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Toshiba to Launch World's Fastest microSD Memory Cards

Toshiba Corporation (TOKYO:6502) today announced that it will launch the world’s fastest[1] microSD memory cards, compliant with UHS-II[2], the ultra high speed serial bus interface defined in SD Memory Card Standard Ver. 4.20. Sample shipments for set manufacturers of smartphones and other mobile devices, and for chipset vendors, start today.

Toshiba: World's Fastest UHS-II compliant microSD Memory Cards (Photo: Business Wire)

Toshiba: World's Fastest UHS-II compliant microSD Memory Cards (Photo: Business Wire)

The new microSD memory cards will be available in 32GB and 64GB capacities. The maximum read speed of 260 MB per second[3] and the maximum write speed of 240MB per second in the 32 GB cards and the maximum read speed of 145MB per second and the maximum write speed of 130MB per second in the 64 GB cards, are all the fastest transfer rates in the industry.

Compared to Toshiba’s current 32GB microSD UHS-I cards[4], the write speed is improved approximately 8 times, while the read speed is improved approximately 2.7 times. The faster transfer speeds can contribute to shortening the time it takes to download large data movie and music files to smartphones and tablets. It will also allow camera users to shoot digital still images continuously at high speed.

In recent years, with the development of high-function smartphones and tablets, the trend is towards higher resolution photos and movies, and multi-function applications, leading to demand for larger external memory and faster transfer speeds. Looking to the future, Toshiba will continue to meet market demands by enhancing its line-up of UHS-II compliant microSD memory cards.


Outline of New Products

Part Number   Capacity   Maximum Transfer Speed   UHS Speed Class
Read   Write
THNSX032GAJCM4 32GB 260MB/s 240MB/s U3
THNSX064GBK5M4   64GB   145MB/s   130MB/s   U3

Key Specifications

Part Number   THNSX032GAJCM4   THNSX064GBK5M4
Capacity 32GB 64GB
Maximum Read Speed 260 MB/s 145 MB/s
Maximum Write Speed 240 MB/s 130 MB/s
UHS Speed Class UHS Speed Class 3

2Lane Half-Duplex
Data rate = 3.12Gbps(HD312)

Data rate = 1.56Gbps(FD156)

Power Supply Voltage VDD1=2.7~3.6V, VDD2=1.7V~1.95V
Compliant Standard SD Memory Card Standard Ver.4.20
File Format FAT32 exFAT
External Dimensions 15.0mm(L)×11.0mm(W)×1.0mm(T)
Weight Approx.   Approx. 0.5g


[1]   As of April 17, 2014. Toshiba survey.
[2] UHS-II is the ultra high speed serial bus interface in SD Memory Card Standard Ver4.20 that delivers data at 156MB/s by single lane access and 312MB/s by dual lane access.
[3] Maximum data writing/reading speed may vary depending on the host device and file size.
[4] microSDHC EXCERIA MUH-A032G (32GB).
Read Speed: 95MB/s, Write Speed: 30MB/s

*SDHC memory cards (32GB) can be used only in SDXC or SDHC compliant devices integrating the FAT32 file format.
*SDXC memory cards (64GB) can be used only in SDXC compliant devices integrating the exFAT file format.

Customer Inquiries:
Memory Marketing Division
Tel: +81-3-3457-3401

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

Toshiba is a world-leading diversified manufacturer, solutions provider and marketer of advanced electronic and electrical products and systems. Toshiba Group brings innovation and imagination to a wide range of businesses: digital products, including LCD TVs, notebook PCs, retail solutions and MFPs; electronic devices, including semiconductors, storage products and materials; industrial and social infrastructure systems, including power generation systems, smart community solutions, medical systems and escalators & elevators; and home appliances.

Toshiba was founded in 1875, and today operates a global network of more than 590 consolidated companies, with 206,000 employees worldwide and annual sales surpassing 5.8 trillion yen (US$61 billion). Visit Toshiba's web site at

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