5-V Supply
  • Available in Q-Temp Automotive
    • High-Reliability Automotive Applications
    • Configuration Control and Print Support
    • Qualification to Automotive Standards
  • On Products Compliant to MIL-PRF-38535,
    All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

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Parametrics Compare all products in Comparators

Number of Channels (#)
Output Type
Vs (Min) (V)
Vs (Max) (V)
Propagation Delay Time (uS)
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Max) (mA)
Input Bias Current (+/-) (Max) (nA)
Operating Temperature Range (C)
VICR (Max) (V)
VICR (Min) (V)
Package Group
LM311 LM211 LM211-Q1 LM306
1    1    1    1   
Open Collector    Open Collector    Open Collector    Open Collector   
3.5    3.5    3.5    10   
30    30    30    24   
0.115    0.115    0.115    0.028   
7.5    3    3    5   
7.5    6    6    10   
250    100    100    25000   
No    No    No    No   
Catalog    Catalog    Automotive    Catalog   
0 to 70    -40 to 125
-40 to 85   
-40 to 125    0 to 70   
Vos Adj Pin   
N/A    Strobe    N/A   
28    13.8    28    17   
0.5    -14.7    0.5    7   

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