## Technical Overview of the M93C74-RDS6 The **M93C74-RDS6** is a 16-Kbit (8,192-bit) low-voltage Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It is primarily used for storing configuration data, calibration parameters, and user settings in various electronic devices. --- ### 1. Key Technical Specifications | Parameter | Description | | :--- | :--- | | **Memory Size** | 16 Kbit (8192 bits) | | **Organization** | Configurable: 2048 x 8 bits or 1024 x 16 bits | | **Interface** | MICROWIRE (3-wire serial) | | **Supply Voltage** | 1.8V to 5.5V | | **Clock Frequency** | Up to 2 MHz | | **Package Type** | TSSOP8 (8-lead Thin Shrink Small Outline Package) | | **Temperature Range** | -40°C to +85°C (Industrial Grade) | | **Write Cycles** | 1,000,000 (1 Million) erase/write cycles | | **Data Retention** | 40 Years | --- ### 2. Pin Configuration (TSSOP8) The device features 8 pins, each serving a specific function for serial communication and power. | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **S** | Chip Select (High to enable) | | 2 | **C** | Serial Clock | | 3 | **D** | Serial Data Input | | 4 | **Q** | Serial Data Output | | 5 | **Vss** | Ground | | 6 | **ORG** | Internal Organization (Selects x8 or x16 mode) | | 7 | **DU** | Don't Use (Must be connected to Vss or Vcc) | | 8 | **Vcc** | Supply Voltage | --- ### 3. Core Functional Features * **MICROWIRE Interface:** A synchronous serial communication protocol. It utilizes a chip select, a clock, and separate data-in/data-out lines. * **Organization Select (ORG Pin):** * If tied to **Vcc**, the memory is organized as **1024 words of 16 bits**. * If tied to **Vss**, the memory is organized as **2048 bytes of 8 bits**. * **Self-Timed Programming:** The device handles the internal erase and write timing automatically, reducing the burden on the host microcontroller. * **Write Protection:** The device includes specific instructions (WEN - Write Enable) that must be sent before any data can be modified, preventing accidental data loss during power fluctuations. --- ### 4. Part Number Breakdown Understanding the suffix **"RDS6"**: * **M93C74:** Base model family (16 Kbit Microwire EEPROM). * **-R:** Operating Voltage range (1.8V to 5.5V). * **DS:** Refers to the TSSOP8 package (3mm width). * **6:** Industrial temperature range (-40°C to +85°C). --- ### 5. Application Examples * **Consumer Electronics:** Storing TV channel presets or user preferences. * **Industrial:** Storing calibration data for sensors and modules. * **Automotive:** Odometer data or airbag deployment logs (in non-safety critical paths). * **Networking:** MAC addresses and configuration settings for routers and switches.