Toshiba Adds Four Products To Quad-Channel Digital Isolator Range For Industrial Equipment

Toshiba Electronic Devices & Storage Corporation has expanded its DCL34xx0B series of quad-channel standard digital isolators with four new products aimed at reducing power consumption in industrial equipment.

The new components deliver current consumption of 0.2mA per channel, are housed in SSOP16 packages and support data transmission speeds of up to 25Mbps.

New Configurations

The four additions come in two channel configurations. The DCL340L0B and DCL340H0B are configured with four forward channels and zero reverse channels, while the DCL342L0B and DCL342H0B feature two forward channels and two reverse channels.

These join the existing DCL341L0B and DCL341H0B, which are already in mass production with a three-forward, one-reverse channel configuration designed to support interfaces incorporating SPI communications.

The full DCL34xx0B series is intended for I/O interface applications requiring multi-channel configurations, allowing engineers to select products based on their specific application requirements.

Addressing Industrial Isolation Needs

In industrial equipment such as programmable logic controllers (PLCs), actuators and inverters, electrical isolation is used to transmit signals between circuits operating at different potentials. This prevents equipment failures, the propagation of abnormalities and malfunctions caused by noise, which increases as devices operate at higher speeds.

All four new products use Toshiba’s proprietary magnetic coupling isolation transmission technology, which integrates a modulation chip and demodulation chip with insulation layers into a single package and uses a magnetic field to transmit signals.

The products incorporate a new circuit technology in the isolation signal transmission section that achieves the 0.2mA per channel power consumption while maintaining stable data transmission at speeds up to 25Mbps.

Specifications

The new isolators are rated for an isolation voltage of 3,000Vrms minimum and operate across a temperature range of -40 to 125 degrees Celsius. The supply voltage range spans 2.25 to 5.5V.

At 1Mbps operation with supply voltages of 3.3V, the four-forward-channel models (DCL340L0B and DCL340H0B) draw typical primary-side current of 0.300mA and secondary-side current of 0.495mA. The bidirectional models (DCL342L0B and DCL342H0B) draw 0.395mA on both sides.

At 25Mbps, current consumption rises to typical primary-side values of 6.7mA for the unidirectional models and 6.1mA for the bidirectional variants.

Propagation delay is rated at a maximum of 52 nanoseconds, and common mode transient immunity is rated at a minimum of 30kV per microsecond.

Target Applications

Toshiba is targeting the products at industrial automation applications including PLCs, I/O interfaces, field devices such as sensors and actuators, motor control, inverters and switching power supplies.

The company positions the low power consumption as relevant to broader carbon neutrality efforts, noting that reducing overall system power consumption has become an increasingly important requirement across electronics, including isolation devices.

Broader Isolator Portfolio

The DCL34xx0B series sits within Toshiba’s wider range of digital isolators. The company also offers the DCL54xx01A series and DCL52xx00 series as standard digital isolators for industrial equipment supporting high-speed data communications, alongside the DCM34xx01 series and DCM32xx00 series for automotive applications.

Toshiba has indicated it plans to continue expanding its digital isolator lineup for both industrial and automotive equipment, broadening channel count and package options. The company also offers photocouplers that provide optical isolation as an alternative isolation technology.

The new products are available for purchase through online distributors. More information is available at Toshiba’s semiconductor website.

Toshiba Electronic Devices & Storage Corporation employs approximately 17,400 people worldwide and produces discrete semiconductors, system LSIs and HDD products.

Last Updated on July 14, 2026 by Nick Ross