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Product Detailed Parameters
- Description：GENERAL PURPOSE COMPARATOR, OPEN
- Series：LM331AU2
- 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 LM331AU2-S5TR is a single-channel 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 parameters include a quiescent current of 150 μA per channel, maximum input bias current of 1 nA at 25°C, and maximum input offset voltage of ±6.0 mV. The device features an open-collector output capable of wired-AND connections, with an operating temperature range from −40°C to 125°C. It is housed in a SOT23-5 package.
Feature Summary
- Wide single or dual supply voltage operation capability
- Low power consumption with supply current independent of voltage
- Input common-mode voltage range includes ground level
- Outputs support wired-AND logic configurations
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 suffix AU2 against the datasheet order information to confirm pinout compatibility, as variations exist within the SOT23-5 package family. Ensure the application circuit accounts for the open-collector output requirement by including an appropriate pull-up resistor. Confirm that the system environment remains within the specified -40°C to 125°C operating temperature range for guaranteed performance.
Selection Notes
Select this component when low power consumption is critical alongside wide supply voltage flexibility. The inclusion of ground in the common-mode input range makes it suitable for single-supply applications requiring signal sensing near zero volts. The open-drain output allows for easy interfacing with various logic families, including TTL and CMOS, without additional level shifting components.
Part Context
This part belongs to the LM331A/LM393A/LM339A family of 36-V low-power comparators produced by 3PEAK. The LM331AU2 variant specifically denotes a single-channel device in a SOT23-5 package with a defined pin configuration distinct from other suffixes like LM331A or LM331AU. The series is designed for battery-operated systems due to its constant current drain characteristics.
Replacement Considerations
Public documentation confirms direct replacement compatibility with TS391 and TL331 series products.
