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SD card: Standards & History

The SD card is a proprietary, non-volatile, flash memory card format developed by the SD Association (SDA). They come in three physical forms: the full-size SD, the smaller miniSD (now obsolete), and the smallest, microSD. Owing to their compact form factor, SD cards have been widely adopted in a variety of portable consumer electronics, including…

Language: English [EN]
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SD card topic overview

The analysis highlights Standards and History as prominent areas in the source structure around SD card.

Related topics
155
Source areas
10
Connected nodes
165
Extracted relationships
261
Concept neighborhoods
26
Bridge connections
165

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 43 topics
Features · 29 topics
Markets · 21 topics
History · 20 topics
Bus marks · 10 topics
Capacity standards · 10 topics
Card speed class ratings · 6 topics
Performance ratings · 6 topics
Openness of specification · 5 topics
Technical details · 5 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Block size
Variable
Capacity
SD: Up to 2 GB · SDHC: Up to 32 GB · SDXC: Up to 2 TB · SDUC: Up to 128 TB
Developed by
SD Association
Dimensions
Standard: 32×24×2.1 mm (1.260×0.945×0.083 in) · Mini: 21.5×20×1.4 mm (0.846×0.787×0.055 in) · Micro: 15×11×1 mm (0.591×0.433×0.039 in)
Extended from
MultiMediaCard
Media type
Memory card

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Capacity standards

Bus marks

Card speed class ratings

Performance ratings

Features

Markets

Technical details

Openness of specification

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How SD card connects Entity context

The extracted context around SD card shows recurring relationship patterns in the source. For example, SD card → ADATA, DRM, Gruvi, In, Integrated, Integrated USB, Integrated Wi-Fi, Pre-loaded, SanDisk, SD, Several, Some, Super Info SD, The, USB, Vendors, Wi-Fi Another extracted example is SD card → All SD, Cards, Four-bit SD, Once, One-bit SD, SD, SD UHS-II, Separate, Serial Peripheral Interface Bus, SPI, The SPI, This, Two, UHS-I, UHS-II, Uses. Use these groups to spot repeated connection types before inspecting the individual relationships.

SD card

Top relations

related to Vendor enhancements · 17
SD card → ADATA, DRM, Gruvi, In, Integrated, Integrated USB, Integrated Wi-Fi, Pre-loaded, SanDisk, SD, Several, Some, Super Info SD, The, USB, Vendors, Wi-Fi
related to Transfer modes · 16
SD card → All SD, Cards, Four-bit SD, Once, One-bit SD, SD, SD UHS-II, Separate, Serial Peripheral Interface Bus, SPI, The SPI, This, Two, UHS-I, UHS-II, Uses
related to Openness of specification · 14
SD card → As, August, Despite, DRM, Early, Like, NDA, Royalties, SD, SD Association, SDA, SDIO, The SD, US
related to Smaller formats · 13
SD card → At, CeBIT, However, In, March, SanDisk, SD, SDA, T-Flash, TF, The, The SD Association, TransFlash
related to smartSD cards · 13
SD card → Apple, Apple IPhone, Application Protocol Data Unit, CredenSE, DeviceFidelity, In2Pay, Inc, ISO, JavaCard, NFC, SD, Some, Visa
related to Increasing storage density · 12
SD card → Capacity, Consumer, GB, In January, MB/s, NAND, SD, SDA, SDXC, Secure Digital, TB, The
related to Embedded systems · 11
SD card → DD-WRT's Linux, GPIO, If, Linksys WRT54G-TM, Mb/s, Raspberry Pi, SD, SDIO, SPI, The, While
related to Power consumption · 11
SD card → During, Minimum, Modern UHS-II, SD, SDR104, Specifications, Standby, The, Toshiba, TwinMOS Technologies, UHS-II
related to SD (SDSC) · 11
SD card → Although, MMC, MMC's, Recessed, SD, SD Standard Capacity, SDSC, Secure Digital, The, These, Thin SD
related to Personal computers · 10
SD card → Although, ATA, However, In, Memory, Primary, SD, SD-to-CompactFlash, Tablet PCs, USB

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

sd cards card capacity sdhc microsd use devices support speed host sdxc bus device interface data memory specification transfer mb

SD card relationships Subject–Predicate–Object triples

TTTA extracted 261 structured relationships around SD card. Examples in this analysis include SD card → Block size → Variable and SD card → Capacity → SD: Up to 2 GB. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
SD cardBlock sizeVariable1.00infobox
SD cardCapacitySD: Up to 2 GB1.00infobox
SD cardCapacitySDHC: Up to 32 GB1.00infobox
SD cardCapacitySDXC: Up to 2 TB1.00infobox
SD cardCapacitySDUC: Up to 128 TB1.00infobox
SD cardDeveloped bySD Association1.00infobox
SD cardDimensionsStandard: 32×24×2.1 mm (1.260×0.945×0.083 in)1.00infobox
SD cardDimensionsMini: 21.5×20×1.4 mm (0.846×0.787×0.055 in)1.00infobox
SD cardDimensionsMicro: 15×11×1 mm (0.591×0.433×0.039 in)1.00infobox
SD cardExtended fromMultiMediaCard1.00infobox
SD cardMedia typeMemory card1.00infobox
SD cardRead mechanismDefault: Up to 12.5 MB/s1.00infobox
SD cardRead mechanismHigh-speed: Up to 25 MB/s1.00infobox
SD cardRead mechanismUHS-I: Up to 104 MB/s1.00infobox
SD cardRead mechanismUHS-II: Up to 312 MB/s1.00infobox
SD cardRead mechanismUHS-III: Up to 624 MB/s1.00infobox
SD cardRead mechanismExpress: Up to 3940 MB/s1.00infobox
SD cardReleasedAugust 19991.00infobox
SD cardWeightStandard: 2 g (0.071 oz)1.00infobox
SD cardWeightMini: 0.8 g (0.028 oz)1.00infobox
SD cardWeightMicro: 0.25 g (0.0088 oz)1.00infobox
SD cardis aproprietary0.90text

Related concept clusters Concept neighborhoods

The concept neighborhoods around SD card bring nearby vocabulary together. In this analysis, examples include Sd, Memory and Specification. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • SD card
    • Sd
    • Memory
    • Specification
    • Bus
    • Host
    • Cards
    • Support
    • Interface
    • Microsd
    • Version
    • Devices
    • Device
  • sd card
    • Sd
    • Device
    • Host
    • Memory
    • Specification
    • Bus
    • Cards
    • Support
    • Interface
    • Microsd
    • Write
    • Version
  • flash memory
    • Storage
    • Also
    • Sdhc
    • Capacity
    • Sd
    • Format
    • Performance
    • Digital
    • Cards
    • Data
    • Sandisk
    • Read
  • sd association
    • Specification
    • Bus
    • Host
    • Support
    • Interface
    • Version
    • Devices
    • Device
    • Storage
    • Transfer
    • Mode
    • Sdhc
  • digital cameras
    • Format
    • Introduced
    • Storage
    • Memory
    • Sandisk
    • Capacity
    • Devices
    • Mb
    • Sd
    • Transfer
    • Specification
    • Data
  • digital rights management
    • Format
    • Introduced
    • Storage
    • Memory
    • Sandisk
    • Capacity
    • Devices
    • Mb
    • Sd
    • Transfer
    • Specification
    • Data
  • double data rate
    • Transfer
    • Mode
    • Speed
    • Read
    • Performance
    • Device
    • Write
    • Sdhc
    • Host
    • Speeds
    • Used
    • Mb
  • miniature card
    • Sd
    • Device
    • Host
    • Memory
    • Bus
    • Cards
    • Interface
    • Microsd
    • Write
    • Read
    • Data
    • Speed

Connections between topic areas Semantic bridges

For SD card, one of the stronger structural bridges in this analysis connects SD card with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
SD card — Overview · splits 122 ⟂ 44
SD card — Features · splits 136 ⟂ 30
SD card — Markets · splits 144 ⟂ 22
SD card — History · splits 145 ⟂ 21
SD card — Capacity standards · splits 155 ⟂ 11
SD card — Bus marks · splits 155 ⟂ 11
SD card — Card speed class ratings · splits 159 ⟂ 7
SD card — Performance ratings · splits 159 ⟂ 7
SD card — Technical details · splits 160 ⟂ 6
SD card — Openness of specification · splits 160 ⟂ 6

Map overview Semantic statistics

SD card

Nodes166
Edges165
Triples261
Avg. degree1.99
Density0.012048
Components1

Source & methodology

TTTA analyzes the structure around SD card to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Standards & History, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — SD card · EN edition · Analysis: TopicsToTalkAbout

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