TLV1861QDBVRQ1

Comparators Overview

The TLV1861QDBVRQ1 is a single-channel automotive-grade nanopower comparator from Texas Instruments, featuring an open-drain output stage. It operates within a wide supply voltage range of 1.8 V to 40 V while consuming only 440 nA per channel. The device includes fail-safe inputs that maintain high impedance without power and over-the-rail input capability extending up to 40 V independent of the positive supply rail. An internal power-on reset ensures known startup conditions, and reverse battery protection prevents damage during improper installation.

Comparators Feature Summary

• Open-drain output stage suitable for level translation and logical OR'ing
• Fail-safe inputs maintaining high impedance when unpowered
• Over-the-rail input common-mode range extending up to 40 V
• Internal reverse battery protection and power-on reset

Comparators Applications

• Telematics eCall systems
• Automotive head units
• Instrument clusters
• On-board chargers and wireless chargers

Comparators Procurement Notes

Verify the specific suffix DBVR corresponds to the SOT-23-5 package configuration required for your layout. Confirm AEC-Q100 qualification status matches your automotive grade requirements. Ensure pull-up resistor values are selected to optimize logic levels and minimize power dissipation given the open-drain architecture.

Comparators Selection Notes

Select this component when low quiescent current is critical in always-on automotive systems requiring high-voltage tolerance. The open-drain output is necessary if level shifting or wired-OR functionality is needed. Verify that the slow propagation delay characteristics align with the timing requirements of the monitored signals.

Comparators Part Context

This part belongs to the TLV185x-Q1 and TLV186x-Q1 family of nanopower comparators designed for automotive applications. While the TLV185x-Q1 variants feature push-pull outputs, the TLV186x-Q1 series specifically provides open-drain outputs. Both share identical input stages, supply ranges, and nanopower consumption profiles.

Comparators Replacement Considerations

TLV1851QDBVRQ1 (Push-pull output variant)

Comparators FAQ

How does the open-drain output differ from the push-pull option?

The open-drain output sinks current only and requires an external pull-up resistor to define the high state, enabling level translation. The push-pull option sources and sinks current directly without needing an external resistor.

What happens to the inputs if the supply voltage is removed?

The fail-safe input feature maintains the inputs at a high impedance state even when the supply voltage is absent, preventing false triggering due to power sequencing issues.