Diodes Incorporated
SO 8

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The AS393/393A consist of two independent precision voltage comparators with a typical offset voltage of 1.0mV and high gain. They are specifically designed to operate from a single power supply over wide range of voltages. Operation from split power supply is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. The AS393/393A series are compatible with industry standard 393. AS393A has more stringent input offset voltage than AS393. The AS393 is available in standard DIP-8, TDIP-8, SOIC-8, TSSOP-8 and MSOP-8 packages, AS393A is available in standard DIP-8 and SOIC-8 packages.


  • Wide Supply Voltage Range - Single Supply: 2.0V to 36V - Dual Supplies: ±1.0V to ±18V
  • Low Supply Current Drain: 0.6mA
  • Low Input Bias Current: 25nA (Typical)
  • Low Input Offset Current: ±5.0nA (Typical)
  • Low Input Offset Voltage: 1.0mV (Typical)
  • Input Common Mode Voltage Range Includes Ground
  • Differential Input Voltage Range Equals to the Power Supply Voltage
  • Low Output Saturation Voltage: 200mV at 4mA
  • Open Collector Output


  • Battery Charger
  • Cordless Telephone
  • Switching Power Supply
  • DC-DC Module
  • PC Motherboard
  • Communication Equipment

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
Minimum Supply Voltage (V) 2 V
Maximum Supply Voltage (V) 36 V
Supply Current @ 5V (per Op Amp) (mA) 0.6 mA
Input Offset Voltage (Typ/Max) 1 to 3 mV
Input Bias Current typ (nA) 25 nA
Minimum Input Common Mode Voltage (V) 0 V
Maximum Input Common Mode Voltage (V) VCC -1.5 V
Output Current Sink (mA) 16 mA
Number of Channels 2
Operating Ambient Temperature Range (°C) -40 to 85 °C
Output Type Open Collector

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Technical Documents

Recommended Soldering Techniques


Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2548 2021-10-08 2022-01-08 Additional Wafer Source (JKFAB), New Bill of Materials (BOM) with PdCu Bond Wire, and Assembly/Test (A/T) Site (CAT)
PCN-2527 2021-06-09 2021-09-09 Additional Wafer Source (GFAB, JKFAB), New Bill of Materials (BOM) with PdCu Bond Wire, and Additional Assembly/Test
(A/T) Site (CAT)