## Overview of the M93C46-RDS6 The **M93C46-RDS6** is a 1-Kbit (1024-bit) low-voltage serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It is commonly used in automotive and industrial applications for non-volatile data storage. ### 1. Key Technical Specifications | 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 - 5.5V) | | **Package Type** | TSSOP8 (8-lead Thin Shrink Small Outline Package) | | **Temperature Range** | -40°C to +85°C (Industrial Grade) | | **Write Cycles** | More than 1,000,000 cycles | | **Data Retention** | 40 Years | --- ### 2. Pin Configuration (TSSOP8) The device features 8 pins, each serving a specific role in the MICROWIRE communication protocol: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **S** | Chip Select (Active High) | | 2 | **C** | Serial Clock | | 3 | **D** | Serial Data Input | | 4 | **Q** | Serial Data Output | | 5 | **Vss** | Ground | | 6 | **ORG** | Organization Select (x8 or x16 mode) | | 7 | **DU** | Don't Use (Must be connected to Vss or left floating) | | 8 | **Vcc** | Supply Voltage | --- ### 3. Core Features and Operation #### Organization Modes The **ORG** pin determines how the memory is addressed: * **High (Vcc):** Organized as 64 words of 16 bits each. * **Low (Vss):** Organized as 128 words of 8 bits each. #### Instruction Set The M93C46 operates via a set of standard instructions sent through the **D** pin: * **READ:** Read data from memory. * **WEN (Write Enable):** Must be sent before any write/erase operation. * **WRITE:** Write data to a specific address. * **ERASE:** Set bits at a specific address to '1'. * **WDS (Write Disable):** Protects data from accidental modification. --- ### 4. Part Number Breakdown: `M93C46-RDS6` Understanding the suffix is critical for procurement and PCB design: * **M93C46:** Base Part Number (1 Kbit Microwire EEPROM). * **-R:** Operating Voltage (1.8V to 5.5V). * **DS:** Package type (TSSOP8, 169 mil width). * **6:** Temperature range (-40°C to +85°C). --- ### 5. Application Circuits Typically, this chip requires a pull-up resistor on the **Q** (Data Out) line if the microcontroller uses an open-drain configuration, and a 0.1µF decoupling capacitor between **Vcc** and **Vss** to filter power supply noise.