The **RI-TRP-R9VS** is a high-quality Radio Frequency Identification (RFID) transponder manufactured by **Texas Instruments**. It belongs to the **TIRIS™** (Texas Instruments Registration and Identification System) family, specifically utilizing Low Frequency (LF) technology. --- ## 1. Core Technical Specifications The following table summarizes the key electronic characteristics of the RI-TRP-R9VS: | Parameter | Specification | | :--- | :--- | | **Frequency** | 134.2 kHz | | **Type** | Read-Only (RO) | | **Technology** | Frequency Shift Keying (FSK) | | **Memory Capacity** | 64 bits | | **Format** | Minitransponder (Glass Encapsulated) | | **Dimensions** | 2.12 mm x 12 mm | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Electronic Components & Design ### Glass Encapsulation The internal electronic assembly is housed in a hermetically sealed **biocompatible glass tube**. This provides: * **Protection:** High resistance to moisture, chemicals, and mechanical stress. * **Versatility:** Allows for embedding in plastic, wood, or even medical/biological environments. ### The Integrated Circuit (IC) The internal chip is a passive device, meaning it contains **no battery**. * **Power Harvesting:** It derives its power from the electromagnetic field generated by the RFID reader. * **Resonance Loop:** It contains an internal copper wire coil (antenna) and a capacitor that forms a resonant circuit tuned to 134.2 kHz. ### Communication Protocol * **Half Duplex (HDX):** The transponder receives energy first, stores it in an internal capacitor, and then transmits its data after the reader’s signal stops. * **FSK Modulation:** It uses two different frequencies (134.2 kHz for binary '0' and 124.2 kHz for binary '1') to send data back to the reader, ensuring high noise immunity. --- ## 3. Applications Due to its small form factor and "Read-Only" nature (each chip has a unique, factory-programmed ID), it is commonly used in: * **Asset Tracking:** Marking small tools or industrial components. * **Vehicle Immobilizers:** Used in car keys for security authentication. * **Access Control:** Embedded in key fobs or security badges. * **Waste Management:** Tracking bins and logistics. --- ## 4. Operational Diagram ```mermaid graph LR A[RFID Reader] -- "134.2 kHz Field" --> B[RI-TRP-R9VS] B -- "Internal Capacitor Charges" --> C[Internal Logic] C -- "FSK Signal (64-bit ID)" --> A ```