Texas Instruments ISO6761DWR

Overview

ISO6761DWR from Texas Instruments is a six-channel reinforced digital isolator with 50 Mbps data rate, 5000 VRMS isolation rating, ±150 kV/μs CMTI, and dual 1.71–1.89 V / 2.25–5.5 V supply support. It features forward-direction channel configuration (all six channels unidirectional input-to-output), operates from –40°C to 125°C, and is used in industrial motor drives and grid-connected electricity meters for UART/SPI/RS-485 signal isolation.

For engineers reviewing the ISO6761DWR datasheet, ISO6761DWR pinout, ISO6761DWR application, or ISO6761DWR equivalent, key selection criteria include reinforced isolation certification (VDE 0884-17, UL 1577), 16-pin SOIC-WB package compatibility, channel directionality (ISO6761 = all-forward), and low-power operation at 1.8 V and 3.3 V supplies.

Technical Context

The ISO6761DWR implements TI's double capacitive SiO₂ insulation barrier across six independent CMOS/LVCMOS digital channels, enabling galvanic isolation between input (VCCI/GNDI) and output (VCCO/GNDO) domains. Its architecture supports asymmetric supply operation - e.g., 1.8 V on input side and 5 V on output side - with level translation capability.

It delivers robust EMC performance via system-level ESD/EFT/surge immunity and low emissions, validated per IEC 62368-1, IEC 61010-1, and IEC 60601-1. Default output state is high (non-F suffix), and it includes UVLO with hysteresis (1.1–1.71 V) to ensure predictable power-up behavior.

Key Specifications

Pinout & Package

ISO6761DWR uses a 16-pin SOIC-Wide (DW) package with 10.30 mm × 7.50 mm body size and reinforced creepage/clearance (>8 mm) for reinforced insulation systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar six-channel digital isolator applications.

Compared with ISO6761DWR, ISO6761DR offers identical performance in tape-and-reel format for production lines, while ADUM6761ARIZ trades certification depth and isolation strength for magnetic coupling simplicity - making ISO6761DWR the preferred choice for safety-critical, high-isolation applications requiring long-term reliability and global regulatory acceptance.

Availability

ISO6761DWR is available at Aetrix Electronics and suitable for motor drives, smart electricity metering, and industrial PLC I/O modules requiring stable component supply, long-lifecycle assurance, and full safety certification traceability.

Supply support for ISO6761DWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and communications markets.

The ISO676x family was designed specifically for cost-sensitive industrial isolation applications demanding reinforced safety certification, high noise immunity, and multi-supply flexibility - targeting motor control, energy infrastructure, and factory automation systems.

FAQ

What is the channel configuration of ISO6761DWR?

The ISO6761DWR has all six channels configured in forward direction (input-to-output only), meaning pins INA–INF are inputs and OUTA–OUTF are outputs. This matches the ISO6761 variant designation - distinct from ISO6761F (default-low) or ISO6762 (mixed-direction). The ISO6761DWR pinout is fixed and non-configurable.

Does ISO6761DWR support 1.8 V operation on both sides?

Yes, ISO6761DWR supports 1.71–1.89 V on both VCC1 and VCC2 simultaneously, enabling ultra-low-power isolated interfaces with modern 1.8 V MCUs and peripherals. At 1.8 V, it maintains 50 Mbps data rate and ±150 kV/μs CMTI, with typical supply current of ~7.6 mA per side at 50 Mbps (per datasheet Section 6.15–6.16).

What safety certifications does ISO6761DWR hold?

ISO6761DWR is certified to UL 1577 (5000 VRMS), DIN EN IEC 60747-17 (VDE 0884-17), IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB 4943.1. It achieves 2 MOPP for patient protection and 600 VRMS reinforced working voltage - verified through TDDB lifetime testing and 10 kV surge validation.

How does ISO6761DWR handle power loss on the input side?

When VCC1 drops below UVLO threshold (~1.41 V falling), ISO6761DWR enters undetermined output state briefly, then defaults to high on all OUTx pins due to its non-F suffix. This fail-safe behavior ensures downstream logic remains in a known state during brownout - critical for preventing unintended actuator activation in motor control systems using ISO6761DWR.

Can ISO6761DWR replace older ISO7761 devices?

Yes, ISO6761DWR is a pin-to-pin upgrade to ISO7761 in the same SOIC-16 DW package, offering improved CMTI (±150 kV/μs vs. ±100 kV/μs), higher surge rating (10 kV vs. 6.25 kV), and updated VDE 0884-17 certification. No PCB changes are required, and all timing, supply, and logic interface parameters remain compatible per TI's migration guidance.