8 Detailed Description

8.1 Overview

The TLV40x1 devices are low-power comparators that are well suited for compact, low-current, precision voltage

detection applications. With high-accuracy, switching thresholds options of 0.2V, 0.5 V, 1.2V, and 3.2V, 2uA of

quiescent current, and propagation delay of 450ns and 2us, the TLV40x1 comparator family enables power

conscious systems to monitor and respond quickly to fault conditions.

temperature, the TLV40x1 is equally suited for undervoltage and overvoltage applications. In order to monitor

any voltage above the internal reference voltage, an external resistor divider network is required.

The TLV4021S5x functions similar to the TLV40x1Ry comparators except the resistor divider is internal to the

device. Having the resistor divider internal to the device allows the TLV4021S5x to have switching thresholds

higher than the internal reference voltage of 1.2V without any external components.

Table 8-1. TLV40x1 Truth Table

DEVICE

OUTPUT

TOPOLOGY

INPUT VOLTAGE

OUTPUT LOGIC LEVEL

TLV4021R2

TLV4021R1

0.2V, 0.18V

1.2V, 1.18V

Open-Drain

Output high impedance

Output asserted low

TLV4041R2

TLV4041R5

TLV4041R1

0.2V, 0.18V

0.5V, 0.48V

1.2V, 1.18V

Push-Pull

Output asserted high

Output asserted low

TLV4031R2

TLV4031R1

0.2V, 0.18V

1.2V, 1.18V

Open-Drain

Output asserted low

Output high impedance

TLV4051R2

TLV4051R5

TLV4051R1

0.2V, 0.18V

0.5V, 0.48V

1.2V, 1.18V

Push-Pull

Output asserted low

Output asserted high

TLV4021S5x

3.254V, 3.2V

Open-Drain

Output high impedance

Output asserted low

TLV4021, TLV4031, TLV4041, TLV4051

SNVSB04C – MARCH 2019 – REVISED DECEMBER 2021

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