### ADG3243BRJ-R2: Overview and Technical Specifications The **ADG3243BRJ-R2** is a high-performance bus switch manufactured by Analog Devices. It is specifically designed as a 2-bit, 2.5 V or 3.3 V digital switch with low propagation delay, commonly used for level translation and bus isolation. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Type** | 2-Bit Bus Switch | | **Supply Voltage ($V_{CC}$)** | 2.3 V to 3.6 V | | **On-Resistance ($R_{ON}$)** | 8 $\Omega$ (Typical) | | **Propagation Delay** | 150 ps (Max) | | **Package Type** | SOT-23 (6-lead) | | **Operating Temperature** | -40°C to +85°C | | **Control Logic** | LVTTL Compatible | --- ### 2. Functional Features * **Low Propagation Delay:** Because it functions as a simple NMOS switch, it introduces minimal delay (less than 150 picoseconds), making it ideal for high-speed signal paths. * **Voltage Level Translation:** It can be used to interface between different logic levels (e.g., translating between 3.3 V and 2.5 V systems). * **Zero Wait State:** The switch operates without adding clock cycle delays, which is critical for synchronous bus communication. * **Hot Swap Support:** The device is designed to handle "live insertion" scenarios where boards are plugged into a powered backplane. --- ### 3. Pin Configuration & Internal Logic The device typically features the following pinout structure in the SOT-23 package: ```text Pin 1: B1 (Port 1) Pin 2: GND (Ground) Pin 3: A1 (Port 1) Pin 4: A2 (Port 2) Pin 5: BE (Bus Enable - Active Low) Pin 6: VCC (Supply Voltage) ``` **Logic Truth Table:** | BE (Bus Enable) | State | Connection | | :--- | :--- | :--- | | **L** (Low) | ON | A Port = B Port | | **H** (High) | OFF | High Impedance (Disconnect) | --- ### 4. Common Applications 1. **Bus Isolation:** Separating a heavily loaded bus into smaller segments to improve signal integrity. 2. **Mixed Voltage Systems:** Connecting a 3.3V CPU to 2.5V peripherals without damaging sensitive inputs. 3. **Memory Interfacing:** Facilitating data transfer between memory modules and controllers in high-speed servers. 4. **Signal Gating:** Enabling or disabling specific signal paths in complex FPGA or Microcontroller designs. ---