Difference Between SD and MMC

Edited by Diffzy | Updated on: September 23, 2023


Difference Between SD and MMC

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There are different memory cards on the showcase. When you purchase an off-base card for your advanced gadget, it's conceivable that your gadget can't get to the card. In this post, some common memory card sorts are explained to you, counting SD, TF, CF, MMC, MS, xD, and XQD cards.

Memory cards are used to expand the storage capacity of mobile phones, SLRs, dashcams, drones and other electronic products. Normally we refer to the memory card as an SD card. But, what we call them is inaccurate, There are many types of memory cards, and an SD card is only one of them and one of them is a Micro SD Memory Card (TF card).

SD and MMC are utilized for capacity in a versatile gadget. They are accessible in different sizes. SD stands for Secure Digital, while MMC stands for Multi Media Card. They have their characteristics and vary from each other.


When we look at every user card we usually see an SD/MMC slot. From this, we cannot help but think about the difference between MMC and SD interfaces. Many similarities are the same between MMC and SD cards, including the physical and electronic structure. Program-level commands form the basis for changing these two parameters. Since MMC and SD cards are similar, different devices can support them using the same device.

The MMC standard gave rise to SD. Even though they now do not differ in the aspect of sets of commands, the two are still electrically congruous. SD card kept certain commands including others and expelling others.

MMC and SD cards have the same physical and electrical details but distinctive program controls. They both are utilized as capacity gadgets. SDIO and SD-Combo cards join Input/Output usefulness (like Bluetooth, Wi-Fi, GPS, etc.) without and with the capacity office separately. So, an SD-Combo card can act as a Wi-Fi connector in conjunction with a capacity gadget.

Whereas SD cards are based on the MMC arrangement, the two are very divergent in appearance. SD cards were made lopsidedly in arrangement to maintain a strategic distance from inclusion within the off-base course. They are too thicker than MMC cards, with measurements ordinarily extending around 32 mm x 24 mm x 2.1 mm.

Most MMC cards have estimations around 24 mm x 32 mm x 1.4 mm. As for the electronic make-up of the SD card, it shifts basically from the MMC. The SD card’s electrical contacts are secured underneath the surface of the card.

This, of course, guarantees them from physical contact with the fingers of the one utilizing the card. The trade rates are additionally a bit speedier than those of standard MMC cards. SD cards can trade things at a rate of 10 – 20 MB per minute.

Differences Between SD and MMC in Tabular Form

MMC and Sd-card share numerous standard highlights and have the same physical and electrical determinations. The contrasts between the two measures are primarily on the program-level commands.

SD stands for Secure Digital card.MMC stands for Multi Media Card.
It was introduced in 1999 by Matsushita, SanDisk and Toshiba.It was developed in 1997 by Siemens AG and SanDisk.
It stores up to 2GB capacity.It stores up to 128 GB, and MiCard has a theoretical maximum size of 2048 GB (2 TB).
Its types are standard SD, mini SD and Micro SD.Its types are Reduced-Size Multi Media Card, dual voltage MMC card, MMC plus, MMC mobile, MMC micro and MMC secure.
It is Compatible only with SD host devices.It is Compatible with MMC as well as SD card slots.
SD card is a flash memory card standard.It is a flash memory card standard.
SD card is utilized as a capacity media in Sony PS 3, Wii, GP2X GNU/Linux based versatile recreations support, Touch radios, Global Positioning System recipients, Camcorders, cellular phones, computerized sound players, PDAs etc.They are ordinarily utilized as capacity media for gadgets such as advanced cameras, cellular phones, computerized sound players and PDAs.
Size measurements are 24 mm × 32 mm × 2.1 mm.Size measurements are MMC, MMC Plus, SecureMMC -24 mm x 32 mm x 1.4 mm, RS-MMC - 24 mm x 18 mm x 1.4 mm, MMCmicro 14 mm × 12 mm × 1.1 mm
These cards cannot integrate independently with the PCBs.These cards can integrate independently with the PCBs.
It uses the exFAT file systemThis card uses the FAT32 file system
In-built security features such as a write-protect notch and 16-byte password protection are available in this type of card.No in-built security protocols are offered by this card.

What is SD?

Secure Digital (SD) memory card is one of the foremost well-known non-volatile detachable information capacity media for customer applications. It’s not aiming to evacuate the hard disk. A hard disk can still provide much superior speed and memory capacity. SD card is utilized in applications requesting ideal memory capacity, smaller estimates, and low-end items fetched. The combination of a little impression, lower fetched, and ideal execution contributed to SD-card’s victory.

Secure Digital, authoritatively truncated as SD, could be an exclusive non-volatile streak memory card created by the SD Affiliation (SDA) for utilisation in versatile devices.

The standard was presented in August 1999 by joint endeavours between SanDisk, Panasonic (Matsushita) and Toshiba as an enhancement over Multi Media Cards (MMCs). SDs have gotten to be the industry standard. The three companies shaped SD-3C, LLC, a company that licenses and implements mental property rights related to SD memory cards and SD and auxiliary products.

The companies too shaped the SD Affiliation (SDA), a non-profit organization, in January 2000 to advance and make SD Card standards. SDA nowadays has roughly 1,000 different companies. The SDA employs a few trademarked logos claimed and authorized by SD-3C to uphold compliance with its determinations and guarantee client compatibility.

Both MMC and SD cards give encryption capabilities for secured substances to guarantee the secure conveyance of copyrighted fabric, such as computerized music, video and e-books. SD cards are accessible with a capacity as tall as 4 GB.

SD cards are rougher than conventional capacity media. They have a working stun rating fundamentally, the stature you'll be able to drop them from and still have them work.

SD card formats include:

  • SD Standard Capacity: Capacities for SDSC cards run from 128 megabytes to 2 GB. The default arrangement for these cards is FAT16 (Record Allotment Table 16).
  • SD Tall Capacity: Based on the SDA 2.0 determination, capacities for SDHC cards extend from 4 GB to 32 GB. The default arrangement for these cards is FAT32.
  • SD eXtended Capacity: Based on the SDA 3.0 determination, capacities for SDXC run from 64 GB to 2 terabytes. The default organize for these cards is exFAT (Amplified FAT). SD Input Yield.
  • SDIO cards combine I/O capacities with information capacity. As of 2016, the winning designs are full or micro-size SDHC and SDXC cards.

What is MMC?

To begin with, Multimedia cards were disclosed in 1997 as a joint wander between SanDisk and Siemens. They utilized a surface contact low-pin interface that permitted less demanding get-to and information capacity than difficult drives. This innovation proved to be a vital portion of the improvement of solid-state drives.

Earlier interactive media cards used to have a capacity of 32 MB, but variations with more than 1 GB capacity were accessible by the late 2000s. The gaming industry invited the innovation wholeheartedly, with various video amusement comforts utilizing MMC cards in an extra capacity.

By the 2010s, producers such as Sony and Phillips had peripherals that utilized MMCs to extend their memory. As late as 2018, most portable workstations had MMC card spaces as standard.

If you've ever claimed a camcorder before buying smartphones with extraordinary cameras, then you will be recognizable with the tribulations of an MMC card. MMC card may be a streak memory used to store data within the frame of electrical signals. It was created in the 1990s. The MMC cleared the way for different advanced gadgets such as smartphone processors, SD cards, streak drives, solid-state drives, etc.

The normal MMC measurements are as that of a postage stamp: 24 mm x 32mm x 1.4 mm. It employs NOR-based streak innovation to store information, spearheaded by SanDisk, implying that the card can store data in the form of electrical signals instead of the attractive strategies utilized by ordinary optical disks.

The handle of putting away information permits for plentiful capacity for MMC cards despite their compact plan. Nowadays, you'll be able to get MMC cards with a capacity of holding up to 512 gigabytes. In addition, their need for information surface presentation makes them much tougher than SD cards. Most smartphones utilize implanted MMC for inner capacity.

The finest portion almost MMCs is that there's no copyright to create gadgets utilizing the innovation. You'll make your claim gadgets with MMCs on a printed circuit board. Numerous Android gadget producers do the same. The Snapdragon 820 processor employments an MMC for its processor sheets since it permits for speeds of up to 400 MB/s.

Usage of MMC:

Indeed for the current year, you'll be able to get an MMC card with a conventional capacity for a sensible cost. It ordinarily sees the applications mentioned below:

  • Storing photographs and recordings from more seasoned cameras and camcorders.
  • Backing up imperative OS records such as Windows recuperation and Mac Time Machine.
  • Utilizing as an inaccessible boot gadget for Linux.
  • Saving data for convenient gaming support just like the PSP and Nintendo Switch.
  • Securing delicate information absent from loT capacity administrations.

Main Differences Between SD and MMC in Points

  • SD cards presently have a holding capacity of up to 4 TB; MMC cards have a most extreme holding capacity of 32 MB.
  • SD card measurements are more often than not 32 mm x 24 mm x 2.1 mm; MMC card measurements are ordinarily 24mm x 32 mm x 1.4mm.
  • SD cards have an exchange rate of almost 10 – 20 MB per moment; MMC cards have an exchange of up to 8 MB per moment.
  • The SD interface could be a subset of the MMC interface.
  • SD has been able to examine MMC cards.
  • SD cards can not fit into MMC card slots
  • SD cards will not accomplish ideal speed in an MMC space and vice versa.
  • Even though they utilize the same innovation, a few highlights partitioned SD cards and MMC cards. Secure Computerized (SD) cards were presented in 1999 as an enhancement over MMCs. Nowadays, microSD cards are the foremost well-known implies of outside information capacity for versatile gadgets.
  • SD can be found in SD, miniSD, and microSD, while MMC can be found in MMC, RS-MMC, MMC Plus, and metal extenders.
  • SD card is utilized in versatile phones, while MMC is utilized in advanced cameras.


All the information stated above may assist you in getting the distinction between the MMC and SD Interface. Both interfaces are the capacity devices. The MMC contains a better exchange rate when compared to the SD, and it is the best option for exchanging the bigger records rapidly. You'll be able to utilize any sort of capacity gadget, but it is obligatory to require the reinforcement of your information to dodge the information erasure and debasement.

Whereas it may be more than two decades old, a multi-media card can still help you with information capacity for your versatile advanced gadgets. They are rough, natural, and more secure than IoT-based applications. We trust you learned more about what an MMC card is and how to recuperate information from one.

MMC cards are significantly more durable than SD cards since they do not uncover information to the surface. For inner capacity, the lion's share of smartphones utilizes inserted MMC (eMMC).

Data is put away utilizing NOR-based streak innovation, which SanDisk designed.

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"Difference Between SD and MMC." Diffzy.com, 2024. Fri. 19 Jul. 2024. <https://www.diffzy.com/article/difference-between-sd-and-mmc>.

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