A detailed guide to the pin configuration and function of standard SIM cards (including mini, micro, and nano variants). Sim Card ┌─────────────┐ │ 1 5 │ │ 2 6 │ │ 3 7 │ │ 4 8 │ └─────────────┘ Connector at the card Pin Configuration & Description Pin Description 1 [VCC] +5V or 3.3V DC power supply input Provides operating voltage to the SIM chip. 2 [RESET] Card reset, used to reset the card's communications (optional) Sends a reset signal to restart communication protocol. 3 [CLOCK] Card clock Synchronizes data transfer between the mobile device and SIM card. 4 [RESERVED] AUX1, optionally used for USB interfaces and other uses Not used in standard GSM/UMTS/LTE SIMs; reserved for future or specialized applications. 5 [GND] Ground Common ground reference for all signals. 6 [VPP] +21V DC programming voltage input (optional) Used during manufacturing to program the SIM chip; not active in normal operation. 7 [I/O] Input or Output for serial data (half-duplex) Bidirectional data line for exchanging information between the phone and SIM. 8 [RESERVED] AUX2, optionally used for USB interfaces and other uses Reserved for future use or special applications such as smart card emulation.

Complete Guide to USB 2.0, 3.0, and 3.1 (USB-C) Connectors "Comprehensive pinout diagrams and technical descriptions for all major USB connector types, including Standard-A, B, Mini, Micro, and USB-C." This web-based reference provides a detailed breakdown of USB connector pin configurations , signal functions, voltage levels, and color coding across generations: USB 2.0, USB 3.0, and USB 3.1 (Type-C) . All information follows official specifications from the USB Implementers Forum (USB-IF) . Ideal for engineers, technicians, hobbyists, and students working with embedded systems, DIY electronics, or device repair. What Is USB? Universal Serial Bus (USB) is a standardized interface for connecting peripherals to computers and mobile devices. It supports: Data transfer Power delivery (up to 240W in USB PD) Device charging Hot-swapping Each USB version introduces new features: USB 2.0 : Up to 480 Mbps USB 3.0 : Up to 5 Gbps USB 3.1 Gen 2 : Up to 10 Gbps USB 3.2 / USB4 : Up to 40 Gbps The physical connectors vary by type and generation, but all follow strict pin assignments. USB Connector Types Overview Connector Pins Use Case USB 2.0 A/B 4 pins Hosts, printers, keyboards Mini/Micro USB 2.0 5 pins Older phones, cameras USB 3.0 A/B 9/11 pins High-speed data, external drives Micro USB 3.0 10 pins Smartphones, tablets USB 3.1 C (USB-C) 24 pins Reversible, high-power, fast data Note: USB-C supports reversibility , dual-role operation , and Power Delivery (PD) . USB 2.0 – Standard A & B Connectors Standard A: Standard B: ┌─────────┐ ┌─────────┐ │ 4 3 2 1 │ │ 1 2 │ └─────────┘ └─────────┘ ↑ ↑ Plug View Plug View Pin Configuration (4-Pin) Pin Signal Color Code Function 1 VCC (+5V) Red Power supply (up to 500mA) 2 Data - (D-) White Differential data pair (-) 3 Data + (D+) Green Differential data pair (+) 4 Ground Black Signal and power return Full-duplex communication using differential signaling No ESD protection on host side? Use TVS diodes! Mini/Micro USB 2.0 – Standard A & B Standard A: Standard B: ┌───────┐ ┌───────┐ │ 1 2 3 4 5 │ │ 1 2 3 4 5 │ └───────┘ └───────┘ Pin Configuration (5-Pin) Pin Signal Function 1 VCC (+5V) Power supply 2 Data - (D-) USB 2.0 data negative 3 Data + (D+) USB 2.0 data positive 4 None Host detection: connected to ground in hosts, open in devices 5 Ground Common ground Pin 4 enables automatic detection of host vs. slave Used in older smartphones, GPS units, and digital cameras USB 3.0 – Standard A & B Connectors USB 3.0 A (9-Pin) Plug View: ┌─────────────┐ │ 5 6 7 8 9 │ │ 4 3 2 1 │ └─────────────┘ Pin Signal Function 1 VCC (+5V) Power supply 2 D- USB 2.0 data negative 3 D+ USB 2.0 data positive 4 GND Power ground 5 RX2- USB 3.0 receive line (-) 6 RX2+ USB 3.0 receive line (+) 7 GND Signal ground 8 TX2- USB 3.0 transmit line (-) 9 TX2+ USB 3.0 transmit line (+) Backward compatible with USB 2.0 Speed: Up to 5 Gbps (SuperSpeed) USB 3.0 B (11-Pin) Plug View: ┌─────────────┐ │ 9 8 7 6 5 │ │ 10 11 │ │ 4 3 │ └─────────────┘ Pin Signal Function 1 VCC (+5V) Power supply 2 D- USB 2.0 data negative 3 D+ USB 2.0 data positive 4 GND Power ground 5 TX2- USB 3.0 transmit line (-) 6 TX2+ USB 3.0 transmit line (+) 7 GND Signal ground 8 RX2- USB 3.0 receive line (-) 9 RX2+ USB 3.0 receive line (+) 10 DPWR Power provided by device (e.g., bus-powered hub) 11 GND Return for DPWR Rarely used; replaced by USB-C in modern devices Micro USB 3.0 (10-Pin) Plug View: ┌─────────────────────┐ │ 1 0 9 8 7 6 │ │ 5 4 3 2 1 │ └─────────────────────┘ Pin Signal Function 1 VCC (+5V) Power supply 2 D- USB 2.0 data negative 3 D+ USB 2.0 data positive 4 ID OTG identification (host/device role) 5 GND Power ground 6 TX2- USB 3.0 transmit line (-) 7 TX2+ USB 3.0 transmit line (+) 8 GND Signal ground 9 RX2- USB 3.0 receive line (-) 10 RX2+ USB 3.0 receive line (+) Used in early smartphones and tablets before USB-C adoption Supports On-The-Go (OTG) mode USB 3.1 Type-C (24-Pin) – Reversible Connector Plug View (Top Side): ┌────────────────────────────┐ │ 1 2 3 4 5 6 7 8 9 10 11 12 │ └────────────────────────────┘ │ 13 14 15 16 17 18 19 20 21 22 23 24 │ └────────────────────────────┘ Pin Configuration (24-Pin) Pin Signal Function 1 GND (A1) Ground 2 TX1+ (A2) SuperSpeed transmit (+) 3 TX1- (A3) SuperSpeed transmit (-) 4 Vbus (A4) +5V power supply 5 CC1 (A5) Configuration Channel (detects orientation, power roles) 6 D+ (A6) USB 2.0 data positive 7 D- (A7) USB 2.0 data negative 8 SBU1 (A8) Sideband use (for video/audio, alternate modes) 9 Vbus (A9) +5V power supply (second path) 10 RX2- (A10) SuperSpeed receive (-) 11 RX2+ (A11) SuperSpeed receive (+) 12 GND (A12) Ground 13 GND (B12) Ground (symmetric side) 14 RX1+ (B11) SuperSpeed receive (+) 15 RX1- (B10) SuperSpeed receive (-) 16 Vbus (B9) +5V power supply 17 SBU2 (B8) Sideband use 18 D- (B7) USB 2.0 data negative 19 D+ (B6) USB 2.0 data positive 20 CC2 (B5) Configuration Channel (backup) 21 Vbus (B4) +5V power supply 22 TX2- (B3) SuperSpeed transmit (-) 23 TX2+ (B2) SuperSpeed transmit (+) 24 GND (B1) Ground Fully reversible plug Dual-role data flow (host/device) Supports USB Power Delivery (up to 240W) Supports DisplayPort and HDMI via Alternate Mode Design Tips for Engineers Always route D+/D- as differential pairs with controlled impedance (~90Ω) Keep Vbus trace short and wide for better current handling Use TVS diodes on D+/D- lines for ESD protection Add pull-up resistors on CC pins for proper negotiation Follow USB-IF compliance guidelines for certification Standards Compliance USB 2.0 : USB-IF Specification 2.0 USB 3.0 : USB 3.0 Specification (Rev. 1.0) USB 3.1 : USB 3.1 Specification (Rev. 1.0) USB-C : USB Type-C Specification (Rev. 2.1) All modern devices must comply with these standards for interoperability.

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36S1000K-CC oil immersed distribution transformer pricing calculator is a costing budgeting calculator for capacity not exceed than 1000kVA, and rated voltage not exceed 36kV level, full copper winding oil filled distribution transformer price calculation. all design is complied with IEC60076 standard.