The **M93C46-RDS3TG/S** is a specific variant of the 1Kbit Serial Microwire EEPROM manufactured by **STMicroelectronics**. This component is widely used for non-volatile storage of configuration data, IDs, and calibration parameters in embedded systems. --- ## 1. Technical Specifications The part number suffix provides specific details about its packaging, voltage range, and temperature ratings. | Parameter | Specification | | :--- | :--- | | **Memory Size** | 1 Kbit (128 x 8 bits or 64 x 16 bits) | | **Interface** | Microwire (3-Wire Serial) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 2 MHz (at 4.5V) / 1 MHz (at 1.8V) | | **Package Type** | TSSOP8 (Thin Shrink Small Outline Package) | | **Temperature Range** | -40°C to +125°C (Automotive Grade 3) | | **Write Cycles** | 4 million write cycles | | **Data Retention** | 200 Years | --- ## 2. Key Features * **User-Selectable Internal Organization:** By using the ORG pin, the memory can be configured as either 8-bit bytes or 16-bit words. * **Sequential Read:** Allows reading the entire memory contents in a single continuous stream. * **Write Protection:** Includes a Write Enable/Disable instruction to prevent accidental data corruption. * **Ready/Busy Signal:** During a write cycle, the Data Out (DO) pin acts as a status indicator to notify the microcontroller when the internal write cycle is complete. --- ## 3. Pinout Configuration (TSSOP8) The device follows the standard Microwire pinout for 8-pin packages: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **S (CS)** | Chip Select | | 2 | **C (SK)** | Serial Clock | | 3 | **D (DI)** | Serial Data Input | | 4 | **Q (DO)** | Serial Data Output | | 5 | **Vss** | Ground | | 6 | **ORG** | Organization Select (High for x16, Low for x8) | | 7 | **DU/NC** | Don't Use / No Connection | | 8 | **Vcc** | Supply Voltage | --- ## 4. Part Number Breakdown The suffix `RDS3TG/S` identifies the specific environmental and production standards: * **R:** 1.8V to 5.5V operating range. * **DS:** TSSOP8 package (3x4.4mm body). * **3:** Device tested for high-temperature range (-40°C to 125°C). * **TG:** Tape & Reel packaging. * **S:** Indicates a specific "Silver" or high-reliability process flow often used for automotive or industrial consistency. ---