LMV331X-SC5R

Overview

The LMV331X-SC5R is a single-channel low-power voltage comparator manufactured by 3PEAK, housed in an SOT353 (SC70-5) surface-mount package. It operates within a supply voltage range of 2.5 V to 5.5 V with a typical quiescent current of 50 μA per channel. The device features an open-drain output and includes internal hysteresis for noise immunity. Key electrical specifications include a maximum input offset voltage of ±4 mV, an input bias current of 30 pA, and a high-to-low propagation delay of 120 ns. The common-mode input voltage range extends 100 mV beyond the power supply rails, supporting operation from -40°C to +125°C.

Feature Summary

• Features internal hysteresis to ensure clean switching and improved noise immunity.
• Open-drain output configuration allows flexible logic level shifting and wired-AND functionality.
• Input common-mode voltage range extends 100 mV beyond both negative and positive supply rails.
• Lacks ESD diodes between input/output pins and the positive supply, enabling independent pull-up voltages.

Applications

• Peak and zero-crossing detectors
• Threshold detectors and discriminators
• Logic level shifting or translation
• Window comparators
• IR receivers

Procurement Notes

Verify that the specific part number matches the required SOT353 (SC70-5) package variant. Confirm the operating temperature range aligns with system requirements (-40°C to +125°C). Ensure design accounts for the open-drain output requiring an external pull-up resistor. Check for RoHS compliance and halogen-free status if environmental regulations apply. Validate input voltage limits against absolute maximum ratings to prevent damage.

Selection Notes

Select this component for applications requiring low power consumption and rail-to-rail input capability. The absence of ESD diodes on the inputs and output makes it suitable for level-shifting circuits where the pull-up voltage differs from the supply voltage. Consider the 120 ns propagation delay for timing-sensitive designs. The internal hysteresis reduces the need for external components in noisy environments. Verify compatibility with TTL and CMOS logic levels for direct interfacing.

Part Context

The LMV331X-SC5R belongs to the LMV331X/LMV393X series of general-purpose, low-voltage comparators designed for battery-operated and space-constrained applications. This series offers a cost-effective solution combining low power consumption with high-speed performance. The LMV331X variant provides a single comparator, while other family members offer dual or quad configurations. The SC5R suffix indicates the SOT353 (SC70-5) tape-and-reel packaging format.

Replacement Considerations

LMV331X-S5TR: Same functional comparator but in SOT23-5 package.

FAQ

Can the output pull-up voltage exceed the positive supply voltage?

Yes, because there is no ESD diode between the output pin and the positive supply, the pull-up resistor can be connected to a voltage level independent of the positive supply voltage.

What is the input common-mode voltage range?

The common-mode input voltage range extends 100 mV below the negative supply and 100 mV above the positive supply.