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Product Detailed Parameters
- Description：GENERAL PURPOSE COMPARATOR, OPEN
- Series：LM331AU
- Mfr：3PEAK
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Differential
- Number of Elements：1
- Output Type：Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±)：2.5V ~ 36V, ±1.25V ~ 18V
- Voltage - Input Offset (Max)：6mV @ 5V
- Current - Input Bias (Max)：0.004µA @ 5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：300µA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-40°C ~ 125°C
- Package / Case：SC-74A, SOT-753
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LM331AU-S5TR is a single-channel voltage comparator from the LM331A series, manufactured by 3PEAK. It operates on a wide supply voltage range of +2.5 V to +36 V (single) or ±1.25 V to ±18 V (dual). Key electrical specifications include a quiescent current of 150 μA per channel, an input bias current maximum of 1 nA at 25°C, and an input offset voltage maximum of ±6.0 mV. The device features an open-collector output capable of wired-AND connections and supports an operating temperature range from −40°C to 125°C.
Feature Summary
- Wide single-supply voltage range up to +36 V or dual supplies up to ±18 V
- Very low supply current drain independent of supply voltage
- Input common-mode voltage range includes ground level
- Outputs connectable for wired-AND relationships with TTL and CMOS compatibility
Applications
- High-speed line or digital line receivers
- Peak and zero-crossing detectors
- Threshold detectors and discriminators
- Sensing at ground or supply lines
Procurement Notes
Verify the specific ordering suffix 'AU' against the manufacturer's official datasheet to confirm pinout configuration and marking information. Ensure the procurement source provides documentation confirming RoHS compliance and halogen-free status as defined by 3PEAK standards. Cross-reference the package type SOT23-5 with the provided tape and reel dimensions for automated assembly compatibility.
Selection Notes
Select this component when battery operation is required due to its low power supply current characteristics. It is suitable for designs requiring direct interfacing with TTL and CMOS logic families without additional level shifting. Consider the open-drain output structure if wired-AND functionality is needed in the system architecture. Verify that the application environment falls within the specified -40°C to 125°C operating temperature range.
Part Context
This part belongs to the LM331A/LM393A/LM339A family of 36-V low-power comparators. The LM331A variant specifically denotes a single-channel configuration, distinguishing it from the dual-channel LM393A and quad-channel LM339A. All devices share similar electrical characteristics and are designed for monolithic integration on a single substrate.
Replacement Considerations
LM331A-S5TR and LM331AU2-S5TR are listed as parameter-equivalent substitutes within the same manufacturer portfolio.
