Texas Instruments ISO7763DBQR

Overview

ISO7763DBQR from Texas Instruments is a reinforced six-channel digital isolator in SSOP-16 package, providing 3000 VRMS isolation, 100 Mbps data rate, ±100 kV/μs CMTI, and dual 2.25–5.5 V supply operation with level translation. It isolates industrial I/O signals across noisy power domains in motor drives and solar inverters.

For engineers reviewing the ISO7763DBQR datasheet, ISO7763DBQR pinout, ISO7763DBQR application, or ISO7763DBQR equivalent, key selection criteria include its 3000 VRMS DBQ-package isolation rating, 6-channel forward/reverse configurable directionality, robust 12.8 kV surge immunity, and -55°C to +125°C operating range for harsh environments.

Technical Context

The ISO7763DBQR implements dual capacitive SiO₂ isolation barriers per channel, enabling reinforced insulation certified to VDE 0884-17, UL 1577, CSA 62368-1, and CQC GB4943.1. Its architecture supports independent input (VCCI/GNDI) and output (VCCO/GNDO) power domains with 2.25–5.5 V operation on both sides.

Pin configuration places three inputs (INA–INC) and three outputs (OUTD–OUTF) on one side of the isolation barrier, and three outputs (OUTA–OUTC) and three inputs (IND–INF) on the opposite side - enabling mixed-direction signal flow without external logic inversion. Default output state is high (non-F variant).

Key Specifications

Pinout & Package

ISO7763DBQR uses a 16-pin SSOP (DBQ) package measuring 4.90 mm × 3.90 mm, optimized for space-constrained industrial PCBs while maintaining 3.7 mm creepage/clearance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISO7763DWR, ISO7763DBQR trades 2000 VRMS isolation margin for 55% smaller PCB area and lower thermal resistance (RθJA = 86.5°C/W vs. 60.3°C/W), while ADUM7643CRQZ lacks VDE 0884-17 compliance and delivers 40% lower CMTI - making ISO7763DBQR optimal for space-constrained, safety-certified, high-EMC industrial systems.

Availability

ISO7763DBQR is available at Aetrix Electronics and suitable for industrial automation, motor control, and solar inverter designs requiring stable component supply, long-lifecycle assurance, and certified reinforced isolation.

Supply support for ISO7763DBQR 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in isolation, power management, and industrial signal chain technologies.

The ISO776x family was engineered specifically for high-reliability industrial and medical systems demanding robust EMC performance, long-term isolation barrier integrity (>30-year lifetime), and multi-standard safety certification across diverse package options.

FAQ

What is the isolation voltage rating for ISO7763DBQR?

The ISO7763DBQR has a UL 1577-rated isolation voltage of 3000 VRMS, verified for the DBQ-16 SSOP package. This value reflects the maximum AC RMS voltage the device can withstand across its isolation barrier for 60 seconds during qualification testing, and it aligns with reinforced insulation requirements per VDE 0884-17 and CSA 62368-1 for the DBQ variant. The ISO7763DBQR is not rated for 5000 VRMS - that applies only to the DW-16 SOIC version (ISO7763DWR).

Does ISO7763DBQR support level translation between different logic voltages?

Yes, ISO7763DBQR supports bidirectional level translation between 2.25 V and 5.5 V logic domains on both sides of the isolation barrier. Its input buffers accept VCCI from 2.25 V to 5.5 V, and output buffers drive VCCO in the same range - enabling direct interfacing between 3.3 V microcontrollers and 5 V peripheral drivers or 2.5 V ADCs without external level shifters. This capability is inherent to all ISO776x variants including ISO7763DBQR.

How many channels of the ISO7763DBQR operate in reverse direction?

The ISO7763DBQR has three reverse-direction channels: IND→OUTD, INE→OUTE, and INF→OUTF. As shown in Figure 4-4 of the datasheet, inputs IND, INE, and INF are located on the output-side pins (12, 11, 10), while their corresponding outputs OUTD, OUTE, and OUTF reside on the input-side pins (5, 6, 7). This mixed-direction topology enables bidirectional data flow - such as status reporting from isolated power stages - without external logic inversion, a defining feature of the ISO7763DBQR within the ISO776x family.

What safety certifications apply to ISO7763DBQR?

ISO7763DBQR holds VDE 0884-17 (DIN EN IEC 60747-17) reinforced insulation certification, UL 1577 component recognition (3000 VRMS), CSA certification per IEC 62368-1 and IEC 60601-1, CQC GB4943.1 approval, and TUV EN 62368-1/EN 61010-1 certification. All certifications explicitly cover the DBQ-16 package variant. Notably, its DBQ package qualifies for basic insulation per CSA 60601-1 (370 VRMS working voltage) and reinforced insulation per EN 62368-1 up to 370 VRMS - distinct from the DW-16's 5000 VRMS rating.

What is the default output state of ISO7763DBQR when input power is lost?

The ISO7763DBQR has a default-high output state during input-side power loss or signal dropout, consistent with all non-F-suffix ISO776x devices. This behavior is implemented via internal fail-safe circuitry that pulls all six outputs (OUTA–OUTF) to VCCO when VCCI falls below the UVLO threshold (typically 1.7–1.8 V). This ensures predictable logic states in fault conditions - for example, holding gate drivers in OFF state during MCU brownout - and is a documented functional mode confirmed in the ISO7763DBQR datasheet Section 7.4.