Toshiba Electronic Devices & Storage Corporation has expanded its DCL34xx0B series of quad-channel digital isolators for industrial applications with the addition of four new devices, targeting reliable, low-power operation in compact system designs.
The new lineup includes DCL340L0B and DCL340H0B, which feature four forward channels, as well as DCL342L0B and DCL342H0B, which support bidirectional communication with two forward and two reverse channels.
Designed for use in equipment such as PLCs, actuators, and inverters, the devices address growing concerns around electrical noise and system reliability as operating speeds increase.
By providing electrical isolation between circuits operating at different voltage levels, the new isolators help prevent faults, suppress noise-related malfunctions, and ensure stable system performance in demanding environments.
All four devices are built on Toshiba’s proprietary magnetic coupling isolation technology, delivering a balance of high reliability and long service life. They also incorporate new circuit design enhancements that enable low power consumption of just 0.2 mA per channel while supporting data rates of up to 25 Mbps.
The isolators are rated for a minimum isolation voltage of 3,000 Vrms and operate across a wide temperature range from -40 °C to 125 °C, with a supply voltage range of 2.25 V to 5.5 V. Housed in a compact SSOP16 package, they are well-suited for space-constrained industrial designs.
The DCL34xx0B series complements Toshiba’s broader isolation portfolio, which includes the DCL54xx01A Series and DCL52xx00 Series for high-speed industrial communications, as well as automotive-focused solutions such as the DCM34xx01 Series and DCM32xx00 Series.
With demand rising for compact, energy-efficient, and highly reliable isolation devices, Toshiba said it will continue expanding its lineup to support industrial and automotive systems, contributing to improved system efficiency and long-term sustainability.
Notes:
[1] Calculated using 1Mbps operating current value, derived from (IDD1+IDD2) divided by four channels.
Measurement conditions: VDD1=VDD2=3.3V, data transmission rate tbps=1Mbps, CL=15pF, Ta=25°C
[2] Communications speed range of up to 25Mbps
[3] A signal transmission method that integrates a modulation chip and a demodulation chip with insulation layers into a single package and uses a magnetic field to transmit signals.
[4] SPI (Serial Peripheral Interface): A synchronous serial communications method that transmits and receives data in synchronization with a clock signal.
Applications
- Industrial automation (programmable logic controllers (PLCs), I/O interfaces, etc.)
- Field devices (sensors, actuators, etc.)
- Motor control
- Inverters
- Switching power supply
Features
- Low operating current consumption: 0.2mA (typ.) per channel[1]
- Supports mid-speed data transmission: tbps=25Mbps (max)
- Wide operating temperature range: Topr=-40 to 125°C
- Quad-channel configuration:
Four forward channels, zero reverse channels (DCL340L0B, DCL340H0B)
Two forward channels, two reverse channels (DCL342L0B, DCL342H0B)
- SSOP16 package
