ISO6040HDFPR datasheet(28/52 Pages) TI2

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8 Detailed Description

8.1 Overview

The ISO604x family of devices have an edge based scheme to transmit the digital data across a silicon dioxide

based isolation barrier.

The digital input signal (IN) of the device is sampled by a transmitter and at every data edge the transmitter

sends a corresponding differential signal across the isolation barrier. When the input signal is static, the refresh

logic periodically sends the necessary differential signal from the transmitter. On the other side of the isolation

barrier, the receiver converts the differential signal into a single-ended signal which is output on the OUT pin

through a buffer. If the receiver does not receive a data or refresh signal, the timeout logic detects the loss of

signal or power from the input side and drives the output to the default level.

8.2 Functional Block Diagram

Refresh

Logic

INx

Differential

Signal

Transmitter

Receiver

Single-ended

Signal

OUTx

Timeout

Logic

ENx

Figure 8-1. Conceptual Block Diagram of an Edge Based Digital Isolator

ISO6041

SLLSFV3A – DECEMBER 2025 – REVISED MARCH 2026

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ISO6040HDFPR 数据表(PDF) 28 Page - Texas Instruments