Блог компании Texas Instruments (TI) ISO6721 Digital Isolator: A 2-channel 1/1 Isolation Solution with 50 Mbps High-Speed Data Rate and 1.8 V Logic Levels

Texas Instruments (TI) ISO6721: A 2-channel 1/1 digital isolator supporting 50 Mbps and 1.8 V logic levels – Product overview and Mingjiada supply information

Product Overview

The ISO6721 is a high-performance dual-channel digital isolator from Texas Instruments’ ISO672x series. Utilising TI’s dual-capacitor silicon dioxide (SiO₂) insulated-gate technology, the logic inputs and output buffers of each isolation channel are isolated by an insulated gate, providing high electromagnetic immunity and low emissions, whilst also offering low power consumption. The ISO6721 features a 2-channel 1/1 configuration (1 forward channel + 1 reverse channel), making it ideal for communication interface designs such as UART, SPI and CAN that require bidirectional signal isolation.

Key Technical Features

High-Speed Data Transmission and Wide Voltage Support

The ISO6721 supports data rates of up to 50 Mbps with a propagation delay of just 11 ns (typical), meeting the stringent timing requirements of applications such as industrial communication and motor control. The device operates within a wide supply voltage range of 1.71 V to 5.5 V and supports level conversion between 1.71 V and 5.5 V, enabling flexible adaptation to signal transmission requirements across different voltage domains.

Robust and Reliable Isolation Barrier

The ISO6721 utilises TI’s proprietary dual-capacitor silicon dioxide (SiO₂) insulated gate technology, providing isolation ratings of up to 3,000 V rms (D-8 narrow-body package) or 5,000 V rms (DWV-8 wide-body package). Typical common-mode transient immunity (CMTI) reaches ±150 kV/µs, ensuring stable signal transmission even in high-noise environments caused by the rapid switching of power devices.

Ultra-low power consumption and high electromagnetic compatibility

At a data rate of 1 Mbps, the ISO6721 consumes only 1.8 mA per channel (typical), representing a 5- to 10-fold reduction in power consumption compared to traditional optocoupler solutions. The device offers excellent electromagnetic compatibility, with outstanding system-level ESD, EFT and surge immunity, and provides ±8 kV IEC 61000-4-2 contact discharge protection across the entire isolation barrier.

Flexible Default Output Options

The ISO6721 offers two default output options: high level (ISO672xB) and low level (ISO672xFB). In the event of a loss of input power or signal, devices without the ‘F’ suffix default to a high-level output, whilst those with the ‘F’ suffix default to a low-level output, allowing for flexible selection during system design.

Package and Model Information

The ISO6721 series offers a variety of package options to meet the requirements of different application scenarios:

Narrow-body SOIC (D-8) 8 3000 VRMS General industrial applications

Wide-body SOIC (DWV-8) 8 5000 VRMS High-voltage/automotive applications

Typical Applications

Industrial Automation and Fieldbus Communication

The ISO6721 is suitable for signal isolation in applications such as PLCs, motor drivers and industrial fieldbuses. It effectively prevents noise currents on data buses such as UART, SPI, RS-485, RS-232 and CAN from damaging sensitive circuits.

Automotive Electronics and New Energy Vehicles

Automotive-grade ISO6721-Q1 devices are AEC-Q100 certified, with a temperature grade of Class 1 (–40°C to +125°C), and meet VDA320 isolation requirements. They are widely used in applications such as battery management systems (BMS), on-board chargers (OBC), traction inverters and DC/DC converters.

Isolated UART Interface

The ISO6721 requires isolation of only two channels to realise a complete isolated UART interface, offering a simple and user-friendly circuit design. Compared to optocoupler solutions, the ISO6721 digital isolator consumes 5 to 10 times less current, requires no additional passive components, and offers a solution size that is approximately half that of an optocoupler circuit.

Mingjiada Electronics Supply Guarantee

Shenzhen Mingjiada Electronics Co., Ltd. is a distributor of TI (Texas Instruments). Leveraging a global supply chain network covering over 2 million product models, we provide comprehensive supply of TI’s digital isolator product range to the market. For the ISO6721 series, Mingjiada offers the following supply guarantees:

Guarantee of Genuine Manufacturer Products: All supplied TI digital isolators are genuine manufacturer products, ensuring product quality and long-term reliability from the source

Extensive Stock Levels: Stock is held in dual warehouses in Shenzhen and Hong Kong, with long-term stock availability for the full range of TI isolation products

Rapid Response Mechanism: Some urgent orders are supported with 24-hour dispatch, significantly shortening the procurement cycle

Mingjiada Electronics can supply the ISO6721 model ISO6721RBDR, with over 23 part numbers, in SOIC-8 packaging, and supports both bulk purchases and samples.

Contact Details:

Tel: 86-755-83294757

Mobile: +86 13410018555

Email: sales@hkmjd.com

Address: 1239–1241, New Asia Guoli Building, Zhenzhong Road, Futian District, Shenzhen

Tags: ISO6721RBDR, ISO6721RBD, ISO6721RB, ISO6721R, ISO6721

For further information regarding TI’s ISO6721 digital isolators, please contact the professional sales team at Mingjiada Electronics.