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→‎Consumer details: Added reference about SD card write protect switch with link to SD card physical specification
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| [[Secure Digital|SD]]
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| {{yes}}<ref>Some early SD cards may not have a write protection switch.</ref><ref>The write protect switch signals to the host, which is responsible for write protection. The write protect switch is not connected to the internal circuitry of the card. [http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf SD Card Simplified Physical Layer Specification]</ref>
| {{yes}}<ref>Some early SD cards may not have a write protection switch</ref>
| rowspan="3" {{yes}}, [[CPRM]]
| rowspan="3" {{yes}}, [[CPRM]]
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Revision as of 20:12, 12 March 2010

This table provides summary of comparison of various flash memory cards, as of 2009.

Common information

unless otherwise indicated, all images to scale
Card family Standards organizations Varieties Entry date Picture[1] Major features
CompactFlash SanDisk I 1994 Thinner (3.3 mm), flash based only, sizes available up to 512MB
II Thicker (5.0 mm), older flash based, but usually Microdrives, sizes available up to 128 GB
SmartMedia Toshiba 3.3/5 V 1995 Very thin (45.0 × 37.0 × 0.76 mm thick), no wear levelling controller, sizes available up to 128 MiB
MultiMediaCard Siemens AG, SanDisk MMC 1997 Thin and small (24 mm × 32 mm × 1.4 mm), sizes available up to 4 GiB
RS-MMC/MMC Mobile 2003/2005 Compact size (24 mm × 18 mm × 1.4 mm), sizes available up to 2 GiB
MMCplus 2005 Compact size (24 mm × 32 mm × 1.4 mm), faster, optional DRM, sizes available up to 2  GiB
MMCmicro 2005 Sub compact size (14 mm × 12 mm × 1.1 mm), optional DRM, 16MB - 1GB
Secure Digital Panasonic, SanDisk, Toshiba, Kodak SD 1999 Small (32 mm × 24 mm × 2.1 mm), DRM, sizes available up to 2 GiB
miniSD 2003 Compact size (21.5 mm x 20 mm x 1.4 mm), DRM, available up to 2 GiB
microSD 2005 Sub compact size (11 mm x 15 mm x 1 mm), DRM, available up to 4 GiB[2]
SDHC 2006 Physically the same as SD, but offers higher capacity and transfer speed, available up to 64 GiB[3]
miniSDHC 2007 Physically the same as miniSD, but offers higher capacity and transfer speed, available up to 32 GiB
microSDHC 2007 Physically the same as microSD, but offers higher capacity and transfer speed, available up to 32 GiB[4]
Memory Stick Sony/SanDisk Standard 1998 Thin and narrow (50 mm x 21.5 mm x 2.8 mm), optional DRM, available up to 128 MiB
PRO 2003
(not to scale) 		Thin and narrow (50 mm x 21.5 mm x 2.8 mm), faster, optional DRM, Memory up to 4 GiB
Duo 2003 Compact size (31 mm x 20 mm x 1.6 mm), optional DRM, Memory up to 128 MiB
PRO Duo 2002-06 Compact size (31 mm x 20 mm x 1.6 mm), optional DRM, available up to 32 GiB
PRO-HG Duo 2007-08 Compact size (31 mm x 20 mm x 1.6 mm), faster , optional DRM, available up to 32 GiB
Micro (M2) 2006-02 Sub compact size (15 mm x 12.5 mm x 1.2 mm), optional DRM, available up to 16 GiB
xD Olympus, Fujifilm Standard 2002-07 Thin and small (20 mm × 25 mm × 1.78 mm), electrically identical to SmartMedia, no wear levelling controller, available up to 512 MiB[5]
Type M 2005 Thin and small (20 mm × 25 mm × 1.78 mm) but slower read/write, no wear levelling controller, available up to 2 GiB[5]
Type H 2005 Thin and small (20 mm × 25 mm × 1.78 mm) and faster than previous two versions, no wear levelling controller, available up to 2 GiB[5]
USB flash drive Various USB 1.1/2.0/3.0 2001
(not to scale) 		Universally compatible across all computer platforms, but larger size suits them better to file transfer/storage instead of use in portable devices, available up to 256 GiB

Physical details

Note that a memory card's dimensions are determined while holding the card with contact pins facing up. Horizontal measurement is width, vertical measurement is length, depth is thickness. For most cards length is larger than width, although this is not always the case. Also, most cards include a direction arrow to aid insertion; such an arrow should also be facing "up".

Card Width (mm) Length (mm) Thickness (mm) Volume (mm³) Mass (g)[6]
CompactFlash, Type I 43.0 36.0 3.3 5,108 3.3
CompactFlash, Type II 43.0 36.0 5.0 7,740
SmartMedia 37.0 45.0 0.76 1,265 2.0
MMC, MMCplus 24.0 32.0 1.4 1,075 1.3[7]
RS-MMC, MMCmobile 24.0 18.0 1.4 605 1.3
MMCmicro 14.0 12.0 1.1 185
Memory Stick Standard, PRO 21.5 50.0 2.8 3,010 4.0
Memory Stick Duo, PRO Duo, PRO-HG , XC 20.0 31.0 1.6 992 2.0
Memory Stick Micro (M2), XC 12.5 15.0 1.2 225 2.0
SD, SDxC 24.0 32.0 2.1 1,613 2.0
miniSD 20.0 21.5 1.4 602 1.0
microSD, microSDxC 11.0 15.0 1.0 165 0.27
xD 25.0 20.0 1.78 890 2.8
USB varies varies varies varies varies

Technical details

Card Varieties Actual max. storage capacity (mebibyte, or MiB) Theoretical max. capacity Max. Read Speed (MByte/s) Max. Write Speed (MByte/s) Read/write cycles Low-level access Operating voltage (V)[8] Controller chip[9] # of pins
CompactFlash I 65,536 128 GiB (137 GB; due to LBA-28) 133[10] 133[10] NOR/NAND 3.3 and 5 Yes 50
II 12,288 128 GiB (due to LBA-28) 133[10] 133[10]
SmartMedia 128 2 1,000,000 NAND 3.3 or 5 No 22
MMC MMC 8,192 128 GB 20 20 1,000,000[11] 3.3 Yes 7
RS-MMC 2,048 2[12] 2[12] 3.3 7
MMCmobile 2,048 15[13] 8[13] 1.8 and 3.3 13
MMCplus 4,096[14] 52[15] 52[15] 3.3 13
MMCmicro 2,048 1.8 and 3.3 13
eMMC 2 TiB 104 104 1.8 and 3.3 Yes 13
Memory Stick Standard 128 128 MiB 2.5 1.8 3.3 Yes 10
PRO 4,096 2 TiB 20 20 3.3
PRO Duo 32 ,000[16] 20 20 3.3
PRO-HG Duo 16, 000[17] Actual: 30[18]
Theoretical: 60[19] 		Actual: 30[18]
Theoretical: 60[19] 		3.3
Micro (M2) 16,384[20] 32 GiB 20 20 1.8 and 3.3
xC 2 TiB 60 60 3.3 Yes 10
Secure Digital SD 4 GiB 12.5/25(HS) 12.5/25(HS) 3.3 Yes 9
miniSD 8,192 12 12 11
microSD 4,096 10 10 8
SDHC 32,768[21] 2 TiB 12.5/25(HS) 12.5/25(HS) 3.3 Yes 9
miniSDHC 4,096[22] 12 12 11
microSDHC 16,384[23] 10 10 8
SDXC 2,097,152 2 TiB 104 104 3.3 Yes 9
xD 512 512 MiB 5 3 3.3 No 18
Type M 2,048 8 GiB 4 2.5
Type H 2,048 8 GiB 5 4
Type M+ 2,048 8 GiB 6 3.75
USB Full speed 131,072 (2009) 262,144 (2010) No Limit 1 1 5 Yes 4
High speed 40 40

Consumer details

Card Write protection switch[24] DRM
CompactFlash No No
SmartMedia Partial, sticker Partial (optional)
MMC, RS-MMC No No
MMCMobile Yes, secureMMC
Memory Stick Standard, PRO Yes Optional, MagicGate
Memory Stick Duo, PRO Duo No Optional, MagicGate
Memory Stick PRO-HG Duo No Optional, MagicGate
Memory Stick Micro (M2) No Optional, MagicGate
SD Yes[25][26] Yes, CPRM
miniSD No
microSD No
xD Partial, sticker Partial [27]
USB Sometimes No

Compatibility

The following chart gives details on availability of adapters to put a given card (horizontal) in a given slot or device (vertical). This table does not take into account protocol issues in communicating with the device.

Following labels are used:

  • + (native) - a slot is native for such card.
  • D (Directly compatible) - a card may be used in such a slot directly, without any adapters. Best possible compatibility.
  • M (requires a Mechanical adapter) - such adapter is only a physical enclosure to fit one card sized into another; all electrical pins are exactly the same.
  • EM (requires an Electro-Mechanical adapter) - such adapter features both physical enclosure and pins re-routing as terminals are sufficiently different. No powered elements in such adapter exists, thus they're very cheap and easy to manufacture and may be supplied as a bonus for every such card.
  • E (requires an Electronic adapter enclosure) - these adapters are the most advanced ones with some chips (may be requiring external power) that transform signals, as well as physical enclosure and pin routing.
  • X (requires an eXternal adapter) - technically the same as E, but such adapter usually consists of 2 parts: a pseudo-card with pin routing and physical enclosure size that perfectly match the target slot and a break-out box (a card reader) that holds a real card. Such adapter is the least comfortable to use.
  • Empty cell - card can't be used in such slot, no single adapter is known to exist. Sometimes a chain of adapters can help (for example, miniSD→CF as miniSD→SD→CF)
Cards → CF SM MMC Memory Stick SD xD
↓ Slots I II MMC RS-MMC, MMCmobile Std PRO PRO Duo Micro SD mini micro Std M H
ExpressCard E[28] E[28] E[29] E[30] E[30] E[29] E[29] E[29] E[31] E[29] E[29] E[29]
PC card EM[32] EM[32] E[33] E[34] E[34] E[34] E[34]
CF I + E E[35] E[36] E[36] E[37] E[35] E[38] E[38] E[38]
CF II + + E E[35] E[36] E[36] E[35] E[38] E[38] E[38]
SM + X[39] X[39] X[39]
xD E[40] + + +
MMC + M D[41]
MS X[42] + + M M X[42] X[42] E[43]
SD D M + EM EM
IDE PATA EM[44] EM[44] E[45][46]
Serial ATA E[47] E[47]
USB X[48] X[48] X[48] X[48] X[48] X[48] E[49] E[49] E[50] E[51] X[48] X[48] X[48]
Floppy E[52]
Nintendo DS Slot-1 E[53]
Nintendo DS Slot-2 E[54] E[54] E[54]

References

  1. ^ Pictures are given in relative scales; they're sized to be WYSIWYG when viewing using 81 PPI monitor.
  2. ^ SanDisk microSD and microSDHC Product Listing
  3. ^ [1]
  4. ^ [2]
  5. ^ a b c FUJIFILM Global | xD-Picture Card and Adapters
  6. ^ Plexus Outbursts specifications
  7. ^ Apacer's MMC specifications
  8. ^ Voltage table at All Memory Cards, note that some cards support both voltages (and), and some cards are available in distinct versions (or)
  9. ^ Explanation of controller chip at All Memory Cards
  10. ^ a b c d CompactFlash Specification Rev. 4.1
  11. ^ ACP-EP Specifications
  12. ^ a b ACP-EP RS-MMC card features list
  13. ^ a b ACP-EP MMCmobile card features list
  14. ^ Transcend MMCplus 4 GiB
  15. ^ a b MMC transferred at up to 52 MiB/s
  16. ^ Sony 32 GB Memory Stick PRO Duo
  17. ^ [3]
  18. ^ a b Sony Introduces Faster MS Pro HG Duo Card
  19. ^ a b Sony Memory Stick PRO-HG, up to 32 GB, 8-bit parallel transfer
  20. ^ SanDisk announces world's largest mobile phone card capacity with 16GB M2
  21. ^ Toshiba Adds New High Density SDHC Cards and microSDHC Card to Extensive Memory Card Line-up
  22. ^ New 4 GiB miniSDHC card
  23. ^ SanDisk announces world's largest mobile phone card capacity with 16 GiB Micro SHDC
  24. ^ Write protection switch at All Memory Cards
  25. ^ Some early SD cards may not have a write protection switch.
  26. ^ The write protect switch signals to the host, which is responsible for write protection. The write protect switch is not connected to the internal circuitry of the card. SD Card Simplified Physical Layer Specification
  27. ^ Fujifilm accessories xD-Picture Card
  28. ^ a b DataFab EXP-CF
  29. ^ a b c d e f g DataFab EXP 12 in 2
  30. ^ a b DataFab exp 12 in 1
  31. ^ DataFab exp M2+microSD
  32. ^ a b Transcend CompactFlash-to-PC Card adapter
  33. ^ Transcend SmartMedia-to-PC Card adapter
  34. ^ a b c d Transcend 5-in-1 Adapter
  35. ^ a b c d Minolta SD-CF1 SD-to-CompactFlash adapter
  36. ^ a b c d Transcend MemoryStick-to-CompactFlash adapter
  37. ^ Sony MSAC-MCF1N and AD-MSCF1 PRO Duo to CF adapters
  38. ^ a b c d e f Olympus MACF-10 xD-to-CompactFlash adapter
  39. ^ a b c Hama xD-to-SM adapter
  40. ^ In March 2008, Olympus started shipping the MASD-1 microSD-to-xD adapter along with its latest compact digital cameras, with a shape designed to fit only in those latest cameras. The physical adapter is in fact purely electromechanical, although the xD and SD protocols are completely incompatible. This demonstrates that the cameras themselves must understand the SD protocol, and thus the adapter is more properly termed an electronic adapter, with the electronic logic contained in the camera rather than the physical accessory.
  41. ^ SD cards are usually thicker than MMC ones, and although it uses perfectly compatible pins, not every MMC slot may allow thick SD card to be inserted
  42. ^ a b c Dragon SD/miniSD/MMC to MS PRO Duo Adapter
  43. ^ KingMax microSD to MS PRO Duo Adapter
  44. ^ a b PC Engines IDE to CompactFlash adapters
  45. ^ Star Empery PT110 SD Card To ATA IDE 3.5 inch Hard Drive Adapter
  46. ^ 4× SD to SSD IDE Adapter
  47. ^ a b Accelerated Compact Flash: The Addonics SATA CF Adapter
  48. ^ a b c d e f g h i There are many USB-connected "n-in-1" memory card readers, for example Belkin's "Hi-Speed USB 2.0 15-in-1 Media Reader & Writer".
  49. ^ a b MS Duo and M2 adapters have appeared in the last 12 months which look like USB memory sticks
  50. ^ SanDisk @ CES - SD card with built-in USB adapter
  51. ^ A-Data microSD to USB Adapter
  52. ^ DCRP Special Report: FlashPath Adapter by Tom Beardmore
  53. ^ R4 microSD to NDS Slot-1 Adapter
  54. ^ a b c Supercard to NDS Slot-2 Adapter

External links

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