ISO6042HDFPR datasheet(30/51 Pages) TI2

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8.5 Device I/O Schematics

INx

VCCI

≅1M

≅1k

Figure 8-2. Input (INx) Default High (Device With H

Suffix) Schematics

VCCI

≅1M

INx

VCCI

≅1k

Figure 8-3. Input (INx) Default High (Device With L

Suffix) Schematics

VCCO

≅22

OUTx

Figure 8-4. Output (OUTx) Schematics

ENx

VCCI

≅1M

≅1k

Figure 8-5. Enable (ENx) Schematics

8.6 Overvoltage Tolerant Input

The input pins of this device, INx and ENx, support input signal voltage in excess of the supply voltage (VCCI)

on the input side of the device as long as the voltage on the inputs remains below the voltages listed in the

Recommended Operating Conditions and Absolute Maximum sections.

This allows the device to support input signal voltages on the inputs when the input supply, VCCI, is unpowered.

In this use case, the outputs transition to the default output state when the input side no longer has a valid

supply.

These inputs also provide the capability of the inputs to down translate input signal voltages up to the VIMAX in

the Recommended Operating Conditions section. For example, an input signal 5V high-level can be used while

VCCI is operating a 3.3V.

ISO6041

SLLSFV3A – DECEMBER 2025 – REVISED MARCH 2026

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ISO6042HDFPR Datasheet(PDF) 30 Page - Texas Instruments