+-15kV ESD protected, 5V, low power, high speed and slew rate limited, full duplex, RS-485/RS-422 transceiver. The ISL8491EIB is a single-supply RS-485/RS-422 transceiver manufactured by **INTERSIL**. Below are its key specifications, descriptions, and features based on available data:

### **Specifications:**  
- **Supply Voltage (VCC):** +3.3V or +5V  
- **Data Rate:** Up to **250kbps**  
- **Operating Temperature Range:** **-40°C to +85°C**  
- **Number of Drivers/Receivers:** **1 Driver, 1 Receiver**  
- **Half-Duplex Communication**  
- **ESD Protection:** **±15kV (Human Body Model)**  
- **Low Power Consumption:**  
  - **Supply Current (Quiescent):** **300µA (Typical)**  
  - **Shutdown Current:** **0.1µA (Max)**  
- **Package:** **8-Lead SOIC (ISL8491EIB)**  

### **Descriptions:**  
- Designed for **RS-485/RS-422** communication networks.  
- Operates from a **single power supply** (+3.3V or +5V).  
- Supports **half-duplex** communication.  
- Features **thermal shutdown** and **short-circuit protection**.  
- **Enhanced ESD protection** for robustness in industrial environments.  

### **Features:**  
- **Single +3.3V or +5V Supply Operation**  
- **Low Power Consumption** (Suitable for battery-powered applications)  
- **1/8 Unit Load (Allows up to 256 devices on the bus)**  
- **Hot-Swap Inputs (Prevents false transitions during power-up/down)**  
- **Driver Output Short-Circuit Protection**  
- **Receiver Open-Circuit Fail-Safe**  
- **Thermal Shutdown Protection**  

The ISL8491EIB is commonly used in **industrial control, instrumentation, and point-of-sale systems** due to its reliability and low-power operation.  

*(Note: Always refer to the official datasheet for the most accurate and detailed specifications.)*

+-15kV ESD protected, 5V, low power, high speed and slew rate limited, full duplex, RS-485/RS-422 transceiver.