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Part No LM311BD
Manufacturer NXP
Catalog Electronic Surplus
Description Voltage comparator
Rohs State Need to verify

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Pricing & Ordering $0.4304 Historical reference price : is the price that a customer announces that it is willing to pay for this component in the previous period, only for reference.
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Availability: 12,500 pieces
MOQ: 90 pcs
Order Increment : 1 pcs
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Products specifications

RoHS State Request Verification
Manufacturer NXP
Win Source Part Number 1198511-LM311BD
Manufacturer Homepage
Popularity Medium
Fake Threat In the Open Market 30 pct.
Supply and Demand Status Limited


Product Overview: LM311BD Voltage Comparator by NXP

The LM311BD is a high-performance voltage comparator designed by NXP Semiconductors, renowned for its reliability and precision in a wide array of electronic applications. This device is engineered to compare two input voltage levels and provide a digital output to indicate which input is higher. The LM311BD is a versatile component commonly employed in applications such as logic voltage levels shifting, relay driving, and analog-to-digital converters.

Key Features

  • Fast Response Time: The LM311BD boasts a typical response time of just 200 ns, making it suitable for high-speed operations.
  • Wide Operating Voltage Range: This comparator can function effectively with a wide range of supply voltages, from 5V to 30V for single supply operation or ±15V for dual supply mode.
  • Output Compatibility: The output of LM311BD can be connected directly to TTL, MOS, or CMOS logic systems without additional interfacing hardware, simplifying the design process.
  • Differential Input Voltage Range: It can handle input voltage levels equal to the supply voltage, providing greater flexibility in various circuit configurations.
  • Low Input Bias Current: The device features a low input bias current, minimizing errors in high-impedance circuit designs.
  • Offset Voltage Adjustment: Users can adjust the offset voltage to optimize performance for specific applications.


With its robust feature set, the LM311BD is suitable for a variety of applications, including:

  • Level shifting for digital logic circuits
  • Analog-to-digital converters
  • Zero-crossing detectors
  • Window comparators
  • Relay drivers
  • Oscillator circuits

Package and Quality

The LM311BD is available in an SOIC-8 package, providing a compact footprint for space-constrained applications. NXP ensures the highest quality standards, with rigorous testing and quality control measures in place to deliver a reliable and consistent product performance.

Whether you're designing industrial control systems, consumer electronics, or automotive applications, the LM311BD voltage comparator from NXP is an excellent choice for a reliable and precise voltage comparison solution.

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