LM393 Low Power Low Offset Voltage Dual Comparator IC

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 The LM393 is made up of two independent precision voltage comparators with offset voltage specifications as low as 2.0 mV max for two comparators that were especially intended to work from a single power supply over a broad variety of voltages. It is also feasible to operate from split power supplies, and the low power supply current drain is independent of the amount of the power supply voltage. These comparators also have an unusual feature in that the input common-mode voltage range includes ground, despite the fact that they are powered by a single power supply voltage. LM393 integrated circuit is the comparator version of the famous LM358 Op-Amp. The LM393 is useful since it has an open collector output that allows it to drive loads. The output transistor can drive loads up to 50V and 50mA, which is sufficient to power most TTL, MOS, and RTL loads. The transistor can also separate the load from the system ground. So, if you're seeking for a Voltage comparator to drive loads with these criteria, this IC would be a good fit.


  • Very Low Supply Current Drain (0.4 mA) — Independent of Supply Voltage
  • Low Input Biasing Current: 25 nA 
  • Low Input Offset Current: ±5 nA 
  • Maximum Offset voltage: ±3 mV
  • Input Common-Mode Voltage Range Includes Ground
  • Differential Input Voltage Range Equal to the Power Supply Voltage 
  • Low Output Saturation Voltage: 250 mV at 4 mA
  • Output Voltage Compatible with TTL, DTL, ECL, MOS and CMOS logic systems
  • See AN-1112 (SNVA009) for DSBGA Considerations 
  • Advantages


Number of channels 2
Output type Open Collector
Propagation delay time (µs) 0.7
Input V(single supply)  2-36V
Input V(Dual supply)  ±1.0 ±18 V 
Vos (offset voltage @ 25 C) (Max) (mV) 5
Iq per channel (Typ) (mA) 0.2
Input bias current (+/-) (Max) (nA) 250
Rail-to-rail Out
Operating Junction temperature range 0 to 70C
VICR (Max) (V) 34.5
VICR (Min) (V) 0
Dimensions 6mm x 5mm x 1.5mm

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