The **SDTM-620-RTR** is a specific type of electronic connector, primarily categorized as a **Micro SD Card Connector**. These components are essential for devices requiring expandable memory or data storage, such as smartphones, IoT devices, and embedded systems. Below is a detailed breakdown of its electronic and mechanical specifications. --- ## 1. Technical Specifications The "RTR" suffix typically indicates **Reverse Type** and **Tape & Reel** packaging. | Feature | Specification | | :--- | :--- | | **Component Type** | Micro SD (TF) Card Slot | | **Mounting Type** | Surface Mount (SMT) | | **Orientation** | Right Angle / Reverse Type | | **Card Insertion Style** | Push-Push (Click-in, Click-out) | | **Number of Contacts** | 8 Pins + Switch/GND pins | | **Pitch** | 1.10 mm | | **Packaging** | Tape & Reel (For automated SMT assembly) | --- ## 2. Key Electronic Characteristics These parts are designed to maintain high signal integrity for high-speed data transfer (UHS-I compatible). * **Current Rating:** Typically 0.5A per pin. * **Voltage Rating:** 10V - 100V AC/DC. * **Contact Resistance:** Usually <100 mΩ to ensure stable data reading. * **Insulation Resistance:** >1000 MΩ at 500V DC. * **Dielectric Withstanding Voltage:** 500V AC for 1 minute. --- ## 3. Physical & Material Construction The SDTM-620 series is built to survive the high temperatures of reflow soldering. ### Material Composition * **Housing:** High-temperature Thermoplastic (LCP - Liquid Crystal Polymer), UL94V-0 rated. * **Contacts:** Copper Alloy with Gold plating (to prevent oxidation and ensure conductivity). * **Shell:** Stainless Steel or Copper Alloy with Nickel/Tin plating for EMI shielding and structural durability. ### Mechanical Durability * **Mating Cycles:** Rated for approximately 5,000 to 10,000 insertion/extraction cycles. * **Ejection Mechanism:** The "Push-Push" mechanism utilizes an internal spring and hook system to lock and release the card safely. --- ## 4. Pin Configuration (Typical Micro SD) While the SDTM-620-RTR provides the physical interface, the pins correspond to the standard SD interface: | Pin # | Name | Description | | :--- | :--- | :--- | | 1 | DAT2 | Data Line 2 | | 2 | CD/DAT3 | Card Detect / Data Line 3 | | 3 | CMD | Command / Response | | 4 | VDD | Supply Voltage (2.7V - 3.6V) | | 5 | CLK | Clock Signal | | 6 | VSS | Supply Voltage Ground | | 7 | DAT0 | Data Line 0 | | 8 | DAT1 | Data Line 1 | ---