QFN Packaged/ +/-15kV ESD Protected/ +2.7V to +5.5V/ 150Nanoamp/ 250kBps/ RS-232 Transmitters/Receivers The **ISL4221EIR** is a **RS-422/RS-485 interface transceiver** manufactured by **Intersil** (now part of Renesas Electronics). Below are its key specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:  

### **Specifications:**  
- **Supply Voltage:** +5V ±10%  
- **Data Rate:** Up to **20Mbps**  
- **Operating Temperature Range:** **-40°C to +85°C**  
- **Number of Drivers/Receivers:** **1 Driver, 1 Receiver**  
- **ESD Protection:** **±15kV (Human Body Model)**  
- **Package:** **8-Lead SOIC**  

### **Description:**  
The ISL4221EIR is a **high-speed**, **low-power** RS-422/RS-485 transceiver designed for **full-duplex** communication. It is suitable for industrial, automotive, and telecom applications requiring robust differential data transmission.  

### **Features:**  
- **20Mbps High-Speed Operation**  
- **Low Power Consumption (5mA typical supply current)**  
- **Enhanced ESD Protection (±15kV HBM)**  
- **Hot-Swap Inputs (No Power-Sequencing Issues)**  
- **Full-Duplex Communication**  
- **Short-Circuit Protection on Driver Outputs**  
- **Compliant with **TIA/EIA-422-B** and **TIA/EIA-485-A** Standards**  

This information is strictly based on the manufacturer's datasheet and technical documentation.

QFN Packaged/ +/-15kV ESD Protected/ +2.7V to +5.5V/ 150Nanoamp/ 250kBps/ RS-232 Transmitters/Receivers

QFN Packaged/ +/-15kV ESD Protected/ +2.7V to +5.5V/ 150Nanoamp/ 250kBps/ RS-232 Transmitters/Receivers The ISL4221EIR is a dual RS-232 transceiver manufactured by INTERSIL (now part of Renesas Electronics).  

### **Specifications:**  
- **Supply Voltage:** 3V to 5.5V  
- **Data Rate:** Up to 120kbps  
- **Operating Temperature Range:** -40°C to +85°C  
- **Number of Drivers/Receivers:** 2 Drivers, 2 Receivers  
- **ESD Protection:** ±15kV (Human Body Model)  
- **Package:** 16-Lead SOIC  

### **Descriptions:**  
- The ISL4221EIR is a low-power, dual RS-232 transceiver designed for battery-powered and portable applications.  
- It complies with EIA/TIA-232 and V.28/V.24 standards.  
- Features auto-powerdown to conserve energy when not in use.  

### **Features:**  
- **Low Power Consumption:** Operates from a single 3V to 5.5V supply.  
- **Auto-Powerdown:** Automatically enters low-power mode when no signal is detected.  
- **Enhanced ESD Protection:** Protects against electrostatic discharge up to ±15kV.  
- **Small Footprint:** Available in a 16-lead SOIC package for space-constrained applications.  
- **On-Chip Charge Pump:** Eliminates the need for external voltage converters.  

This device is commonly used in industrial, medical, and portable electronics requiring reliable RS-232 communication.

QFN Packaged/ +/-15kV ESD Protected/ +2.7V to +5.5V/ 150Nanoamp/ 250kBps/ RS-232 Transmitters/Receivers