What is an MMC Card?

Written by John Harris, Updated on October 10, 2023

MMC Card

A Multimedia Card (MMC) is a memory card that uses flash memory. The size of multimedia cards varies from 24 mm × 32 mm × 1.4 mm. In the beginning, multimedia cards used a 1-bit serial interface, and in recent years, they have increased the data transfer from 4-bit to 8-bit at a time. MMC card is mostly used in Audio players, Digital cameras, Cell phones, PDAs, etc.

MMCs are almost similar to SD (Secure Digital) cards, and multimedia cards can be used in most of the devices where SD cards can be used.

MMC cards have varying storage capacities, typically 256MB, 512MB, and 128 GB. MMC cards are used in cameras to store photos and videos, and you can use an MMC card reader to transfer the data from the MMC card to the computer.

History of Multimedia Card

MMC cards were introduced in 1997 through a collaboration between SanDisk and Siemens. Early MMC cards had a capacity of around 32 MB, and later versions went up to 1 GB by the late 2000s. The gaming industry and various electronics, including video game consoles, adopted MMC cards as external storage devices.

There is no copyright on MMC technology, allowing for the development of devices using MMCs with the Snapdragon 820 processor cited as an example of its use of MMC technology for fast speeds.

Types of MMC Card

  • Standard MMC: The original MMC card, with dimensions of 32 mm × 24 mm × 1.4 mm.
  • Reduced-Size MultiMediaCard (RS-MMC): A smaller version of the MMC card, with dimensions of 24 mm × 18 mm × 1.4 mm. RS-MMC cards can be used in standard MMC slots with an adapter.
  • Dual Voltage MultiMediaCard (DV-MMC): A type of MMC card that can operate at 1.8 V and 3.3 V, making it compatible with a wider range of devices.
  • MMC plus: A high-speed version of the MMC card with a maximum data transfer rate of 52 MB/s.
  • MMC mobile: A version of the MMC card designed for mobile devices. MMCmobile cards are smaller and thinner than standard MMC cards and consume less power.
  • MMC micro: The smallest type of MMC card, with dimensions of 14 mm × 12 mm × 1.1 mm. MMC micro cards with an adapter can be used in standard MMC and SD slots.


MMC cards are not as common as they once were. Nowadays, SD cards are widely adapted due to their better speed and compatibility at a low cost. However, MMC cards are still used in some devices, such as digital cameras, MP3 players, and GPS devices. If you would like to recover data from an MMC card , it can be done using data recovery software.

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