KAWASAKI, Japan--(BUSINESS WIRE)--May 25, 2026--
Toshiba Electronic Devices & Storage Corporation (“Toshiba”) has announced TXZ+™ Family Entry‑Class M4H Group, standard microcontrollers [1] featuring an Arm ® Cortex ® ‑M4 core with a floating-point unit (FPU). The new microcontrollers are designed for application in small‑scale system control of consumer products, such as air conditioners and washing machines, and in industrial equipment, including multifunction printers and factory automation systems. Toshiba is now providing engineering samples of the new products.
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As modern consumer products and industrial equipment become increasingly sophisticated and diversified, microcontrollers used in system control must deliver enhanced real‑time capabilities and stability, support ease of design, deliver the versatility necessary for long‑term operation, and be flexible enough to support development of derivative products. Toshiba has addressed these challenges by developing TXZ+™ Family Entry‑Class M4H Group for system control applications, with an emphasis on versatility.
The new microcontrollers are designed as entry level products that deliver a set of essential functions. They employ an Arm ® Cortex ® ‑M4 core with an FPU, and have a maximum operating frequency of 120MHz—the computing performance and responsiveness required for consumer products and industrial equipment, and they can also handle the core applications of system control, including control logic, interface processing, and timing control.
M4H products support a supply voltage range of 2.7V to 5.5V and, by integrating a high‑speed oscillator with ±1% accuracy, help to reduce external components and improve design flexibility. This suits them for use in consumer products and industrial equipment with 5V power supplies.
The microcontrollers also integrate essential peripheral functions for system control, including a 12‑bit analog‑to‑digital converter (ADC), timers, universal asynchronous receiver/transmitter (UART), serial peripheral interface (SPI), inter‑integrated circuit (I²C [2] ), and direct memory access (DMA [3] ). An additional feature is an advanced programmable motor driver (A‑PMD) that supports brushless DC motor control, ensuring flexible use in line with application requirements and system configurations.
Toshiba supports device evaluation and review with provision of engineering samples and a development environment. The company also supports smooth progress from initial evaluation to application development, by providing starter kits, sample software, CMSIS [4] -compliant drivers, and user environments for major IDEs [5].
Toshiba will continue to expand these enablement resources, including documentation, and will further strengthen its lineup of microcontroller products to meet diverse needs.
Applications
Features
Main Specifications
Follow the links below for more on the new products.
TMPM4H4FYUG
TMPM4H2FYDUG
TMPM4H1FYUG
Follow the link below for more on Toshiba’s microcontrollers.
Microcontrollers
* Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
* TXZ+™ is a trademark of Toshiba Electronic Devices & Storage Corporation.
* Other company names, product names, and service names may be trademarks of their respective companies.
* Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.
About Toshiba Electronic Devices & Storage Corporation
Toshiba Electronic Devices & Storage Corporation, a leading supplier of advanced semiconductor and storage solutions, draws on over half a century of experience and innovation to offer customers and business partners outstanding discrete semiconductors, system LSIs and HDD products.
Its 17,400 employees around the world share a determination to maximize product value, and to promote close collaboration with customers in the co-creation of value and new markets. The company looks forward to building and to contributing to a better future for people everywhere.
Find out more at https://toshiba.semicon-storage.com/ap-en/top.html
Toshiba: TXZ+™ Family Entry‑Class M4H Group, standard microcontrollers featuring an Arm® Cortex®‑M4 core with a floating-point unit (FPU).
Authorities scrambling to find a safe resolution after a tank containing a hazardous chemical was damaged at a Southern California aerospace plant believe the risk of a catastrophic explosion has been eliminated and have lifted evacuation orders for about two-thirds of the 50,000 who were forced to leave their homes.
The storage tank at GKN Aerospace containing about 6,000 to 7,000 gallons (23,000 to 26,500 liters) of methyl methacrylate overheated last week in Garden Grove, a city in Orange County.
Officials have said the tank vented vapors as pressure and temperatures rose, but that monitoring has not detected hazardous chemical levels in the atmosphere. No injuries have been reported.
While officials said Monday that an overnight inspection confirmed a crack in the tank relieved pressure and cooled the chemical, they said some risk to public safety remained including a possible fire, spill or small explosion.
After the tank overheated Thursday, firefighters repeatedly sprayed it with water in an attempt to cool the chemical inside. Officials said Sunday that a crack that developed in the tank lowered the risk of an explosion.
Orange County Fire Authority division chief Craig Covey said a team that evaluated the tank overnight concluded that the temperature inside had dropped and pressure had been released. He called this “incredibly positive news.”
The tank’s interior reached 100 degrees (37.7 Celsius) Sunday, an increase of 10 degrees Fahrenheit (5.5 Celsius) since Saturday, according to Democratic state Sen. Tom Umberg. On Monday, Covey said the temperature fell to 93 degrees F (33.9 degrees C).
Covey announced Monday night that the evacuation area had been greatly reduced and that many of the evacuees could return home.
Methyl methacrylate is a flammable, colorless liquid used in the production of resins, plastics and plastic dentures and is regulated by the federal government.
It can irritate the lungs, eyes and skin and in high doses can cause reduced lung function, along with dizziness and memory problems, according to the Environmental Protection Agency.
In prolonged cases, exposure to methyl methacrylate can cause serious respiratory problems or render a person unconscious.
Tests have found that air pollution in the evacuation zone is within normal limits.
Officials have said the valves on the tank are broken or “gummed up,” which prevented crews from removing the chemical or relieving the pressure on the tank.
The facility specializes in the production of aircraft transparency systems, including cockpit windows, canopies and windshields. British company GKN Aerospace says on its website that its products are used by major commercial and military aircraft manufacturers worldwide.
The company apologized Monday for the “ongoing disruption this incident is causing,” saying in a statement that its specialists and the Orange County Fire Authority had removed external insulation material from the tank to help cool its contents.
If the temperature inside the tank climbed high enough, it would have caused pressure to build as the methyl methacrylate converted from a liquid to a gas, increasing the risk of explosion and possibly igniting other tanks.
A blast would release the chemical to a wider area and could create vapors that would be hazardous to inhale, according to Orange County's top health officer, Dr. Regina Chinsio-Kwong.
Several evacuation shelters opened over the Memorial Day weekend to house the evacuees.
The evacuation zone was west of Anaheim, home to Disneyland’s two theme parks, which were not under evacuation orders. Chinsio-Kwong said people outside the evacuation zone don't need to worry about health impacts.
Associated Press reporter Leah Willingham contributed to this report.
An American Red Cross volunteer walks outside Freedom Hall, an evacuation center in Fountain Valley, Calif.,on Monday, May 25, 2026. (AP Photo/Ethan Swope)
People tend to their pets outside Freedom Hall, an evacuation center in Fountain Valley, Calif., on Monday, May 25, 2026. (AP Photo/Ethan Swope)
Evacuees gather their pets and belongings at the John F. Kennedy High School in La Palma, Calif., on Sunday, May 24, 2026. (AP Photo/Ethan Swope)
The streets remain empty in Garden Grove, Calif., on Sunday, May 24, 2026, after a storage tank containing a chemical used to make plastic parts overheated Thursday at an aerospace plastics facility. (AP Photo/Ethan Swope)
Water is sprayed on a damaged tank at GKN Aerospace in Garden Grove, Calif., on Sunday, May 24, 2026, after the tank containing a chemical used to make plastic parts overheated Thursday. (AP Photo/Ethan Swope)
An evacuee gather their pets and belongings at the John F. Kennedy High School in La Palma, Calif., on Sunday, May 24, 2026. (AP Photo/Ethan Swope)
Water is sprayed on a damaged tank at GKN Aerospace in Garden Grove, Calif., on Sunday, May 24, 2026, after the tank containing a chemical used to make plastic parts overheated Thursday. (AP Photo/Ethan Swope)
Orange County Fire Authority Division Chief Craig Covey speaks during a news conference at the Los Alamitos racetrack in Cypress, Calif., Friday, May 22, 2026, about hazmat situation in Garden Grove, Calif. (Jeff Gritchen/The Orange County Register via AP)
Firefighters work at the scene of a chemical tank that overheated at an aerospace plant in Garden Grove, Calif., Friday, May 22, 2026. (AP Photo/Ethan Swope)
Oscar Bello, who evacuated Anaheim with his pets, shows them off at the John F. Kennedy High School in La Palma, Calif., on Sunday, May 24, 2026. (AP Photo/Ethan Swope)
Water is sprayed on a tank that overheated at an aerospace plant in Garden Grove, Calif., Friday, May 22, 2026. (AP Photo/Ethan Swope)
