LMV331SN3T1G

Overview

The LMV331SN3T1G is a single-channel general-purpose comparator manufactured by onsemi. It operates within a supply voltage range of 2.7 V to 5.5 V for single-supply applications or ±1.35 V to ±2.75 V for dual supplies. The device features an open-drain output stage, requiring an external pull-up resistor. Key electrical characteristics include a maximum input offset voltage of 7 mV at 5 V and a typical high-to-low propagation delay of 120 ns. It is housed in a SOT-23-5 package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Low-voltage operation suitable for portable consumer products
• Open-drain output configuration for flexible interfacing
• Rail-to-rail input capability extending beyond supply rails

Applications

• Basic comparator circuits for analog-to-digital conversion
• Overcurrent protection systems
• Threshold detection in low-power devices

Procurement Notes

Verify the specific revision level of the datasheet against the manufacturing date code to ensure compatibility with current design specifications. Confirm that the SOT-23-5 package outline matches the PCB footprint requirements. Ensure the open-drain output architecture aligns with the system's logic levels and pull-up resistor constraints before finalizing procurement.

Selection Notes

Select this component when low supply voltage and small form factor are critical constraints. The open-drain output requires careful consideration of the pull-up voltage source to match the downstream logic family. Verify that the 120 ns propagation delay meets the timing requirements of the target application, as it may be slower than high-speed comparators.

Part Context

This part belongs to the LMV331/LMV393/LMV339 series of low-voltage comparators from onsemi. The SN3 suffix indicates the SOT-23-5 surface-mount package, while T1G denotes tape-and-reel packaging. This series is designed for cost-sensitive and space-constrained applications where low power consumption is prioritized over high-speed performance.

Replacement Considerations

LMX331 (Maxim Integrated) offers similar functionality but verify pinout compatibility. LMV331 variants from other manufacturers such as Texas Instruments or Diodes Inc. may serve as functional replacements if package and electrical parameters are identical.